f = 1/3 swings per second
or
f = 1 swing per 3 seconds
The frequency of a swing with a period of 3 seconds is approximately 0.33 Hz, calculated using the relationship f = 1/T.
The question is asking us to calculate the frequency of a swing given its period. The known period of the swing is 3 seconds. To find the frequency, which is the number of cycles the swing completes in one second, we can use the relationship between period (T) and frequency (f), which is f = 1/T. Thus, for a period of 3 seconds, the frequency is simply f = 1/3 seconds = 0.333... cycles per second, or approximately 0.33 Hz when rounded to two decimal places.
Two people are pushing a couch from opposite sides. one person pushing to the right with a force of 3 N. the other person pushes to the left a force of 4 N. which of the following best describes how the couch will move?
a) the couch will move to the left with a force of 1 N.**
b) the couch will not move.
c) the couch will move to the right with a force of 7 N.
d) the couch will move to the left with a force of 7 N.
i think its A correct me if im wrong
letter a because 4N to the left +3N to the right = 4N left minus 3N left as you change the direction of 3N then you also change the plus into minus. the direction will always favour to which of the direction is bigger
The couch will move to the left with a net force of 1 N, as the 4 N force to the left is greater than the 3 N force to the right. This is assuming that the applied force is sufficient to overcome the frictional force that may keep the couch stationary.
The situation described in the question involves two forces acting in opposite directions on an object, which in this case is a couch. When one person pushes to the right with a force of 3 N and another person pushes to the left with a force of 4 N, the net force on the couch can be determined using the principles of Newton's second law. To find the net force, we subtract the smaller force from the larger force, giving us an overall force of 1 N to the left. Therefore, the correct answer is (a) the couch will move to the left with a force of 1 N.
However, it's important to note that actual movement depends on whether the force applied exceeds the frictional force acting on the couch. In the scenario provided, without additional information about the frictional force, we cannot definitively say that the couch will move. If the net force is sufficient to overcome static friction, then the couch will begin to move to the left. But if the frictional force is greater than the net force applied, the couch will remain stationary.
An African elephant can heights of 4m and possess a mass of as much as 6000kg. Determine the weight of an African elephant in Newton
The weight of the African elephant is 58,800 Newtons.
Explanation:
Step 1:
Mass of the African Elephant = 6000 Kg
We need to find the weight of African elephant in Newton.
Step 2 :
Weight in Newtons = Mass of the object × acceleration due to gravity (g)
We know that value of g is 9.8 m/sec²
Hence the required weight = 6000 × 9.8 = 58,800 Newtons
The height of the elephant can reach 4 m. But the weight of any object is nit dependent on the height and hence this information is not required to compute the weight.
Step 3 :
Answer :
The weight of the African elephant is 58,800 Newtons.
The weight of the elephant is 58,800 N.
Explanation:
Weight in Newtons (N) can be found by multiplying mass which is measured in kilograms (kg) and acceleration due to gravity that has a constant value of 9.8 m/s².
Weight = mass of the elephant × acceleration due to gravity
= 6000 kg × 9.8 m/s²
= 58,800 kg m/s² or Newton.
So the weight of the elephant is 58,800 N. Here the height of the elephant doesn't required in the calculation of the weight of the elephant.
2. Compare and contrast light microscopes, electron microscopes,
and atomic force microscopes.
Answer:
Answer is the explanation.
Explanation:
A light microscope (LM) is an instrument which uses the visible light and magnifying glasses to examine small objects that are invisible to the naked eye or have finer details than the naked eye allows. However, magnification is not the main problem in microscopy.
Electron microscopy (EM) is a technique for obtaining high-resolution images of biological and non-biological samples. It is used in biomedical research to study the detailed structure of tissues, cells, organelles and macromolecular complexes.
An atomic force microscope is a type of high-resolution scanning probe microscope with a resolution that can be measured in fractions of a nanometer. It was launched in 1986 by Nobel Prize winners Gerd Binnig, Calvin Quate and Christoph Gerber.
Light microscopes, electron microscopes, and atomic force microscopes each offer unique advantages and limitations. Light microscopes are suitable for live specimens, electron microscopes provide higher resolution but kill the specimen, and atomic force microscopes achieve atomic-level detail without needing a vacuum.
Comparison of Light Microscopes, Electron Microscopes, and Atomic Force Microscopes
Microscopes are essential tools in biology, allowing us to view details not visible to the eye. There are three main types of microscopes: light microscopes, electron microscopes, and atomic force microscopes, each with unique features and applications.
Light Microscopes
Light microscopes use visible light to illuminate specimens and achieve magnification through a series of optical lenses. Some common types include:
Brightfield microscope: Provides a bright background with a dark specimen, requiring staining for better contrast.Darkfield microscope: Produces a bright image of the specimen against a dark background, ideal for viewing unstained specimens.Phase-contrast microscope: Enhances contrast in transparent specimens without staining, useful for viewing live cells.Light microscopes can view living organisms, but their resolution is limited by the wavelength of light.
Electron Microscopes
Electron microscopes utilize beams of electrons for imaging, resulting in higher magnification and resolving power than light microscopes. Common types include:
Transmission electron microscope (TEM): Electrons pass through the specimen, revealing internal structures.Scanning electron microscope (SEM): Electrons scan the surface of the specimen to create detailed surface images.Specimen preparation for electron microscopy kills the specimen, making it unsuitable for observing live cells.
Atomic Force Microscopes
Atomic force microscopes (AFM) use a mechanical probe to scan the surface of a specimen at the atomic level, providing high-resolution images without requiring a vacuum. This allows for the observation of samples in various environments, including aqueous solutions.
In summary, while light microscopes are suitable for live specimens and basic imaging, electron microscopes offer higher detail at the cost of sample viability. Atomic force microscopes provide the highest resolution without the need for a vacuum, useful for studying live samples in different environments.
gravity has traditionally been defined as a force of attraction between things that have what
Answer:
mass
Explanation:
(I) How long will it take a 1750-W motor to lift a 315-kg
piano to a sixth-story window 16.0 m above?
Answer:
Time, t = 28.22 s.
Explanation:
Given data:
Power, [tex]P = 1750 \ \rm W[/tex]
Mass, [tex]m = 315 \ kg[/tex]
Height, [tex]h = 16.0 \ m[/tex]
Let the time required to lift the piano to 16.0 m above be t.
We know that,
[tex]P = \frac{W}{t}[/tex]
[tex]P = \frac{mgh}{t}[/tex]
[tex]\Rightarrow \ t = \frac{mgh}{P}[/tex]
[tex]t = \frac{315 \times 9.80 \times 16.0}{1750}[/tex]
[tex]t = 28.22 \ s.[/tex]
It will take the motor 28.224 seconds to lift the piano to the sixth-story window.
Given the following data;
Power = 1750 Watts Mass = 315 Kilograms Height = 16.0 metersWe know that acceleration due to gravity is equal to 9.8 m/s².
To find how long it will take to lift the piano to the sixth-story window;
First of all, we would have to determine the gravitational potential energy required to lift the piano up.
Mathematically, gravitational potential energy is calculated by using the formula;
[tex]G.P.E = mgh[/tex]
where:
G.P.E is the gravitational potential energy of an object. m is the mass of the object. g is the acceleration due to gravity. h is the height of the object.Substituting into the formula, we have;
[tex]G.P.E = 315 \; * \; 9.8 \; * \; 16[/tex]
G.P.E = 49,392 Joules
Next, we would determine the time using the following formula;
[tex]Time = \frac{Energy}{Power}[/tex]
Substituting the values into the formula, we have;
[tex]Time = \frac{49392}{1750}[/tex]
Time = 28.224 seconds
Therefore, it will take the motor 28.224 seconds to lift the piano to the sixth-story window.
Find more on power, time and energy here: brainly.com/question/20488953
An illness caused by protist.
Answer:la mayoría de las enfermedades Protista son causados por protozoos
Explanation:
4. Which of the following would be a good reference point to describe the motion of a dog?
a. the ground
b. another dog running
C. a tree
d. All of the above
ANOTHER RUNNING DOG
Explanation:
In the given question it is to find a suitable reference point to describe the motion of dog. Here I could suggest that it is better to compare the dog with another running dog to create the relative speed difference to get a reliable motion variation.
Because the motion of dog is in the linear with respect to the another dog and to the acceleration produced by the dog in the required interval is easy to calculate with respect to another dog which is already in motion.
Hence, I suggest that Motion of dog can be analysed better by analyse the motion variation of dog with another dog running.
The correct option is b. another dog running.
The following information should be considered:
In this, we have to compare the two dogs so that the difference of the relative speed should be developed. As the motion of the dog is in the linear if we compared to the another dog also the acceleration generated by the dog should be for the required interval and be easy for determining for the another dog.Learn more: brainly.com/question/17429689
Imagine being somewhere in the universe free from all gravitational and frictional influences. While you are there, you throw a baseball. That ball will:
A.
Move forward, and gradually stop moving.
B.
The ball will not move at all.
C.
The ball will continue to move forward with the same speed and direction.
D.
None of the above.
The ball will continue its motion with same speed and along same direction on account of its inertia. Hence, option (C) is correct.
We can consider Newton's Law of inertia here to explain the given problem. Newton's law of inertia or Newton's first law says that, "If any object is in motion such that there is no external force is applied on it. So, it will continue to be in motion, until any force cause it to stop". This simply means that nothing moves without force and nothin stops without force.
Now consider the given case, where we are free from all the gravitational and frictional influences, such that on throwing the baseball with some speed, the ball will continue to move with same speed and in the same direction, until something struck its path.
Here stuck by the path means a force, therefore force can only cause the ball to stop or to change its direction.
Thus, we can conclude that the ball will continue its motion with same speed and along same direction on account of its inertia.
Learn more about the Newton's first law here:
https://brainly.com/question/974124
A longitudinal wave is a combination of a transverse wave and a surface wave.(true or false)
Answer: True
Explanation:
WILL GIVE BRAINIEST! Which of the following correctly defines mechanical energy?
1 energy produced by machines
2 the energy due to the motion or position of objects on a macroscopic scale
3 the difference between kinetic and potential energy of objects
4 the sum of chemical and kinetic energy of objects
Answer:
4 the sum of chemical and kinetic energy of object
Answer:
The correct answer is "the energy due to the motion or position of objects on a macroscopic scale"
Give the correct balanced equation for the single replacement reaction of magnesium with aluminum oxide
A)
Mg + AIO - MgO + Al
B)
Mg + Alz0z - M90 + AL
3Mg + Al2O3 – 3MgO + 2A
D)
Mg + A1,0- Mgo
Al
Answer:
Al2O3 + 3Mg ===》 3MgO + 2Al
Explanation:
Reaction of aluminium oxide with magnesium metal would form magnesium oxide and aluminium metal.
Balancing the stoichiometric equation, the number of atoms at the reactant must be equal to the number of atoms at the product so that law of conservation of matter must hold.
Al203 + 3Mg ====》 3MgO + 2Al
2 aluminium at reactant = 2 aluminium at product
3 oxygen at reactant = 3 oxygen at product
3 magnesium at reactant = 3 magnesium at product.
Which of the following is not one of the steps in the scientific method?
A. Hypothesize
B. summarize -
C. Familiarize
D. Analyze
Answer:
Familiarize
Explanation:
'Familiarize' is not a typical step in the scientific method. The steps usually include Observation, Question, Hypothesis, Experiment, Analyze, and Conclusion.
Explanation:Among the given options, C. Familiarize is not one of the steps in the scientific method. The scientific method, commonly used in scientific research, follows a series of steps:
Observation, Question, Hypothesis, Experiment, Analyze and Conclusion. While 'Summarize' may seem unusual, it can be considered part of the conclusion stage, where the results of the experiment are summarized. 'Familiarize' is not a typical step in this process.
Learn more about Scientific Method here:https://brainly.com/question/37065071
#SPJ2
Question 1: How would you determine the length of Jupiter's orbit using Kepler's third
law? What information would you need?
Final answer:
To determine the length of Jupiter's orbit using Kepler's third law, information needed includes Jupiter's orbital period (11.86 years) and semimajor axis (5.20 AU). Using these, you verify the relationship P² ≈ a³ and calculate the orbit size.
Explanation:
To determine the length of Jupiter's orbit using Kepler's third law, you would need two key pieces of information: the time it takes for Jupiter to complete one orbit around the Sun (its orbital period) and the average distance of Jupiter from the Sun (its semimajor axis). Kepler's third law states that the square of the orbital period (P) of a planet is directly proportional to the cube of the semimajor axis (a) of its orbit, mathematically written as P² ≈ a³.
From this relationship, if you know one of the values (P or a), you can calculate the other. For Jupiter, its orbital period is approximately 11.86 Earth years, and its semimajor axis is about 5.20 Astronomical Units (AU). Using these values, you can confirm that its period squared is proportional to its semimajor axis cubed, which is consistent with Kepler's law. This law is valid for any two objects orbiting each other and does not depend on the masses of the planets or the Sun.
Thus, by knowing the values of Jupiter's orbital period or semimajor axis, Kepler's third law allows us to calculate and verify the expected size of its orbit around the Sun.
To determine the length of Jupiter's orbit using Kepler's third law, you need to know Jupiter's orbital period and the semi-major axis of its orbit.
Kepler's third law states that the square of the period of revolution (P) is proportional to the cube of the semi-major axis (a):
[tex]P^2 \propto a^3 \\[/tex]The formula can be written as:
[tex]P^2 = k \cdot a^3 \\[/tex]For objects orbiting the sun, k is approximately equal to 1 when P is in years and a is in astronomical units (AU).
Given Jupiter's orbital period (P) is 11.86 years and the semi-major axis (a) is 5.20 AU, you can verify the relationship by calculating:
[tex]P^2 = 11.86^2 = 140.83 \\[/tex][tex]a^3 = 5.20^3 = 140.61[/tex]Since 140.83 ≈ 140.61, Kepler's third law holds true.
PLEASE HELP, LOOK AT PHOTO PLZ!!!
Problem 1. Read directions and answer questions using the diagram below
An object moves from point A to point B to point C, then back to point B and then to point C along
the line shown in the figure below.
a) Find the distance covered by the moving object.
b) Find the displacement of the object.
Answer:
a) 17 km
b) 9 km
Explanation:
The distance is the length of the path.
A to C: 5 km
B to C: 4 km
C to B: 4 km
B to C: 4 km
Total distance = 5 km + 4 km + 4 km + 4 km = 17 km
Displacement is the difference between the starting point and ending point.
Displacement = 9 km − 0 km = 9 km
The conductor is connected to a 12V voltage, with a current of 500mA flowing through the conductor. During what time will the electricity work be 100J?
F = force
l = length
P = power
t = time
U = potential energy
R = resistance
E = energy
Answer:
The time needed for energy to reach 100J is 16.7s
Explanation:
Using the formula, P=V×I and P=Q/t where I is current and Q is energy :
500mA = 0.5A
P = 0.5 × 12
= 6W
6 = 100/t
t = 100/6
= 16.7s
Explain why the model of this chemical reaction obeys the Law of Conservation of Matter.
Answer: Yes
Explanation: The law of conservation of mass explains that the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
Answer:
because there are the same number of atoms of each element shown on both sides
Explanation:
i did the usa test prep
Which of the following refers to an attractive force between two objects due to their mass
Answer:
Gravitational force
Explanation:
Gravitational force is a force that attracts any two objects with mass.
Hiran is standing beside the road when he hears a bird flying away from hip and chirping. The bird’s chirp has a frequency of 1800hz, and the bird flying away from him at 6m/s. What frequency does hiran hear? Assume the temperature is 20 Celsius.
The frequency of bird chirping hear by hiran will be 1.77 kHz.
Explanation:
As per Doppler effect, the observer will feel a decrease in the frequency of the receiving signal if the source is moving away from the observer. So the shifted frequency is obtained using the below equation:
[tex]f'=\frac{c}{c+v_{s} }f[/tex]
Here , c is the speed of sound, Vs is the velocity of source with which it is moving away. f is the original frequency of source and f' is the frequency shift heard by the observer.
As here, f = 1800 Hz, Vs= 6 m/s and c = 343 m/s, then
[tex]f'=\frac{343}{343+6} \times 1800=1.77\ kHz[/tex]
So, the frequency of bird chirping hear by hiran will be 1.77 kHz.
The frequency that Hiran hears, given that a bird is flying away from him and emitting a frequency of 1800Hz, is approximately 1755 Hz. This is calculated using the Doppler Effect formula, as Hiran standing still and the bird moving away equate to a perceived decrease in the frequency of the bird's chirps.
Explanation:The subject of this question is related to the phenomenon of the Doppler Effect. The Doppler Effect is a change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. In this case, the bird flying away from Hiran represents a source of sound moving away from the observer, which results in a perceived decrease in frequency (pitch) of the sound.
For the scenario provided, we can use the Doppler Effect formula which is: f' = f * (v + vo) / (v + vs), where:
f' is the observed frequencyf is the source frequency (1800 Hz, as given)v is the speed of sound in air which, at 20 degrees Celsius, is approximately 343 m/svo is the speed of the observer, which is 0 because Hiran is standing stillvs is the speed of the source, which is -6 m/s because the bird is moving away
Plugging these values into the formula, we get f' = 1800 Hz * (343 m/s + 0) / (343 m/s - 6 m/s). Simplifying this, we find that the frequency Hiran hears is approximately 1755 Hz.
Learn more about Doppler Effect here:https://brainly.com/question/15318474
#SPJ11
Which scientists supported the idea that light is made of streams of particles? Check all that apply.
Answer:
Albert Einstein and issac Newton
Explanation:
Answer:
a and d
Explanation:
edge 2021
what is an electrical charge how does it create electrical current
Answer:
Explanation:
The moving charged particles in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom, and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.
The flow of electrons in a direction is known as electric current. The tendency of attraction between the positive and negative charges makes electric current flow through a wire
An electrical charge, being either positive or negative, is a property that causes particles to experience force within an electric field. Electric current is the flow of these charges, driven by voltage sources such as batteries, across conductive materials. The current's strength is influenced by the applied voltage and the material's resistivity.
What is Electrical Charge and How Does it Create Electrical Current?
Electrical charge is a fundamental property of particles that causes them to experience a force when placed in an electric field. There are two types of charge, positive and negative, and like charges repel each other while opposite charges attract. This concept of charge is crucial in explaining how electric currents are created and maintained.
An electric current is the rate of flow of electric charge through a conductor, such as a wire. In metals, the charge carriers are primarily electrons, which are negatively charged particles that move through the metal's lattice when a potential difference (voltage) is applied across the conductor. This movement of charge constitutes the electric current.
Devices like batteries and generators create a potential difference in a circuit, and consequently an electrical field, which pushes the free charges to move. The amount of current that flows depends on both the voltage applied and the resistivity of the material through which charges are moving. Resistivity is a measure of how strongly a material opposes the flow of electric current, and it varies from material to material.
In different mediums, various charged particles may carry the current. In our bodies, for instance, current is carried by ions such as sodium ions (Na+), while in metal wires, it is carried by electrons. The existence of an electric current is fundamental to our technology, as it powers everything from simple torches to complex electric trains and computers, and even the neuronal activities in our brains.
Charges are responsible for creating electric fields, which can attract or repel other charges depending on their polarity. Positive charges are sources of electric fields, while negative charges act as sinks. It is this interplay between charges and electric fields that permits the generation and control of electric currents, leading to our ability to harness electricity for countless applications.
Why does coil have to spin in a generator?
Answer:Why does coil have to spin in a generator?
Explanation: because when the coil spin it creates speed and conducts eletriced
Is there any questions about the human or animal behavior that you would really like to answer? Generate a hypothesis and briefly describe how you would conduct an experiment to answer your question.
Is it possible to make an animal go to sleep. Null hypothesis is, yes you can. Alternate hypothesis is no you can't.This has been tested on parrots,rabbit and pigeon and dog. Normally, It sometimes gets really hard for an infant or child to sleep, In order to sleep is you got to do slow blinks which mean you close your eyes or keep semi closed for 10 seconds at you do this couple of time a child does sleep. Same was tested with few animals go in front of the animal dont touch them keep them at least half a feet away from you and slow blink several time you would see the animal connecting with you several times.Does it sleep No it doesn't but it does connect with you if you do this several time.
Explanation:
Human and Animals are inversely proportional to each other.There existence is eat-sleep-survive there life ends in this.Human are a paradigm shift which explains the universe.Animal are tamed because they understanding ability is quite weak.There behavior is some how closely connected to humans.They do remember there owners, It is always claimed they are even.Better then human being in a relationship. Animals are precious to us.Aggression can sensed if they could sense for the danger of family.Final answer:
To answer a question about the impact of human presence on urban wildlife foraging behavior, a hypothesis could be established, and an experiment involving observational techniques and motion-activated cameras could be conducted in areas of varying human activity to collect and analyze behavior data.
Explanation:
If I were to answer a question about human or animal behavior, a topic of interest might be: Does the presence of humans affect the foraging behavior of urban wildlife? To investigate this, I would generate a hypothesis such as: Urban wildlife species forage less efficiently in areas with high human activity compared to areas with low human activity.
To test this hypothesis, I would design an experiment with two key locations: one with high human traffic and one with minimal human activity. Using motion-activated cameras to record foraging behavior, along with direct observational techniques, I would monitor selected wildlife species, such as urban foxes or squirrels, over a predetermined period. The data collected would be analyzed to compare the time spent foraging and the success rate in both locations. Variations in foraging patterns could offer significant insight into how human presence influences animal behavior.
The experiment would be informed by the scientific method, involving observation, background research, and data analysis, to arrive at a conclusion. The results might also be of interest to those studying ecology, conservation biology, and urban planning, making this study holistic in nature.
The vacuum tube was replaced with what electrical component?
Answer:
The vacuum tube was replaced with transistor.
Explanation:
The invention of semiconductor was very useful in making solid state transistor that allowed the production of small yet faster, cheaper, and more trusted and reliable computers.These solid state transistor is so often used that, it nearly replaced all the use of transistor. This replacement took place after the invention of semiconductor in the year around 1940. Vacuum tubes also known as thermionic tubes are not used anymore in computers and electronics.How far will a body move in 4 seconds if uniformly accelerated from rest at rate of 2m\sm\s
Answer:
16 m
Explanation:
For an object in uniformly accelerated motion (=with constant acceleration), the distance covered by the body can be found by using the following suvat equation:
[tex]s=ut+\frac{1}{2}at^2[/tex]
where
s is the distance covered
u is the initial velocity
t is the time
a is the acceleration
For the body in this problem,
u = 0 (it starts from rest)
[tex]a=2 m/s^2[/tex] is the acceleration
Substituting t = 4 s, we find the distance covered:
[tex]s=0+\frac{1}{2}(2)(4)^2=16 m[/tex]
Two people are pushing a couch from the same side. One person pushes with a force of 2 N. The other person pushes with a force of 4 N.
a) The couch will move with a force of 8 N.
b) The couch will move with a force of 2 N.
c) The couch will not move.
d) The couch will move with a force of 6 N.
Answer:
the answer is letter d because both of them are pushing the couch in the same direction so 4 plus 2 will give you 6N
. 30
• A l-m pry bar is held horizontally and used to open a crate. The tip of the
bar, which serves as the fulcrum, is pushed in a distance of 2 cm between
the crate lid and the crate. If a 20-N force is applied perpendicularly to the
end of the bar, what force is applied on the crate lid?
(A) IN
(B) 100 N
(C) 10 N
(D) 1,000 N
(E) 10,000 N
Answer:
Explanation:
Length if the bar is 1m=100cm
The tip of the bar serves as fulcrum
A force of 20N (upward) is applied at the tip of the other end. Then, the force is 100cm from the fulcrum
The crate lid is 2cm from the fulcrum, let the force (downward) acting on the crate be F.
Using moment
Sum of the moments of all forces about any point in the plane must be zero.
Let take moment about the fulcrum
100×20-F×2=0
2000-2F=0
2F=2000
Then, F=1000N
The force acting in the crate lid is 1000N
Option D is correct
Final answer:
The force applied on the crate lid when a 20-N force is applied perpendicularly at the end of a 1-m long pry bar, with the pivot point 2 cm from the crate lid, is 1000 N. This is calculated using the principle of levers.
Explanation:
The question is asking to determine the force applied on the crate lid when using a pry bar as a lever. The system can be analyzed using the principle of moments (or the lever principle), where the force exerted by the lever is calculated based on the force applied and the distances from the fulcrum (the point of rotation).
In the given scenario, a 20-N force is applied perpendicular to the pry bar at a distance of 1 meter from the fulcrum. The fulcrum is inserted 2 cm (0.02 m) away from where the force is applied to the crate lid. To find the force applied on the crate lid (F_crate), we can set up the following proportion based on the principle of levers:
F_applied x distance_from_fulcrum_to_F_applied = F_crate x distance_from_fulcrum_to_F_crate
Using the values from the question
20 N x 1 m = F_crate x 0.02 m
Solving for F_crate:
F_crate = (20 N x 1 m) / 0.02 m
F_crate = 1000 N
Therefore, the force applied on the crate lid is 1000 N, which corresponds to option (D).
two charges 5 c and 15 c are seperated by 10 cm. what is the electric force between them?
Answer:
6.75×10^13N
Explanation:
The electric force between the charges can be determined using coulombs law which states that 'the force of attraction between two charges is directly proportional to the product of the charges and inversely proportional to the square of their distance between them.
Mathematically, F = kq1q2/r² where;
q1 and q2 are the charges
r is the distance between the charges
F is the force of attraction
k is the coulombs constant
Given q1 = 5C q2 = 15C r = 10cm = 0.1m k = 9×10^9Nm²/C²
Substituting the given values in the formula we have;
F =9×10^9×5×15/0.1²
F = 6.75×10^11/0.01
F = 6.75×10^13N
Therefore the electric force between them is 6.75×10^13N
How does the input distance of a single fixed pulley compare to the out- put distance?
A pulley is another sort of basic machine in the lever family. We may have utilized a pulley to lift things, for example, a banner on a flagpole.
Explanation:
The point in a fixed pulley resembles the support of a lever. The remainder of the pulley behaves like the fixed arm of a first-class lever, since it rotates around a point. The distance from the fulcrum is the equivalent on the two sides of a fixed pulley. A fixed pulley has a mechanical advantage of one. Hence, a fixed pulley doesn't increase the force.
It essentially alters the direction of the force. A moveable pulley or a mix of pulleys can deliver a mechanical advantage of more than one. Moveable pulleys are appended to the item being moved. Fixed and moveable pulleys can be consolidated into a solitary unit to create a greater mechanical advantage.
B. What information did Wegener not have that would have strengthened his argument? (3
points)
tance
Explanation:
Alfred Wegener was a German astronomer who proposed the "continental drift" hypothesis in 1910. Alfred Wegener was not able to explain the movements of the continent in how and in which way they are moved. He failed in an attempt to explain with the use of tides made the theory undefinable fully. Also, the major problem with Wegener's theory of Continental Drift was that there was no proper explanation of a mechanism.Wegener's argument for continental drift would have been stronger if he had knowledge of seafloor spreading, plate tectonics, and a detailed mechanism for how continents move.
Explanation:Alfred Wegener did not have certain pieces of geological and geophysical evidence to support his theory of continental drift, which could have strengthened his argument. Some of the missing evidence includes a detailed mechanism for how the continents moved, a mechanism for how the Earth's crust could move through the denser underlying mantle, and direct evidence of seafloor spreading and plate tectonics.
If Wegener had these additional pieces of evidence, his argument for continental drift would have been much stronger. For example, the discovery of seafloor spreading and plate tectonics in the mid-20th century provided a mechanism for how continents could move and explained the distribution of earthquakes and volcanoes along plate boundaries. The mapping of the Earth's magnetic field also later provided evidence for plate tectonics.
In summary, Wegener's argument for continental drift would have been significantly strengthened if he had knowledge of seafloor spreading, plate tectonics, and a detailed mechanism explaining how the continents move.
Learn more about Continental drift here:
https://brainly.com/question/32791909
#SPJ3
What is the relationship between energy, matter and waves
Answer:
They all travel ??In waves??
i think
(～￣▽￣)～
In physics, there is a close relationship between energy, matter, and waves. Matter can be modeled as waves under certain conditions, and electromagnetic radiation can be described as waves that transfer energy to matter. Matter waves exhibit wave-particle duality and have a wavelength inversely proportional to momentum.
Explanation:In the field of physics, there is a close relationship between energy, matter, and waves. Matter can be modeled as waves under certain regimes of energy or distance, according to the principles of quantum mechanics. Electromagnetic radiation, which is a form of energy, can be described as waves with a specific frequency and wavelength. These waves of electricity and magnetism, also known as photons, can interact with matter and transfer energy to it.
Furthermore, matter waves, proposed by Louis de Broglie, reflect the wave-particle duality of matter. All types of matter, including protons, electrons, and neutrons, exhibit wave-like properties. The wavelength of a matter wave is inversely proportional to the momentum of the particle. In addition, the energy and momentum of photons, derived from Einstein's theory of special relativity, have a relationship defined by the equation E = pc, where E represents energy, p represents momentum, and c represents the speed of light.
Therefore, the concepts of energy, matter, and waves are closely intertwined in physics, with waves providing a mathematical model for the transfer of energy and momentum without the permanent transfer of mass.