90.2 m/s. A rock dropped from rest after it has falling for 9.2 seconds will have a velocity of 90.2m/s.
The bodies left in free fall increase their speed (downwards) by 9.8 m/s² every second. The acceleration of gravity is the same for all objects and is independent of the masses of these. In the free fall the air resistance is not taken into account.
v = g*t
v = (9.8m/s²)(9.2s) = 90.2 m/s
A projectile is launched horizontally from a height of 8.0 m. The projectile travels 6.5 m before hitting the ground.
The velocity of the projectile the moment it was launched, rounded to the nearest hundredth, is
Answer:
5.09 m/s
Explanation:
Use the height to find the time it takes to land:
y = y₀ + v₀ᵧ t + ½ gt²
0 = 8.0 m + (0 m/s) t + ½ (-9.8 m/s²) t²
t = 1.28 s
Now use the horizontal distance to find the initial velocity.
x = x₀ + v₀ₓ t + ½ at²
6.5 m = 0 m + v₀ (1.28 s) + ½ (0 m/s²) (1.28 s)²
v₀ = 5.09 m/s
The velocity of the projectile the moment it was launched, rounded to the nearest hundredth would be 5.09 m/s.
What is a projectile motion?It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.
As given in the problem, a projectile is launched horizontally from a height of 8.0 m. The projectile travels 6.5 m before hitting the ground.
y = y + v ×t + 1/2 × gt²
0 = 8.0 + v t + 1/2 × -9.8 × t²
t = 1.28 s
x = x + v t + 1/2 at²
6.5 m = v 1.28 + 1/2 × 1.28²
v = 5.09 m/s
Thus, the velocity of the projectile the moment it was launched, rounded to the nearest hundredth, is 5.09 m/s.
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A wave with a frequency of 500 Hz is traveling at a speed of 100 m/s.what is the wavelength?
Answer:
0.2m
The solution is in the picture
A region of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called
Answer:
Gravitational field
Explanation:
An object of mass M exerts a force (gravitational force) of attraction on any other object of mass m. The magnitude of this force is
[tex]F=G\frac{Mm}{r^2}[/tex]
where G is the gravitational constant and r the separation between the two objects.
Since the object of mass M exerts this force on any other object located around it, we can think as a "gravitational field", which is the region of space around the object of mass M that exerts a gravitational force on other object. This way, the force exerted on another object of mass m can be rewritten as
F = mg
where
[tex]g=\frac{GM}{r^2}[/tex]
is called strength of the gravitational field.
true or false static is weightless colorless and odorless
Answer:
True.
Explanation:
Which lists the fundamental forces in order, from strongest to weakest?
strong nuclear, weak nuclear, electromagnetic, gravitational
strong nuclear, electromagnetic, weak nuclear, gravitational
gravitational, weak nuclear, electromagnetic, strong nuclear
electromagnetic, gravitational, strong nuclear, weak nuclear
The answer which lists the fundamental forces in order, from strongest to weakest is:
Strong nuclear forceElectromagnetic forceWeak nuclear forceGravityFundamental forces are those necessary forces which acts on an object, changing its position
Nuclear force is the force which has to do with the nucleus of atoms
An electromagnetic force is one that has to do with en electrically charged particle.
Gravity is the force which acts on a mass of a body, pulling it downwards.
As a result of this, we can see that the strongest force is the nuclear force, while the weakest is the force of gravity.
Read more here:
https://brainly.com/question/4539561
Answer:
✅strong nuclear
A. is correct
Explanation:
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Every mass is attracted to each other in the universe through ___________.
A) electrostatic force
B) the force of gravity
C) magnetic force
D) nuclear force
Answer:
B) the force of gravity
Every mass is attracted to each other in the universe through the force of gravity.
Sunny~ ☺
AL(OH)2 is__
an acid
a base
a salt
Describe the path of the electric current through a circuit?
Answer:
current moves from positive terminal of a cell towards the negative terminal of a cell.
Explanation:
this happens when good conductors which have free electrons moving randomly within them.when a cell i s connected across the ends the free electrons moves in a given direction. then the current starts flowing in a opposite direction with electrons which moves negative terminal to positive terminal.
Final answer:
Electric current in a circuit flows through a closed conducting path enabling charge flow, defined as electric current, with components connected by conducting wires.
Explanation:
Electric current in a circuit follows a closed conducting path. In circuits, charge flows through a complete loop, with the charge flow rate defined as electric current.
An example is a simple circuit with a battery, a switch, and a load like a light bulb connected by conducting wires to provide a pathway for current flow.
When analyzing circuits, wires are treated as perfect conductors, and schematics are used to represent components with standardized symbols and solid lines for connections.
Q: The acceleration of gravity means that for each second that passes, falling objects move 9.8m? A:True
Answer: false
Explanation:
Answer:
False
Explanation:
If the object covers 9.8 m every second then it has a constant velocity of 9.8 m/s
The acceleration implies that there is a change in velocity. With a constant acceleration the velocity will change linearly.
[tex]S = ut + \frac{1}{2} gt^2[/tex]
The distance traveled each second will not be a constant, it will be a quadratic function as mentioned above.
A scientific law tells us what nature will do under certain conditions.
True
False
Hello There!
This Is A "True" Statement.
A scientific law tells us what nature will do under certain conditions.
Bohr’s atomic model differed from Rutherford's because it explained that electrons exist in specified energy levels surrounding the nucleus. electrons are embedded within the rest of the atom like plum pudding. an atom is an indivisible sphere. electrons circle the nucleus.
Answer:
electrons exist in specified energy levels
Explanation:
In its gold-foil scattering with alpha particles, Rutherford proved that the plum-pudding model of the atom theorised by Thomson was wrong.
From his experiment, Rutherford inferred that the atom actually consists of a very small nucleus, where all the positive charge is concentrated, and the rest of the atom is basically empty, with the electrons (negatively charged) orbiting around the nucleus at very large distance.
However, Rutherford did not specify anything about the orbits of the electrons. Later, Bohr predicted that the electrons actually orbit the nucleus in specific orbits, each orbit corresponding to a specific energy level. Bohr's model found confirmation in the observation of the emission spectrum lines: when an electron in one of the higher energy level jumps down into an orbit with lower energy, the atom emits a photon which has an energy exactly equal to the difference in energy between the two orbits (and this energy of the photon corresponds to a precise wavelength).
Answer:
A.electrons exist in specified energy levels surrounding the nucleus.
Is correct on edge!
Explanation:
Discuss potential behavioral concerns for people should they travel to Mars
Answer:
The ability of our bodies to adapt to different levels of gravity. You would become weaker and your heart is use to zero gravity. Boredom because there isn't much to in space. When intelligent people get bored, it's not pretty all the time...
how much power is used to lift a 1.9 kg brick 1.9 in 2.s
Answer:
18W
Explanation:
Power=work/time
Work =force x distance
Force = mass x acceleration due to gravity
F=1.9 x 10
F= 19N
W=19 x 1.9
W=36.1J
P=36.1/2
P= 18watts
A rock collection comes from which part of Earth?
Answer:
rocks form from the outer solid layer of the earth which is the crust
Explanation:
Answer:
Crust
Explanation:
Rock is a solid mass, a collection of minerals which occur naturally. There are three different types of rocks- Igneous, Sedimentary and Metamorphic. These vary in texture and composition. The rocks come from the upper most layer of the Earth- the crust. Heat, pressure, volcanoes, wind and water play important role in formation of rocks.
If you drive 12 miles north and 35 miles east, what is the direct distance between you and your starting point?
Answer:
For this, you need the pythagorean theorem, which is a^{2}+ b^{2}= c^{2}
Your a should be 12, and your b should be 35. So now you can solve for c, which equals 37 miles.
So the answer is 37 miles
What is the magnitude of the electric field at a point 0.0055 m from a 0.0025
C charge?
[tex]E = 7.45x10^{11} N/C[/tex]
The intensity of the electric field (E) or simply electric field at a point is a vector quantity representing the electric force (F ) that acts over a charge, Q', located at that point.
[tex]E=K\frac{Q}{r^{2}}[/tex], where K is the constant of propotionality, Q a charge, and r the distance between a point and the charge.
[tex]E = 9x10^{9} \frac{Nm^{2} }{C^{2} } \frac{0.0025C}{(0.0055m)^{2}}[/tex]
[tex]E = 7.45x10^{11} N/C[/tex]
The magnitude of the electric field 0.0055 m from a 0.0025 C charge is calculated using Coulomb's law, resulting in an electric field strength of 7.45 x 10¹¹ N/C.
The magnitude of the electric field at a certain point from a point charge. The formula to calculate the electric field (E) due to a point charge (q) at a distance (r) is given by Coulomb's law, E = k x |q| / r₂, where k is Coulomb's constant (8.99 x 109 Nm₂/C₂). For a charge of 0.0025 C at a distance of 0.0055 m, the magnitude of the electric field can be calculated by substituting these values into the formula.
First, substitute the known values into the equation: E = (8.99 x 109) x (0.0025) / (0.00552).
Next, perform the calculation: E = (8.99 x 10⁹) x (0.0025) / (0.00003025), which simplifies to E = 7.45 x 10¹¹ N/C.
This is the magnitude of the electric field at 0.0055 m from a 0.0025 C charge. The electric field strength indicates the force per unit charge that a test charge would experience in the vicinity of the source charge.
What is the electric potential at a point in space if a charge of 7.3 × 10-17 coulombs at that point has a potential energy of 6.4 × 10-17 joules?
Answer:
0.88 volts
Explanation:
We are given the amount of charge of a point ( 7.3 × 10^-17 ) along with its potential energy ( 6.4 × 10^-17 joules ).
We are to find the electrical potential at this point.
To find this, we will use the following formula:
[tex]V = \frac{Ep}{q}[/tex]
Substituting the given values in the above formula:
[tex]V = \frac{Ep}{q}V = \frac{6.4 * 10^{-17}\:J}{7.3 * 10^{-17}\:C}[/tex]
V = 0.88 volts
Answer:
V= 1.32 V
Explanation:
Electrical potential energy is calculated using the equation
Ue=1/2CV² where C is the charge and V the voltage at that point in space.
Making V the subject of the formula;
V= √( 2Ue /C)
V= √(2×6.4×10⁻¹⁷÷(7.3 × 10⁻¹⁷))
= 1.32 V
A localized impediment to electron flow in a circuit is a:
resistor
source of emf
conduit
conductor
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?
Answer:
They must be cooler than the air inside the house.
Explanation:
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. It is true to say that the coils are cooler than the air inside the house when they are accepting the heat inside the house. Heat will always flow from hot to cold substances
The aluminum coils in an air conditioner act as evaporator coils when accepting heat inside the house, absorbing thermal energy and transferring it outside after the refrigerant is compressed and condenses to a liquid.
When the aluminum coils in an air conditioner are accepting heat inside the house, they are acting as evaporator coils. During this phase, the coils absorb thermal energy from the indoor air. The electrically driven compressor works to raise the temperature and pressure of the refrigerant, causing it to transfer thermal energy and condense into a liquid. This liquid then moves to the outside of the house, where it passes through a pressure-reducing valve into the outdoor evaporator coils. Here, it expands and cools down, releasing the absorbed heat to the outside environment. This process is dictated by the principles of thermodynamics and is a practical application in cooling a home. Air conditioners and refrigerators work based on the same concept, where their efficiency is measured by the amount of heat transfer per work input, often expressed through the coefficient of performance (COP).
when a sound's intensity increases by a factor of 10, its decibel reading increases by how many decibels?
Answer:
If sound intensity increases by a factor of 10, the decibel reading increases by 10.
Explanation:
Decibel scale:
In order to express levels of sound meaningfully in numbers that are more manageable, a logarithmic scale is used, rather than a linear one. This scale is the decibel scale. every increase of 3 dB represents a doubling of sound intensity.
Increase in decibel scale is given by the formula:
n = 10*log(Increased Intensity of sound/Original Intensity of Sound
n = 10*log(I/I₀)
In our case the sound intensity increases by a factor of 10. So I/I₀ increased by 10 times and will be 10 I/I₀
n = 10*log(10 I/I₀)
n = 10*log(10) + 10log(I/I₀)
n = 10 + 10*log(I/I₀)
This shows that the decibel reading is increased by 10 points.
Answer:
10
Explanation:
if there's a small amount of friction between two surfaces, the result could be _______
select all that apply
A. no movement
B. heat
C. a little bit of movement
D. sliding around
Answer:A little bit movement
Explanation:
Answer:
all of them
Explanation:
ape x
How much force do you push down on the Earth with? (Hint: 1kg is about 2 pounds).
The force with which I push down on the Earth is PRECISELY equal to the force with which the Earth pushes UP on me.
I weigh EXACTLY the same amount on the Earth as the Earth weighs on me. Find THAT amount, and you'll have the answer to the question.
(Hint: 1 kg is a mass, and 2 pounds is a force, so they can never be equal. 1kg weighs about 2.2 pounds IF it happens to be on Earth. But if the same 1kg is on the Moon, then it weighs about 5.8 ounces. And if it happens to be on Mars, then it weighs about 13.3 ounces. The same kilogram weighs different weights in different places.)
On a good day, I push down on the Earth with about 890 Newtons of force. No matter how hard I try, I can never push more or less than that.
Force is the product of mass and acceleration. The force that an average person pushes down on the earth is about 598 N.
Force:It is defined as the product of the mass and acceleration. It is measured in Newton.
[tex]F= m a[/tex]
Where,
[tex]F[/tex] - force
[tex]m[/tex] - mass = 60 kg
[tex]a[/tex]- acceleration = 9.8 m/s²
Put the values in the formula,
[tex]F= 60 \times 9.8 \\\\F = 598 \rm \ N[/tex]
Therefore, the force that an average person pushes down on the earth is about 598 N.
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The beta decay of a radioactive isotope results in the conversion of a neutron into a proton and an electron. Assume that scientists have discovered that a new element is formed. Which of the following would best support our understanding that the proton defines an element’s identity?
Question 3 options:
The atomic number decreases by one.
The atomic number increases by one.
The mass number increases by one.
The mass number decreases by one.
a measure of how consistently a result is determined by repeated evaluations is called
Answer:
The answer is precision.
Answer:
Precision
Explanation:
Accuracy is the measure of how close to the actual value a reading is. Precision refers to the degree of closeness the values are to each other while taking a reading.
For example, if a manufacturer says the length of the table is 50 cm, then if you measure it you should also get 50 cm reading, this shows the reading is accurate. If the reading of the table is taken multiple times then if the values are suppose 49.9, 49.94 etc, then the reading is precise.
the brain is divided into 3 keys regions name them
Answer:
forebrain,midbrain, and hindbrain i think if that what your talking about? hope it helps
Explanation:
the areas are divided into Occipital lobe, Temporal lobe, Parietal lobe, Frontal lobe, cerebral cortex, cerebellum, hypothalamus, Thalamus, pituitary gland, pineal gland, amygdala, hippocampas and the midbrain.
Answer:
Forebrain, Midbrain, and Hindbrain.
Explanation:
Brain is complex structure which is work as control center of the whole body. Brain is helping in receive, send, processes and direct the sensory information. Brain is divided into three key regions with each having different functions.
Forebrain: It is known as the largest part of the brain. Optic cranial nerve and the olfactory are present on the forebrain part. Cerebrum is also the part of the forebrain which cover the 2-3rd part of the brain structure.
Midbrain: It connects the forebrain to the hindbrain. Brainstem which is formed by the composition of Midbrain and Hindbrain, helping to connect the cerebrum with spinal cord. Midbrain helping in to regulate movements and visual signals.
Hindbrain: It is composed of two subregions metencephalon and myelencephalon. It is helping in mentioning of equilibrium and balance, regulation of autonomic functions and coordination in movements.
Which team sport utilizes judges to determine the points earned? Football Hockey Rhythmic Gymnastics Soccer
Answer:
Rhythmic Gymnastics
Explanation:
In general, the judges in the sports tend to be in charge for correcting and controlling the breaking of the rules in the particular sport. They are allowed to punish the competitors in accordance with the breaking of the rule, or they are there in order to determine weather a point is regular or not. In the rhythmic gymnastics though, and sports similar to it, the judges have different role, as they are in charge of determining the points earned by the competitors. This is done in a manner where every judge gives certain amount of points, or grades, and when those are summed up, the competitors get their total points.
Diamond will scratch quartz. True or False
Answer:true, diamonds will scratch quartz.
Explanation: diamonds have a more compact composition. That is what makes them so hard. Quartz composition is not that compact, so diamond can scratch it.
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A light year is a measurement of ___________.
a) time
B) distance
c) speed
D) intensity
Answer:
B. distance
Explanation:
leads to 9.4607 × 1012 km the length of how it is associate that is traveled by light for a year in an astronomical unit of distance.
♡
Answer:
B) Distance
Explanation:
Think about how a light year is used.
Here is proof that my answer is correct:
In your own words, describe the purpose of using a chemical equation.
Answer:
The purpose of using a chemical reaction is to diagram a reaction, where the left side is formed by reactants and the right side is formed by the product. Through diagraming a reaction, chemists can hypothetically change parts of the both components, that way they would see what to expect in the reaction. Also, they can measure the approximation of amount of mass they would need, and see how components will change after the reaction
What mistake did Carl make?
Carl makes the table below to determine the number of
atoms of each element in the chemical formula 4Ca(CIO3)2.
Element Calculation
Calcium 1x4
Chlorine 1 x 2
Oxygen 3 x 2
Total atoms
4
2
6
He did not multiply the calcium atoms by the subscript 2.
He did not add the coefficient 4 to the chlorine and oxygen
atoms.
He did not add the subscript 2 to the calcium atoms.
He did not multiply the chlorine and oxygen atoms by the
coefficient 4.
Answer:
He did not multiply the chlorine and oxygen atoms by the coefficient 4
Explanation:
Answer:
The correct answer is:
'He did not multiply the chlorine and oxygen atoms by the coefficient 4'.
Explanation:
Number of atoms in [tex]4 Ca(ClO_3)_2[/tex]
The 4 in front of molecular formula of calcium chlorate is its coefficient . it tells us about the molecules or moles of compound.
Number of calcium in 1 molecule of calcium chlorate = 1
Calcium atoms in 4 molecule of calcium chlorate = 1 × 4 = 4
Number of calcium in 1 molecule of calcium chlorate = 2
Chlorine atoms in 4 molecule of calcium chlorate = 2 × 4 = 8
Number of oxygen in 1 molecule of calcium chlorate = 3 × 2 = 6
Oxygen atoms in 4 molecule of calcium chlorate = 6 × 4 = 24
So, number of atoms of different elements calculated by Carl was wrong as he didn't multiplied the coefficient 4 with chlorine and oxygen atoms.