Answer:
B
Explanation:
The nucleus is made up of protons and neutrons, and electrons float around the neucleus in the electron cloud.
The atomic nucleus is made up of two particles that are protons and neutrons.
Answer: Option B.
Explanation:
The atom has the core part as the nucleus in the center part of the atom. The nucleus consists of two particles. These are namely, protons and neutrons.
Proton contains a positive charge but whereas the neutron does not have any charges; therefore, the nucleus acquires the positive charge of the proton. Both of them together constitute the atomic mass and the mass number.
What is the centripetal acceleration of a small laboratory centrifuge in which the tip of the test tube is moving at 19.0 meters/second in a circle with a radius of 10.0 centimeters? A. 1.82 × 102 meters/second2 B. 3.61 × 103 meters/second2 C. 5.64 × 103 meters/second2 D. 2.49 × 103 meters/second2 E. 1.18 × 103 meters/second2
Answer:[tex]3.61(10)^{3} \frac{m}{s^{2}}[/tex]
The centripetal acceleration [tex]a_{c}[/tex] of an object moving in a uniform circular path is given by the following equation:
[tex]a_{c}=\frac{V^{2}}{r}[/tex]
Where:
[tex]V=19m/s[/tex] is the velocity
[tex]r=10cm=0.1m[/tex] is the radius of the circle
[tex]a_{c}=\frac{(19m/s)^{2}}{0.1m}[/tex]
[tex]a_{c}=3610m/s^{2}=3.61(10)^{3}m/s^{2} [/tex]
Jupiter Scaled Diameter of Planets (cm)
Answer:
14.3 cm
Hope this helps you out!
Answer:
25 cm
Explanation:
about the size of a basket ball
A tree limb of mass 12 kg falls straight down. If air resistance exerts 27 N of force on the limb as it falls, what is the net force on the tree limb
The net force is 27 n
Answer: 91N down
Explanation:
World class swimmers can swim the 100 meter in about 55 seconds what is their approximate average speed
About 1.8181 meters per second
Answer:
v = 1.82 m/s
Explanation:
As we know that average speed is defined as the total distance covered in total interval of time.
So here given that
total distance = 100 m
total time = 55 s
so here from above formula
[tex]v_{avg} = \frac{d}{t}[/tex]
[tex]v_{avg} = \frac{100}{55}[/tex]
[tex]v_{avg} = 1.82 m/s[/tex]
so the average speed of the swimmer will be 1.82 m/s
1. An 800-gram bowling ball is rolling in a straight line toward you. If its momentum is 16 kg•m/sec, how fast is it traveling?
Answer:
The ball is rolling at a speed of 0.02 meter per second.
Step by step explanation:
We are given that there is a 800 gram bowling ball rolling in a straight line. If its momentum is given to be 16 kg.m/sec, we are to find its velocity.
For this, we will use the formula of momentum.
Momentum = mass × velocity
16 = 800 × velocity
Velocity = 16/800 = 0.02 meter per second
Atoms form chemical bonds using:
A. Electrons in the innermost energy level
B. electrons in the outermost energy levels
D. Protons and electrons
A electrons in the innermost energy level
Atoms form chemical bonds using their outermost electrons, also known as valence electrons. The aim is to achieve a stable electronic configuration. An example can be seen in water molecules where oxygen shares its outermost electrons with hydrogen to form covalent bonds.
Explanation:Atoms form chemical bonds using their electrons in the outermost energy levels. These are known as valence electrons. The desire of atoms to reach a stable electronic configuration, often mimicking the electron configuration of noble gases, drives the formation of chemical bonds.
For example, in a water molecule (H2O), the oxygen atom shares its outermost electrons with two hydrogen atoms to form covalent bonds. These shared electrons provide each atom with a more stable electron configuration.
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What are the directions of movement for the Sagittarius, frontal, transverse planes ?
Answer:
Squats involve flexion (forward motion) and extension (backward on the way up), so would fit into the sagittal plane. Frontal plane motion would include leaning from left to right as in sidebends and lateral raises, or perhaps you might picture jumping jacks for a good image of movement along the frontal plane.
The Sagittarius plane, or sagittal plane, movements occur side to side, frontal (coronal) plane movements happen front to back, and transverse plane movements are rotational, involving the upper and lower sections of the body. An MRI scanner moves in corresponding directions to produce images in these planes.
Explanation:The movements associated with the sagittal plane, frontal plane (coronal plane), and transverse plane are crucial in anatomical and clinical settings such as MRI scanning, which uses these planes to create sectional images of the body.
The Sagittarius plane, or more accurately referred to as the sagittal plane, is a vertical plane that divides the body into right and left portions. An MRI scanner would move along the medial-lateral axis (side to side) to produce images in the sagittal plane. Flexion and extension movements, such as bending and straightening of the joints, occur within this plane.
The frontal plane, also known as the coronal plane, splits the body into front (anterior) and back (posterior) sections. To capture images in the frontal plane, an MRI scanner would need to move in an anterior-posterior direction (front to back).
The transverse plane divides the body into upper and lower parts, cutting across the long axis at a right angle to both the sagittal and frontal planes. Rotational movements, like rotating the head or the trunk of the body, take place in this plane.
All the chemical activities within a living thing are called, what?
Metabolism is the answer
A 12–volt car battery pushes a charge through the headlight circuit with a resistance of 8.5 ohms. How much current is passing through the circuit?
Answer:
1.41176471
Explanation:
r=v/I plug it into the formula
What two factors will most likely change the speed of a mechanical wave?
Speed of mechanical wave (sound wave) is given by the formula
[tex]v = \sqrt{\frac{E}{\rho}}[/tex]
here we can say that speed of sound wave depends on two factors
1). E = elasticity
2). [tex]\rho[/tex] = density
also we can have the string wave speed given by the equation as
[tex]v = \sqrt{\frac{T}{\mu}}[/tex]
here we can say it will depends on
1). T = tension in the string
2)[tex]\mu[/tex] = linear mass density
Also we will have the speed of sound in gases given as
[tex]v = \sqrt{\frac{\gamma RT}{M}}[/tex]
here it depends on two factors as
1). [tex]\gamma[/tex] = Type of gas
2). T = temperature of gas
The speed of a mechanical wave is predominantly determined by the medium through which it travels and the energy of the wave itself, which is dependent on its amplitude and frequency. Changes in these factors will result in changes in the speed of the wave.
Explanation:The two primary factors that can alter the speed of a mechanical wave are the characteristics of the medium through which it is traveling and the energy of the wave itself, which is related to its amplitude and frequency. For instance, the speed of sound waves can change when they travel from one medium to another, however the frequency typically remains constant. Therefore, if the speed changes but the frequency remains the same, the wavelength has to adjust accordingly.
For example, in a guitar, the strings vibrate to produce sound. The speed of the waves on the strings, along with the wavelength, determines the frequency of the sound that we hear. All strings may be made of similar material, but they have different thicknesses and thus, different linear densities. The linear density is defined as the mass per length, and can influence the speed of the wave.
Ultimately, waves are energy in motion and their speed can be affected by any change in the medium they travel through or the energy they carry.
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The SI units for measuring the velocity of the car: The SI units for measuring the acceleration of the car: The SI units for measuring force: The SI units for measuring mass:
Velocity ... m/s (meters per second) and angle
Acceleration ... m/s^2 and angle
Force ... Newton (kg-m/s^2) and angle
Mass ... kilogram
Answer:
The SI unit of velocity, acceleration, force and mass of the car are m/s, m/s², kg-m/s² and kg.
Explanation:
SI unit is the international system units.
We need to define the SI unit of velocity, acceleration, force and mass of the car
The SI unit of velocity is
[tex]v = m/s[/tex]
The SI unit of acceleration is
[tex]a = m/s^2[/tex]
The SI unit of force is
[tex]F = N=kg-m/s^2[/tex]
The SI unit of mass is
[tex]m =kg[/tex]
Hence, The SI unit of velocity, acceleration, force and mass of the car are m/s, m/s², kg-m/s² and kg.
What are the characteristics of a
unit?
Answer:
Two characteristics of a unit are:
It should be of convenient size.
It must be universally accepted i.e. its value must remain the same at all places and at all times.
What is one common way that a charge can accumulate on a object?
Answer:
Friction
Explanation:
Friction is rubbing two objects together. When this happens electrons from one object goes to the other. When one object loses electrons, it will have more protons, so it will be positively charged. When one object gains electrons it becomes negatively charged.
This is what happens when you rub a rubber balloon on your hair, or even on the wall. Because one will be negatively charged and the other positive, the objects then attract each other and they stick together, like what happens when you rub the balloon on your hair, you hair will stick to the balloon, or vice-versa.
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 4kg. The carriage has —— energy. Calculate it.
Answer:
E=252J
Explanation:
The total mechanical energy of an object or system is given by:
E mech=K+U
Where K is the kinetic energy of the object and U is the potential energy of the object. The carriage, sitting motionless at the top of the hill, has only potential energy in the form of gravitational potential energy.
Gravitational potential energy is given by:
Ug=mgh
Where m is the mass of the object, g is the gravitational acceleration constant, and h is the height of the object above some specific reference point, in this case the ground 21 m below.
The weight of a stationary object at the surface of the earth is equal to the force of gravity acting on the object.
W=→Fg=mg
We are given that the carriage weighs 12 N, therefore mg=12N.
Ug=12N⋅21m
⇒Ug=252Nm=252J
Hope it helped, God bless you!
The baby carriage at the top of the hill possesses gravitational potential energy. Using the formula for potential energy (PE = m x g x h) and given values for mass, gravity, and height, we find the energy of the carriage is 823.2 Joules. The carriage has gravitational potential energy.
Explanation:The energy of the baby carriage at the top of the hill is known as gravitational potential energy, which can be calculated using the formula PE = m x g x h where m is the mass, g is the acceleration due to gravity and h is the height above the ground.
In this case, the mass (m) is 4 kg, the gravitational acceleration (g) is approximately 9.8 m/s², and the height (h) is 21 m. Plugging these values into the formula gives us a potential energy (PE) of PE = 4 kg x 9.8 m/s² x 21 m = 823.2 Joules.
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A body of mass 10kg and initially at rest is subjected to a force of 20N for 1 second.calculate the kinetic energy during that time
Answer:
20 J
Explanation:
First find the acceleration:
F = ma
20 N = (10 kg) a
a = 2 m/s²
Now find the final velocity:
v = at + v₀
v = (2 m/s²) (1 s) + 0 m/s
v = 2 m/s
Now find the final kinetic energy:
KE = 1/2 mv²
KE = 1/2 (10 kg) (2 m/s)²
KE = 20 J
Prior to the industrial era, pre 1780 ___ affected earth climate because they emitter both aerosols and carbon dioxide into the atmosphere
A) sunspots
B) volcanoes
C) fossil fuels
D) meteorite impacts
Answer:
B. volcanoes
Explanation: Prior to the industrial era, volcanoes affected earth climate because they emitted both aerosols and carbon dioxide, sulfur dioxide into the atmosphere.When volcanic eruption take place they eject lava, sulfur dioxide, carbon dioxide, silica, ash, molten rock and dust. These gases makes the environment very dusty and polluted. These volcanic gases stays in atmosphere forever and affect the climate.
Answer: the answer is b volcanoes
Explanation:
A coffee maker uses 7 amps of current and 110 volts.
1. How much power does it use?
117 watts
770 watts
16 watts
103 watts
Power=Amperage *Voltage
P=I*V
7 amps*110 volts
770 watts
Answer: second choice
If you need 40.0 Nm of torque in order to loosen a nut on a wn
need 40.0 Nm of torque in order to loosen a nut on a wheel and a mechanic has a
maximum force of 133 N, how far from the nut must the mechanic apply the force
loosen it?
Answer:
0.301 m
Explanation:
Torque = Force × Radius
τ = Fr
40.0 Nm = 133 N × r
r = 0.301 m
The mechanic must apply the force 0.301 m from the nut.
This is a measure of resistance to motion, by an object.
Inertia is the physical property that describes an object's resistance to changes in motion, related to its inertial mass.
The measure of resistance to motion by an object is often referred to in Physics as inertia. Inertia is the property of an object that quantifies how much it resists a change in its state of motion. It is directly related to an object's inertial mass, which is a numerical measure of this resistance. When a force is applied to an object, the inertial mass determines how difficult it is to change the object's motion, whether the object is at rest or in motion.
In more detailed terms, rotational inertia (symbolized as I) is the resistance of an object to changes in its angular velocity. In electrical terms, resistance, commonly measured in ohms (Ω), is a measure of the opposition that a piece of wire, for example, offers to the flow of electricity. Both inertia and electrical resistance are foundational concepts in Physics that deal with how an object resists changes imposed upon it, either in terms of motion or electric current.
In summary, concepts such as inertia, inertial mass, and resistance are essential to understanding the motion of objects and the flow of electric current in physical systems. These concepts are also critical for measurements, which include figures like the kilogram for mass or ohms for electrical resistance.
an engine has a high temperature reservoir of 540K and a low-temperature reservoir of 350K. what is the maximum possible theoretical efficiency of this engine?
Answer:
35.2 %
Explanation:
The maximum possible theoretical efficiency of an engine is given by:
[tex]\eta=1-\frac{T_C}{T_H}[/tex]
where
[tex]T_C[/tex] is the low-temperature reservoir
[tex]T_H[/tex] is the hot-temperature reservoir
For the engine in this problem, we have
[tex]T_C = 350 K\\T_H=540 K[/tex]
Substituting into the equation, we find
[tex]\eta=1-\frac{350 K}{540 K}=0.352=35.2 \%[/tex]
Which is the average kinetic energy of particles in an object
Answer:
temperature
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The average kinetic energy of particles in an object is determined by the average energy of each particle due to its motion, which can be calculated using the equation K = 1/2*m*v². This energy is directly proportional to the particle's absolute temperature and can be influenced by changes in mass, velocity, or temperature.
Explanation:The average kinetic energy of particles in an object refers to the average amount of energy that each individual particle has due to its motion. This energy, denoted as K, can be calculated using the equation K = 1/2*m*V² where m is the particle's mass and V is its velocity. The kinetic energy of a particle is directly proportional to its absolute temperature.
For example, in the context of thermodynamics, an air molecule at room temperature (approximately 293 K) will have an average kinetic energy of (1.38 × 10-23 J/K)(293 K) = 6.07 × 10-21 J. Meanwhile, immediately following the Big Bang, when the universe's temperature was approximately 10³² K, the average thermal energy of a particle would have been 10¹⁹ GeV.
The average kinetic energy of particles in an object can vary based on factors such as changes in mass, velocity, or temperature. For example, in the image provided (Figure 11.4), the higher-temperature region contains particles with higher kinetic energy, while those in the lower-temperature region have lower kinetic energy. Collisions between particles can cause energy to transfer from higher-energy to lower-energy particles, thereby changing the average kinetic energy of the particles in the system.
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The connections of many simple pieces in the brain is evidence of the:
Brian’s Complexity Brian’s Complexity Brian’s Complexity Brian’s Complexity
Answer:
Brain's complexity
Explanation: In human body the most complex organ is brain. Its weight is around 1.4 kilograms and this jelly- like mass of tissue contains about billions of nerve cells. It forms a million new connections within seconds and its strength and pattern keeps changing. So no two brain are same. Personalities, memories, habits are the result of these changing connections.
on the surface of planet X, the acceleration due to gravity is 16 m/s^2. What is the weight of a 6.0 kg mass located on the surface of planet X?
Answer:
96 newtons is the weight of that 6 kg mass.
Explanation:
Weight equal to mass x acceleration
6 x 16
96 newtons
That 6 kg body feels that it have 9.6 kg mass. But actually not mass is constant overall universe and weight is a variable.
Weight is the product of mass and acceleration due to gravity. The weight of a 6 kg mass located on the surface of planet X is 98 N
Weight of an object is different in different planet due to differences in acceleration due to gravity. Since mass of a body is always constant.
The acceleration due to gravity on planet earth is approximately equal to 9.8 m/[tex]s^{2}[/tex]
To calculate the weight W of a body or any object, we multiply the mass m of the body with the acceleration due to gravity g of that planet. That is,
W = mg
From the given question, the parameter given are :
m = 6 kg
g = 16 m/[tex]s^{2}[/tex]
Substitute all the parameter into the formula
W = 6 x 16
W = 98 N
Therefore, The weight of a 6 kg mass located on the surface of planet X is 98 N
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What is the difference between conductor and insulator
Answer:
There are three types of material as per the condition of charge flow
1) Conductor
2) Insulator
3) Semiconductor
1) Conductors
As we know that conductors are those which offer very small resistance to the flow of charge
Resistivity of the conductors are very small
2) Insulators
These type of materials offer large resistance to the flow of charges and it will not pass the current through it
So resistivity of the insulators are large as compared to conductors
Which of the following accurately describes properties of valence? A. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. B. Metals tend to have a negative valence and tend to be electron borrowers. C. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. D. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.
Answer:
I've done this test a couple days ago and got a hundred. The answer you are looking for is C, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.
Explanation:
, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.
Why doesn’t a machine that increases force break the law of conservation of energy?
Answer:
A machine in which work input equals work output. energy can be used to do work, work can be used to transfer energy. The change in the kinetic energy of an object is equal to the net work done on the object.
hope this helps
What causes electric current in a wire
Answer:
The difference in potential at two points in a wire causes electric current in a wire.
Explanation:
Electric Current:
The flow of Electric charges is called Electric Current.
An electric current is said to exist when there is a net flow of electric charge through a region. In electric circuits this charge is often carried by electrons moving through a wire.
Electrons move in a wire from lower potential to higher potential because, positive charge attracts the negative charge and causes it to move towards itself.
The impulse given to a ball with mass of 4 kg is 28 N s. If the ball were already moving at 3 m/s what would the final velocity be? (Remember that v = Vfinal - Vinitial )
vf = 10 m/s. A ball with mass of 4kg and a impulse given of 28N.s with a intial velocity of 3m/s would have a final velocity of 10 m/s.
The key to solve this problem is using the equation I = F.Δt = m.Δv, Δv = vf - vi.
The impulse given to the ball with mass 4Kg is 28 N.s. If the ball were already moving at 3 m/s, to calculate its final velocity:
I = m(vf - vi) -------> I = m.vf - m.vi ------> vf = (I + m.vi)/m ------> vf = I/m + vi
Where I 28 N.s, m = 4 Kg, and vi = 3 m/s
vf = (28N.s/4kg) + 3m/s = 7m/s + 3m/s
vf = 10 m/s.
.
Which type of fault occurs when rock is subjected to this type of stress
Answer: normal fault
Explanation:
Answer: B) normal
Explaination: A normal fault the plates move away from the fault
How are step-up transformers used in the transmission of electrical energy?
A They decrease the voltage before it leaves a power plant.
B They increase the voltage for efficient long-distance transmission.
C They increase the current for efficient long-distance transmission.
D They increase the voltage and the current for a short distance
transmission
Answer:
B
Explanation:
Transformer is a device used to convert low a.c. voltage to high a.c. voltage and vice versa.
There is two types of transformer, they are:
1.Step up transformer
It converts low a.c. voltage into high a.c. voltage.
2.Step down transformer
It converts low a.c. voltage to high a.c. voltage.