What is momentum Mcq?

Answer:

To solve this problem, you can use the principle of transverse static equilibrium. This states that the sum of the forces acting on an object must be equal to zero for the object to be in equilibrium. In this case, the forces acting on the rod are the tension in the strings, the weight of the rod, and the weight of the masses hung on the rod.

First, you can find the weight of the rod by multiplying its mass by the acceleration due to gravity:

Wrod = mrod * g

= 0.7 kg * 9.8 m/s^2

= 6.86 N

Next, you can find the weight of the 4.0-kg mass by multiplying its mass by the acceleration due to gravity:

W1 = m1 * g

= 4.0 kg * 9.8 m/s^2

= 39.2 N

You can find the weight of the 2.0-kg mass in the same way:

W2 = m2 * g

= 2.0 kg * 9.8 m/s^2

= 19.6 N

To find the tension in the strings, you can use the principle of transverse static equilibrium. The forces acting on the rod are the tension in the strings, the weight of the rod, and the weight of the masses hung on the rod. You can represent these forces as vectors acting at the points where the strings are attached to the rod. The vectors representing the tension in the strings will be equal in magnitude but opposite in direction. The vectors representing the weight of the rod and the masses will act vertically downward.

[asy]

unitsize(2cm);

pair P1, P2, P3, P4;

P1 = (0,0);

P2 = (1,0);

P3 = (0.8,0);

P4 = (0.2,0);

draw((-1,0)--(2,0));

draw((0,-1)--(0,1));

draw(P1--P3,red,Arrow(6));

draw(P2--P4,red,Arrow(6));

draw(P3--P4,red,Arrow(6));

draw((P1)--(P1+(0,-0.7)));

draw((P2)--(P2+(0,-4)));

draw((P2)--(P2+(0,-2)));

label("$T_1$", (P1 + P3)/2, red);

label("$T_2$", (P2 + P4)/2, red);

label("$W_{rod}$", (P3 + P4)/2, red);

label("$W_1$", (P2 + P4 + (0,-4))/2, red);

label("$W_2$", (P2 + P4 + (0,-2))/2, red);

label("$12$ cm", (0,0.2), red);

label("$20$ cm", (0.4,-0.4), red);

label("$25$ cm", (0.75,-0.4), red);

[/asy]

The sum of the forces in the x-direction must be equal to zero, so you can set up the following equation:

T1 - T2 = 0

The sum of the forces in the y-direction must also be equal to zero, so you can

Explanation:

Starburst galaxies have the highest rates of star formation.

Central dominant galaxies are the ones which are largest individual galaxies in the universe.

The collective activity of many supernova events in a relatively small volume of a galaxy can create galactic wind.

The energy for all active galactic nuclei is thought to come from in-fall of matter into supermassive black holes.

Radio galaxies are often characterized by sources of immense energy located hundreds of thousands of light-years away on either side of their centers.

The volume of air in the room. The volume of the room is given by the product of its length, width, and height=  18.015 g/mol.

Volume of air = 5.0 m × 9.0 m × 2.4 m = 108 m^3

Next, we need to find the number of moles of water vapor present in the air at 85% of the vapor pressure of water at 30°C.

The vapor pressure for water at 30°C is 31.8 torr. At 85% of this value, the vapor pressure of water in the air is:

Vapor pressure in air = 0.85 x 31.8 torr = 27.03 torr

We can use the Ideal Gas Law, PV = nRT, to find the number of moles of water vapor present in the air.

P = 27.03 torr

V = 108 m^3

R = 8.314 J/mol·K (The universal gas constant)

T = 303 K (Temperature in kelvins)

n = (PV) / (RT)

mass of water = n * M(H2O)

Where M(H2O) is the molar mass of water which is 18.015 g/mol. It is important to note that this calculation assumes that air behaves as an ideal gas and that the temperature and pressure remain constant throughout the room. In reality, the temperature and pressure may vary throughout the room and the process of removing water vapor from the air can also affect the temperature and pressure.

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Two physics concepts that interact with one another to keep a satellite in orbit are the gravitational force and the centrifugal force.

The apparent outward force that a rotating mass experiences is known as centrifugal force. Imagine a ball being whirled around on a string or the outward motion you experience when driving around a curve. Since the system is not rotating in an inertial frame, there is no outward acceleration. The ball or your body just continues to go in the same direction that they did at first. However, they seem to be accelerating away in the rotating reference frame of the string or the car. The direction of centrifugal force is always outward and away from the axis because the Earth revolves around a fixed axis. Thus, in the equator and at the poles of the Earth, it is the opposite of the direction of gravity.It is zero at the poles of the Earth.

One of the four fundamental forces of the universe is gravity. A centripetal force is necessary in nonlinear motions like the planetary motion. In the study of disciplines like astronomy, physics, space exploration, cosmology, and many others, both of these forces are crucial.

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Answer:

hlfzuprsuo4sljfxuptdpi5ekcg

Statement D. They have sufficient gravity to make themselves round accurately describes a similarity between all planets in terms of this movement and the presence of mass to form such a celestial body.

All planets need to have gravity in order to orbit around major celestial bodies, i.e., stars such as in the case of the earth planet or Mars, they orbit around the Sun which is the star of the solar system. The presence of the attractive force of gravity allows planets to move in a cycle across their stars.

Therefore, with this data, we can see that all planets have gravity and orbit around major celestial bodies and thus they can be considered to share the particularity to have a well defined orbit due to the presence of mass.

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Answer:

the two factors are the mass of the objects and the coefficient of friction between them

Explanation:

internet :)

Answer:

cell wall hope this will help

Answer:

You can not find out an answer with this information

Explanation:

Provide some sort of graph

Answer:

Hey I would say Dust

hope this helped

Answer:

The answer is A/Dust

Explanation:

(a) The charge carrier density doubles,(b) The current density doubles, (c) The electron drift velocity doubles, (d) The average time interval between collision halved.

I = nq[tex]v_{d}[/tex]A

where n is the charge/volume

I is the current.

q is the charge per carrier

[tex]v_{d}[/tex] is the drift velocity of the charge carriers

A is the cross-sectional area of current flow

Here,

a) The charge carrier density (n) doubles if I doubles.

b) The charge carrier density (J = I/A is the current density).  If I doubles, J doubles.

c)  The electron drift velocity ([tex]v_{d}[/tex]) doubles if I doubles.

d)  The average time interval between collisions depends inversely on [tex]v_{d}[/tex].  If I doubles, [tex]v_{d}[/tex] doubles, so the average time between collisions is halved.

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The average speed of the car is 24 m/s. The average speed of the car is therefore below 25.0 m/s.

The description of rapidity. a change in the location of an object in either direction or speed. How fast something is going is determined by the distance travelled and the time required to cover that distance. Speed is a scalar quantity since it just has an arrow-like direction and no magnitude.

The entire movement of an item, independent of direction, is called distance. Distance may be characterized as the quantity of ground covered, regardless of the starting or finishing points of an item.

distance (d) = 9 miles = 14.4841 km

d = 14484.1 m

1 miles = 1609.34 m

t₁= 14484.1/ 20

 = 724.2 sec

t₂= 14484.1/ 30= 482.8 sec

total time ( t) = t+t

t= 724.2+ 482.8 = 1207 sec

Vavg = 2d/t= 2*14484.1/1207

Vavg = 24m/s

24< 25

lessthan 25m/s

car average speed (Vavg) = 24 m/s.

Therefore, the car average speed is 24 m/s.

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According to the given information the velocity is .0148 m/s2 and the kinetic energy is 3.78 J.

The movement that an item or particle experiences with regard to time is expressed vectorially as velocity. One metre per second (m/s) is the accepted unit of flow speed (also known as speed).

The metric speed unit is the meter per minute (m/s). A different way to express velocity magnitude is in centimeters per second (cm/s).

vilocity = 5/(5.8×5.8)

            = 0.148

kinetic energy = 1/2mv^2

                        = 1/2 × (0343 × 0.148×0.148)

                        = 3.78 J

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Answer:

position 3

Explanation:

in position 3 PE is least as height is least

so KE is most as energy is always conserved

If a circular motion is accelerated, it will undoubtedly have a high Turning at a rapid rate.

When an object travels along a circular path at a constant speed, it is said to be in uniform circular motion (UCM).So because object's direction was constantly shifting, the velocity doesn't really remain constant along with the speed.To maintain a circular course, the object must speed up toward the the circle's center.

As the particle moves in a circle, its direction of acceleration is continuously changing since it is continually moving toward the center.As a result, it is variable.

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Answer:

The Answer is (B)

Explanation:

The velocity of the hammer of mass 1.9 kg is 11.07 m/s.

Velocity is the rate of change of displacement.

To calculate the velocity of the hammer, we use the formula below.

Formula:

Where:

Substitute these values into equation 1

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The piece of sausage need to make 55 pizza is 21 × 55 = 1155.

The typical baking time for a pizza is 8 to 15 minutes, and larger, thicker pizzas bake more slowly than thin-crust, petite pizzas with few toppings. Just a friendly reminder: never lose sight of the pizza.

The "2 pizza rule" is a formula for determining how many people to invite to a gathering. Every meeting had to be small enough for two large pizzas to feed everyone, according to the rule.

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Answer:

The geological features that is not created by the movement of the Earth's plates is Canyons.

Ranking each of the following from least to greatest in terms of the amount of momentum each possesses:

A 5 kg object moving at -25 m/s < A 100N object moving at 5 m/s < A 10kg object moving at 10 m/s < A 30 kg moving at 5 m/s

Momentum is the product of a particle's mass and velocity. The fact that momentum is a vector quantity means that it has both magnitude and direction. The force pushing a particle has an equal-and-opposite impact on the speed at which its momentum changes, according to Isaac Newton's second law of motion. Take a look at Newton's laws of motion.

Newton's second law states that if a particle experiences a constant force for a predetermined period of time, the impulse—which is equal to the force multiplied by the duration—will equal the change in momentum. The amount of time required for a consistent force to bring a particle to rest, in contrast, is measured by a particle's momentum.

We know that momentum, p = mv

Where,

p = momentum

m = mass

v = velocity

Substituting the value in formula we get,

1. A 10kg object moving at 10 m/s

p = 10 × 10

  = 100 kg⋅m/s

2. A 30 kg moving at 5 m/s

p = 30 × 5

  = 150 kg⋅m/s

3.  A 5 kg object moving at -25 m/s

p = 5 × -25

  = -125 kg⋅m/s

4. A 100N object moving at 5 m/s

p = (100 × 0.10197 kg) × 5

  = 10.197  × 5

  = 50.985 kg⋅m/s

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The ball requires a total of zero work to go to the right at 24 m/s.

Take into account the ball's kinetic energy.

Vi = -24 ms-1 for the initial velocity

Final velocity: vf = +24ms⁻¹

K = 12mvf²- 12mvi² = 12m(vf² - vi²) = 12m(242 - 242) = 0,

meaning that the ball does not undergo any effort.

As an alternative, think about the effort made to stop the ball.

W1 = ½m(0 – 24²) = 0.5 × 0.06 × –576 = –17.28J

Work required to accelerate the ball from rest to +24 milliseconds per second was W2 = 12m(242 - 0) = 0.5 0.06 576 = +17.28 J.

Therefore, the sum of the work is W = W1 + W2 = -17.28 + 17.28 = 0 J.

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Alright, I'll try my best and see what I can do to help you.

The correct answer is D) Before the mechanic left, the molecules were moving in place. When she returned, they were moving around each other. The change in phase from solid to liquid is due to a change in the motion of molecules.

Molecules are formed when two or more atoms come together and form a chemical bond. Molecules exist in all forms of matter and are the building blocks of all living organisms. Molecules can range in size from the very small, such as hydrogen, to the very large, such as proteins. Generally, molecules are composed of two or more atoms of the same element or different elements that are held together by chemical bonds. Molecules can also be composed of multiple subatomic particles, such as protons and neutrons, which form the nucleus of an atom. Molecules may also contain electrons, which are held in orbit around the nucleus by electrostatic forces. Molecules can have different shapes depending on the arrangement of their constituent atoms. Molecules are essential to all forms of life, as they are responsible for many of the physical and chemical processes that take place in living organisms.

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The amount of effort force applied by Diana if this was an ideal machine is 250 N.

The load is typically divided by the number of ropes to determine the effort. The mass must be divided by the quantity of ropes.

Hours per person, days, weeks, or something else could be your unit of work. (If you are using a scrum-based project approach, you may have chosen to assess effort in relative terms, using points (story points), in which case you can omit any information in the Effort fields.)

For instance, when using a shovel, you keep one end steady to serve as the fulcrum and use the other hand to pull up on a load of dirt. The dirt being scooped up is the resistance force, and the second hand is the effort force.

Given:

Load force = 1000 N

Load distance = 5.00 m

Effort distance = 20.0 m

For ideal machine,

Effort force × Effort distance = Load force × Load distance

[tex]Effort force= \frac{1000*5.00}{20.0}[/tex]

Effort force = 250N

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If friction is neglected, at any given instant both objects will have the same c) Height.

Friction is the resistance to motion that results from two objects rubbing against one another. Two objects rubbing against one another causes friction. Motion is opposed by friction, which works against the motion.

When an object slides over another object, friction slows it down. As a result, energy is used. However, the energy does not fade away. Kinetic energy, also referred to as moving energy, is transformed into heat energy. We rub our hands together when it's cold because of this. Rub them together, and friction and heat will result.

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As a result, the amount of force the truck exerts on the automobile is equal to the amount of force the truck exerts on the car.

As per Newton's third law of motion

If object A applies a force to object B, then object B must apply a force to object A in the opposite direction and of equal strength. This rule illustrates a symmetry in nature whereby forces always occur in pairs and that no body can exert a force without also being subjected to one.

Because the accident is a head-on collision, according to Newton's third law, both the automobile and the truck will exert equal force against one another.

As a result, it will be safe to ride in the truck since the automobile will accelerate more quickly under the same force due to its lighter weight. Bigger acceleration results in a greater change in velocity, which increases the driver's workload.

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The acceleration of the particle at t=0 is zero because the particle is in rest position and did not moving at any of the instance or travelling at an uniform speed through out the whole journey or yet did not start from the source point.

Acceleration is the rate of change of velocity. At any point on a trajectory, the magnitude of the acceleration is given by the rate of change of velocity in both magnitude and direction. Acceleration of the body that we can consider is the increasing value of the velocity of any object at a constant rate and that of wee can calculate. Hence by the primary information that we have we can formerly consider that the acceleration which is acting on the particle at t=0 is zero because the particle is in rest position and did not moving at any of the instance or travelling at an uniform speed through out the whole journey or yet did not start from the source point.

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Answer:

Exposure occurs when a person comes into contact with hazard

The amount of energy stored in a battery is measured in watt-hours (Wh), kilowatt-hours (kWh), or ampere-hours (Ah) (Ahr).

Potential energy is stored energy that is affected by the relative position of various components of a system. When a spring is squeezed or extended, its potential energy increases. A steel ball has higher potential energy when lifted above ground than when it falls to Earth.

Because every item moved from its resting posture has stored energy, it is referred to as potential energy because it has the ability to accomplish work when released.

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The probability that a particular nucleus of Element A will decay between 5 and 10 hours is 0.7, and the probability that a particular nucleus of Element A will decay between 5 and 20 hours is 0.9.

What is nucleus?

Nucleus is a fundamental subatomic particle which is present in the atoms of all chemical elements. It is composed of protons and neutrons and is the heaviest and most densely packed constituent of atoms. It is the core of an atom, and it is the positive charge that attracts the electrons, which are negatively charged particles. The nucleus is surrounded by a cloud of electrons which determine the properties of the atom and its chemical behavior. The size of the nucleus is typically around one hundred-thousandth of the diameter of the atom. It is held together by strong nuclear forces and has a diameter of around 10-15 femtometers.

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The probability that a particular nucleus of Element A will decay between 5 and 10 hours is 1/2 and the probability that a particular nucleus of Element A will decay between 5 and 20 hours is 7/8.

The total number of identical nuclei present in the nucleus affects how likely it is that the nucleus will disintegrate per second in a radioactive sample. Each nucleus breaks down on its own, regardless of any external factors. Consequently, the likelihood of nuclei disintegrating is the same.

The expression for the disintegration equation is given by

N(t) = N₀[tex]e^{-\lambda t}[/tex]            .... (1)

The half-life of the particle for 5 hours is given by

N(5) = N₀/2

Substitute in equation (1) to get

N₀[tex]e^{-\lambda t}[/tex] = N₀/2

[tex]e^{-\lambda t}[/tex] = 1/2

λ = ln2/5

The half-life of a particle for 10 hours is given by

N(10) = N₀/4

N₀[tex]e^{-\lambda t}[/tex] = N₀/4

[tex]e^{-\lambda t}[/tex] = 1/2

λ = ln4/10

The probability of disintegration is given by:

P = N(5) - N(10)/N(5)

Substitute the values, to get

P = (N₀/2 - N₀/4)/(N₀/2)

= (N₀(2-1)/4)/ N₀(1/2)

= 1/2

The probability of element decay between 5 to 10 hours is 1/2.

Now, the half-life of a particle for 20 hours is given by

N(20) = N₀/16

N₀[tex]e^{-\lambda t}[/tex] = N₀/16

[tex]e^{-\lambda t}[/tex] = 1/16

λ = ln16/20

The probability of disintegration is given by:

P = N(5) - N(1\20)/N(5)

Substitute the values, to get

P = (N₀/2 - N₀/16)/(N₀/2)

= (N₀(8-1)/16)/ N₀(1/2)

= 7/8

The probability of element decay between 5 to 20 hours is 7/8.

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