A person runs around a semi-circle of
radius 10m. a) What is the person's
distance? b) What is the person's
displacement?

Answer:

Newton's Third Law of Motion

Explanation:

it explains that forces always come in action-reaction pairs. The Third Law states that for every action force, there is an equal and opposite reaction force

Answer:

newtons third law of motion

Explanation:

newtons third law of motion explains that forces always come in action-reaction pairs

Answer:

False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.

Explanation:

In order to move the fridge to the left, Dave would have to push with a force of at least 210 N to the left, in the opposite direction of the force that John is pushing in. This is because the two forces (John's pushing to the right and Dave's pushing to the left) must be of equal magnitude and opposite direction in order for the fridge to move in the desired direction.

The magnitude of Dave's pushing force must be equal to or greater than John's, which is 210 N. This is because forces in opposite directions cancel each other out; therefore, the net force acting on the fridge must be equal to or greater than the magnitude of John's pushing force, 210 N.

In order for the fridge to start moving initially, Dave's pushing force must be greater than zero. This is because for the fridge to begin to move, the net force acting on the fridge must be greater than zero. A pushing force of 210 N to the left by Dave is the minimum force required to make the fridge start moving to the left.

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Answer:

Explanation:

Givens

m = 15000 kg

t = 12.1 seconds

vi = 86 km / hr

vf =0

Formula

F = m*a

a = (vf - vi)/ t

vi has to be converted to m/s

86 km/hr [1000 m / 1 km] * [1 hour / 3600 seconds]

86 * 1000 / 3600 = 23.89 m/s

Solution

a = (vf - vi) / t

a = (0 - 23.89)/12.1

a = - 1.97 m/s^2 The minus means that the trains is slowing down.

F = 15000 kg * - 1.97 m/s^2

F = -29615.7 Newtons.

The force required to hold the nozzle in place is zero.

To find the force required to hold the nozzle in place, we can use the principle of conservation of momentum. Since the flow is steady, incompressible, and irrotational, we can apply Bernoulli's equation to the flow.
Bernoulli's equation states that the sum of the pressure, kinetic energy, and potential energy per unit volume is constant along a streamline. In this case, since the fluid discharges to the atmosphere, we can assume that the potential energy per unit volume is the same at both the inlet and outlet of the nozzle.
Now, let's consider a control volume around the nozzle. The force required to hold the nozzle in place is equal to the change in momentum of the fluid as it passes through the control volume.
The momentum change can be calculated as the product of the density (ρ), velocity (u), and the change in velocity (Δu) across the nozzle. Since all flow properties are uniform across the nozzle, the change in velocity is zero, and hence, the force required to hold the nozzle in place is zero.
In other words, no external force is needed to hold the nozzle in place as the pressure and velocity are balanced due to Bernoulli's equation. Therefore, the force as a function of ρ, u, and d required to hold the nozzle in place is zero.
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Answer:

Describe the limitations in detail in their final report

Explanation:

just did test

The heat radiating out of the pot will be increased by a factor of 16 when compared to the room temperature.

The quantity of heat transported is related to the temperature differential between the objects as well as the object's heat capacity. The heat capacity is a constant that indicates how much heat is added with each unit temperature rise.

The Stefan-Boltzmann equation of radiation governs the rate of heat transfer by emitted radiation.

q = σT⁴A

where q is the amount of heat radiated per second, σ is the Stefan-Boltzmann Constant, T is the absolute temperature, and A is the surface area.

When the absolute temperature doubles, q grows by a factor of 2⁴ = 16.

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Complete question - A clay pot at room temperature is placed in a kiln, and the pot\'s temperature doubles. how much more heat per second is the pot radiating when hot compared to when cool?

Answer:

D. Exothermic, because energy is being absorbed from the surroundings

Explanation:

This is true about the Exothemic reaction due to the fact that, the reaction occurs outside the body. During this reaction, the energy being absorbed from the surrounding environment will hit the body surface thereby creating the coldness due to the heat given out from the body  being minimal.

Answer:

Endothermic, because energy is being absorbed from the surroundings.

Explanation:

If something is moving anticlockwise, it is moving in the opposite direction to the direction in which the hands of a clock move.

The terms clockwise and anti-clockwise are used to indicate the direction of a turn. So, which direction is clockwise is Clockwise is a turn to the right that follows the direction of a clock’s hands, while anti-clockwise is a turn to the left that opposes the direction of a clock’s hands.

We can detect which way the vector is heading by computing the dot product of (0,0,1). If (ab)(0,0,1) > 0, the points are anticlockwise. If (ab)(0,0,1)0, the points are arranged clockwise. If the vectors are same, they are parallel to one other. The loading is statically identical to the load FC applied at the beam’s center, plus a clockwise moment of magnitude FCt/2 and an anticlockwise moment of magnitude FCt/2.

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Answer:

Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds.

Answer:

mass 3 has the least slope therefore the mass is the greatest.

Force is the product of mass and acceleration. Here the acceleration is constant for all bodies and force is different. The greater the force, greater will be mass. Thus, mass 1 is the largest.

Force is an external agent acting on a body to deform it or to change its state from motion or rest. There are different kinds of forces such as magnetic force, nuclear force, gravitational force etc.

According to Newton's second law of motion, the force acting on a body is the product of its mass and acceleration. Thus, greater the mass of the body, greater force is required to accelerate the body.

In the given figure the acceleration is increasing for all bodies, the mass which is associated with greater force is the largest. Here the greater force is associated with mass 1. Hence, mass 1 is the largest.

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Answer:

See below

Explanation:

Distance traveled = 15 + 30 = 45 km

Displacement (use Pythag theorem)

    15^2 + 30^2 = d^2      d = sqrt (1125) = 33.5 km

In order to call a death a homicide, we must find the following facts to be true, a human being who was once alive is now dead, and, the death was caused by the act of another human being.

If a human being who was once alive is now dead, but the death was not caused by the act of another human being, the death is not a homicide. Although it is not ordinarily difficult to determine that a homicide victim was a human being and was once alive, certain circumstances can complicate the determination.

The criminal law does not recognize fetuses as human beings for purposes of criminal homicide (since the death of a fetus is the subject matter of the law of abortion and feticide).

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When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.

Stars are present in the galaxy that have the ability to generate their own light. They are both quite hot and very huge.

They are largely formed of hydrogen, with a trace of helium thrown in for good measure.

The sun is also a star, and its energy and light play an important part in the survival of all kinds of life on Earth.

When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.

Hence the correct answer is a neutron star.

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Answer:

Below

Explanation:

The vaulter's entire KE will be converted to PE to clear the bar (5-.9) = 4.1 m above the COM.

PE required = mgh = 70 ( 9.81)(4.1) = 2815.5 J

KE required will then be   2815.5  J

(As an aside:  = 1/2 mv^2 = 2815.5 = 1/2 ( 70)(v^2)   shows v = 9  m/s)

The distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.

The distance the piston must be pushed down is calculated as follows;

A₁d₁ = A₂d₂

πr₁²d₁ = πr₂²d₂

r₁²d₁ = r₂²d₂

(1)²(d₁) = (4.5)²30

d₁ = 607.5 cm

Thus, the distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.

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Answer:

2ms^2

Explanation:

A = 2000 divided by 1000

A= 2

In a gym the students raced with each other and teacher is recording everyone's speed than the second graph is representing correctly.

A graph is a visual depiction of statistical data or a logical relationship between variables. Graphs serve a predictive purpose because they have the virtue of displaying broad trends in the mathematical behavior of data. However, as just approximations, they may be incorrect and occasionally deceptive.

Most graphs have two axes, with the axis denoting a set of independent variables and the vertical axis denoting a set of dependent variables. The most typical graph is indeed a broken-line chart, where the regression coefficient is typically a factor of duration.

In the second graph the speed of every student is represented accurately, therefore the second graph is correct.

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The lead nucleus doesn't burst apart because the strong nuclear force holds the nucleus together. The correct option id d.

The protons in a nucleus all have a positive charge, which creates a strong Coulomb repulsive force between them. This force would normally cause the nucleus to burst apart, as the protons repel each other.

However, the strong nuclear force is also at work inside the nucleus. This force is stronger than the Coulomb force and holds the nucleus together. The strong nuclear force acts between the protons and neutrons in the nucleus, and it is able to overcome the repulsive Coulomb force because it operates over a very short range, typically only a few femtometers.

The strong nuclear force is a result of the exchange of particles called mesons between the protons and neutrons in the nucleus. In summary, the strong nuclear force overcomes the repulsive Coulomb force and holds the lead nucleus together. Option d is the correct answer.

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The curve that is required by the question have been shown in the image attached.

You can draw an activity sketch on your answer sheet to show the path a ball takes during a free kick and how to score a goal. Here is a detailed instruction:

On your response sheet, start by tracing a field or a goal post. You can represent the field with simple shapes like rectangles and the goal post with a smaller rectangle.

Next, make an arrow to depict the free kick's direction. The goal post should be where the arrow points.

Starting at the ball's original location, draw a curving line that follows the ball's route as it flies into the air. The path taken by the ball is shown by this curved line.

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Answer:

Explanation:

What is the value of a in the function's equation?

A. -2

B. -3

C. 3

D. 2

ANSWER: c.

Answer:

False

Explanation:

The internet uses various mediums (fibre optic being only one of the newer ones) to transfer information.

In the system, kinetic energy from the moving water of the faucet turns the turbine. The Mechanical energy of the spinning turbine generates Electrical energy which is transformed into Thermal energy that causes the temperature of the water to increase. The water then becomes steam and gives off more Thermal energy into the atmosphere.

The mechanical energy spend on the turbine to spin would generate electrical energy. This electrical energy then converts the moving electric charge into thermal or heat energy. The heat would convert water to steam.

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Answer:

Yeah ice floats on water.

Observation

Example in those areas were ice is found like Antarctica ice is found on top of water.

The change in length of the bridge between the coldest and hottest days is approximately 31.392 centimeters.

To calculate the change in length, we can use the formula: ΔL = α * L0 * ΔT, where ΔL is the change in length, α is the coefficient of linear expansion, L0 is the initial length, and ΔT is the temperature difference. Plugging in the values: α = 12.0 x 10^-6/K, L0 = 148.0 meters, and ΔT = 41.0°C - (-29.0)°C = 70.0°C, we can calculate ΔL as follows: ΔL = (12.0 x 10^-6/K) * (148.0 meters) * (70.0°C) = 0.12408 meters. Converting to centimeters, the change in length is approximately 31.392 centimeters.

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Answer:

1 I am not sure but I tried

Answer:

7.5 Ω

Explanation:

Voltage = Current x Resistance

(V = IR)

240 = 32 R

R = 240 / 32

= 7.5 Ω

Answer:

C. 157 bar/2270 psi

Explanation:

Calculation to determine what we should head back when either of our SPGs read

SPGs=200 bar -[200 bar-(50 bar + 20 bar)]÷1/3]

SPGs=200 bar-[(200 bar-70 bar)÷1/3]

SPGs=200 bar-(130 bar÷1/3)

SPGs=200 bar-43 bar

SPGs=157 bar/2270 psi

Therefore based on the above calculation we should head back when either of our SPGs read 157 bar/2270 psi

Answer:

I would assume that the box slows down due to the frictional force between the floor and the box. In addition, the frictional force points opposite of the boxes motion. As we know, the box was given an initial speed, therefore, having an applied force. Hence, we can conclude that  the frictional force opposing the motion of the crate is equal to the applied force but acting in the opposite direction. This frictional force is called static friction. When we increase the applied force (push harder), the frictional force will also increase until it reaches a maximum value.

Hope that helps!

Answer:

54 N

Explanation:

a= v/t

3÷5/3= 1.8 m/s^2

f=ma

1.8 x 60 = 108/2 = 54 N

The work done against the braking force is the change in the kinetic energy of the skater is 54 N.

Work is said to be done whenever a force moves an object over a distance.

\(W = F = ma\)

where

Acceleration is given by

\(a = v/t\)

\(a = \frac{3}{5/3}\)

\(a = 1.8 m/s^2\)

Work is

\(W = ma\)

\(W = 60*1.8 m/s^2\)

\(W = 54 N\)

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