A student applies a force to a cart to pull it up an inclined plane at constant speed during a physics lab. A force of 20.8 N is applied parallel to the incline to lift a 3.00-kg loaded cart to a height of 0.450 m along an incline which is 0.636-m long. Determine the work done upon the cart and the subsequent potential energy change of the cart. PSYW

Your driver's license is at risk of being cancelled if you have more than three traffic violations in one year​. The correct option is D.

The license by the central government to an individual to travel on road by his own vehicle on terms and conditions to be strictly followed.

When a driver is moving with his vehicle and come across the traffic signal, he must follow them. If he violates the traffic signals more than three times, he will get his license cancelled.

Thus, your driver's license is at risk of being cancelled if you have more than three traffic violations in one year​. The correct option is D.

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Answer:true

Explanation:

Explanation:

Even though the man exerts force on the wall, the wall doesn't move . Work done= Force applied* displacement and since the displacement of the wall is zero., work done is also zero.

Answer: 5.5 hours

Explanation: 44/8=5.5.

Answer:

5.5 Hours at 8mph to go 44 miles

Explanation:

d=s/t

t=s/d

44/8 = 5.5  time it took 5.5 hours it will take him to ride 44 miles

Answer:

joule

Explanation:

hop it helps give a good rate ples

Answer:

joule

Explanation:

Answer:

650N

Explanation:

f = ma

130kg x 5 m/s^2 = 650N

Answer:

When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.

Three subsampling techniques commonly used in video compression are: 4:2:0 subsampling, 4:2:2 subsampling and 4:1:1 subsampling.

4:2:0 subsampling: This technique reduces the resolution of the chrominance (color) components by sampling them at half the rate of the luminance (brightness) component. It achieves a compression ratio of 2:1.

4:2:2 subsampling: In this technique, the chrominance components are sampled at half the rate of the luminance component horizontally, but at full resolution vertically. It achieves a compression ratio of 2:1.

4:1:1 subsampling: This technique samples the chrominance components at one-fourth the rate of the luminance component horizontally. It achieves a compression ratio of 4:1.

In the H.264 baseline profile, the subsampling scheme employed is 4:2:0.

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The components of the vector v are given as:

where v is the magnitude of the vector and theta is the angle.

In this case we have v=253 and theta=55.8°, plugging this values into the y component we have:

Therefore the y component is 209.25 meters.

The speed at the bottom is 10 m/sec.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

I have a 10kg crate on top of a ramp that has a 30m long surface and rises 5m in the air. If the μk is .05,

work = change in kinetic energy

mgh = 0.5 mv²

10*10*5 = 0.5 * 10 * v²

v = 10 m/sec

The speed at the bottom is 10 m/sec

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The angle necessary to keep a 10 kg box motionless, given a coefficient of static friction of 0.55 between the box and the ramp, is 33.4°, which corresponds to Option A.

To determine the angle, we can use the relationship between the coefficient of static friction, the angle of the incline, and the gravitational force acting on the box. The maximum static friction force can be calculated using the formula:

Friction force = coefficient of static friction * Normal force

The Normal force can be found by decomposing the gravitational force acting on the box into components parallel and perpendicular to the incline. The perpendicular component (Normal force) is equal to the weight of the box (mass * gravitational acceleration).

Since the box is motionless, the friction force must be equal to the component of the gravitational force acting parallel to the incline:

Friction force = Component of weight parallel to incline

By substituting the given values and solving for the angle, we find:

coefficient of static friction = tan(angle)

angle = arctan(coefficient of static friction)

angle = arctan(0.55) ≈ 33.4°

Therefore, the correct answer is Option A, 33.4°.

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The total torque created by the two known masses is 1.848 Nm.

We can use the formula for torque, which is given by:

τ = F x r x sin(θ)

where τ is the torque, F is the force applied, r is the distance from the pivot point to the point where the force is applied, and θ is the angle between the force and the lever arm.

For the first mass (193.1 g), the force applied is the weight of the mass, which is:

F1 = m1 x g = 0.1931 kg x 9.81 m/s^2 = 1.893 N

The distance from the pivot point to the point where the force is applied is half the length of the meter stick, which is:

r1 = L/2 = 0.5 m

The angle between the force and the lever arm is 90 degrees, so:

θ1 = 90 degrees

Using these values, we can calculate the torque created by the first mass as:

τ1 = F1 x r1 x sin(θ1) = 1.893 N x 0.5 m x sin(90 degrees) = 0.9465 Nm

For the second mass (183.9 g), we can follow the same procedure and find:

F2 = m2 x g = 0.1839 kg x 9.81 m/s^2 = 1.803 N

r2 = L/2 = 0.5 m

θ2 = 90 degrees

τ2 = F2 x r2 x sin(θ2) = 1.803 N x 0.5 m x sin(90 degrees) = 0.9015 Nm

The total torque created by the two known masses is the sum of these individual torques, which is:

τtotal = τ1 + τ2 = 0.9465 Nm + 0.9015 Nm = 1.848 Nm

Therefore, the total torque created by the two known masses is 1.848 Nm.

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Snell's law depends not only on the refractive indexes of the materials but also on the "angle of incidence" and "angle of refraction" of the light rays.

Snell's law describes the relationship between the angles of incidence and refraction when light passes through the interface between two different materials. It states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the refractive indexes of the two materials.

Mathematically, Snell's law is expressed as:

n₁ * sin(θ₁) = n₂ * sin(θ₂),

where n₁ and n₂ are the refractive indexes of the first and second materials, respectively, and θ₁ and θ₂ are the angles of incidence and refraction, respectively.

Therefore, the accurate determination of the angles of incidence and refraction is crucial for applying Snell's law to analyze the behavior of light as it passes through different media.

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Answer:

The answer is C 0.25s

Explanation:

T=60/15

T=4

p=1/T

P=1/4

P=0.25s

B) The statement is false. The mass of the fully fueled space shuttle is not 16 times its empty mass.

While the space shuttle does carry large amounts of fuel, the increase in mass due to fuel is not as significant as implied in the statement.

The space shuttle is designed to carry both its own weight and the weight of the fuel required for its mission. However, the mass of the fuel is not equal to 16 times the empty mass of the shuttle. The actual ratio of the fully fueled mass to the empty mass depends on various factors, including the specific mission requirements and payload.

Fuel is necessary for the space shuttle to achieve and maintain orbit. Once in space, the shuttle uses its engines to counteract the gravitational pull of the Earth and stay in orbit. However, the amount of fuel needed is carefully calculated to optimize the shuttle's performance and achieve the desired mission objectives. Carrying excessive fuel would increase the mass and operational costs of the shuttle without providing significant benefits.

Therefore, while the space shuttle does carry a considerable amount of fuel, it is not accurate to say that its fully fueled mass is 16 times its empty mass.

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The electronic usage cost in 1 month is 21.6 cents.

The cost of electronic usage depends on the power of electronic devices. Power is the energy dissipated because of resistance. The magnitude of power is proportional to current and voltage. It can be determined as

P = I . V

where P is power, I is current and V is voltage.

The electrical energy can be calculated by using

E = P . t

where E is energy and t is time.

From the question above, we know that

P = 1.2 kW

cost = 9 cents/ kWh

t = 4 min = 4/60 hour

Find the energy consumed per day

E = P . t

E = 1.2 kW . 4/60

E = 0.08 kWh

Find the energy consumed per month

total energy = E x 30

total energy = 0.08 x 30

total energy = 2.4 kWh

Calculate monthly electronic cost

monthly cost = total energy x cost

monthly cost = 2.4 x 9

monthly cost = 21.6 cents

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Answer: The force produced by piston B is 0.006 N.

Explanation:

No problem! We can convert the area of piston B to square meters to make the units consistent:

Area of piston B = 0.1 cm^2 = 0.1 x (0.01 m/cm)^2 = 0.00001 m^2

Now we can use the formula:

pressure = force/area

For piston A, we have:

pressure = 6 N / 0.01 m^2 = 600 Pa

So the pressure in the liquid is 600 Pa.

To find the force produced by piston B, we rearrange the formula:

force = pressure x area

Using the pressure we just found and the area of piston B, we get:

force = 600 Pa x 0.00001 m^2 = 0.006 N

So the force produced by piston B is 0.006 N.

The magnitude of the weight of the disk is greater than the magnitude of the tension force of the string. ((c) \(F_{T} < F_{g}\))

A rigid body is a system whose geometry cannot be neglected and in which deformations due to external forces applied on the system are negligible.

In this question we need to establish a free body diagram with all critical forces and motion conditions. There are two external forces: (i) tension (\(F_{T}\)), (ii) weight (\(F_{g}\)), both in newtons.

The disk falls due to gravity and rotates around the string in a case of rolling, which combines rotation and translation. By Newton's laws of motion we have the following expression:

\(\sum F = -F_{g}+F_{T} = -m\cdot R\cdot \alpha\)   (1)

Where:

By algebra we derive the following relationship between the two forces:

\(-F_{g} = -F_{T}-m\cdot R\cdot \alpha\)

\(F_{g} > F_{T}\)

Therefore, the magnitude of the weight of the disk is greater than the magnitude of the tension force of the string. ((c) \(F_{T} < F_{g}\)) \(\blacksquare\)

The statement is incomplete and poorly formatted. Correct and complete form is shown below:

A thin uniform disk of mass m and radius r has a string wrapped around its edge and attached to the ceiling. The bottom of the disk is at height 3R above the floor, as shown above. The disk is released from rest. The rotational inertia of a disk around its center is \(I = \frac{1}{2}\cdot M\cdot R^{2}\).

When released from rest, the disk falls and the string unwinds. The force that the string exerts on the disk is \(F_{T}\), and the gravitational force exerted on the disk is \(F_{g}\). Which of the following expression correctly relates \(F_{T}\) and \(F_{g}\) as the disk falls?

(a) \(F_{T} > F_{g}\), (b) \(F_{T} = F_{g}\), (c) \(F_{T} < F_{g}\)

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Answer:

Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for navigation, foraging, and hunting in various environments.

If the width of the slit through which light from a red laser passes to form a diffraction pattern is increased, the width of the central maximum increases.

In the phenomenon of diffraction, light bends around the edges of obstacles or through the edges of an aperture or a slit. The pattern formed on a screen placed on the other side of the obstacle or slit is referred to as a diffraction pattern. In a diffraction pattern formed by a narrow single slit through which light from a red laser passes, the central maximum is the bright region at the center of the pattern.

The intensity of the light in the central maximum is the highest of all the diffraction maxima.The width of the central maximum increases as the width of the slit through which light from a red laser passes to form a diffraction pattern is increased. This is because when the slit width is increased, the amount of diffraction of light increases. The greater the diffraction, the wider the central maximum.

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The pace at which an object's location shifts when seen from a particular angle and measured against a particular interval of time is referred to as its velocity.

When gravity first exerts force on an object, its initial velocity defines how quickly the object moves. The final velocity, on the other hand, is a vector number that gauges a moving body's speed and direction after it has reached its maximum acceleration.

No, it won't hit the intended objective.

The concept of velocity refers to the rate and direction of motion of a point. For instance, the orientation of a circular path is always perpendicular to the line that connects a point to the center of the circle.

No, the cannonball won't reach the target.

the settings provided;

cliff height, h = 100 m cannon's target distance, R = 400 m starting horizontal velocity, or = 50 m/s

The amount of time it takes for the cannonball to fall from the specified height is provided by:

h = voyt + gt2

1000+0.5 x 9.8 x 12 100= 4.9/2

12- 100 = 4.9

t=20.41

t = 4.52

The cannon ball's horizontal distance at this point is computed as follows:

X = vor xt

X= 50 x 4.52

X = 226 m

Less than the 400 m goal distance is 226 m.

As a result, we may infer that the cannon ball will miss its target.

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Answer:

To start something moving, a push force must be greater than resisting forces such a friction.

Explanation:

The force of resistance, for example friction, slows things down, so the push force must be greater in order to increase the speed or to start something moving.

Answer:

Physics

Explanation:

:):):)

Answer: C

Explanation:

The kinetic energy of the wind turns the turbine which creates kinetic energy of it's own, this rotational kinetic energy can be called mechanical energy and is used to create electricity

Answer:

True

Explanation:

"The percentage of the population living in extreme poverty goes down." Therefore, option (D) is correct.

Migration from rural areas to cities can have a positive impact on poverty reduction. Urban areas often offer better access to job opportunities, education, healthcare, and social services, which can help individuals and families improve their living conditions.

As people migrate to cities and gain access to these resources, the percentage of the population living in extreme poverty tends to decrease.

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Answer:

Explanation:

To add or subtract two vectors, add or subtract the corresponding components. Let →u=⟨u1,u2⟩ and →v=⟨v1,v2⟩ be two vectors. The sum of two or more vectors is called the resultant. The resultant of two vectors can be found using either the parallelogram method or the triangle method .

Answer:

B Is not a problem

But A is

Explanation:

its either he is long sighted

so he is able to read from far and not near so it's better he sees a doctor to get recommend glasses

Answer:

μ = 0.125

Explanation:

To solve this problem, which is generally asked for the coefficient of friction, we will use the conservation of energy.

Let's start working on the ramp

starting point. Highest point of the ramp

         Em₀ = U = m h y

final point. Lower part of the ramp, before entering the rough surface

        \(Em_{f}\) = K = ½ m v²

as they indicate that there is no friction on the ramp

          Em₀ = Em_{f}

          m g y = ½ m v²

          v = \(\sqrt{2gy}\)

we calculate

          v = √(2 9.8 0.25)

           v = 2.21 m / s

in the rough part we use the relationship between work and kinetic energy

          W = ΔK = K_{f} -K₀

as it stops the final kinetic energy is zero

          W = -K₀

The work is done by the friction force, which opposes the movement

          W = - fr x

friction force has the expression

          fr = μ N

let's write Newton's second law for the vertical axis

         N-W = 0

         N = W = m g

we substitute

            -μ m g x = - ½ m v²

           μ = \(\frac{v^{2} }{2 g x}\)

Let's calculate

           μ = \(\frac{2.21^{2}}{2\ 9.8\ 2.0}\)

           μ = 0.125

A 8.0 kg box is released from rest at a height y0 = 0.25 m on a frictionless ramp. The box slides from the ramp onto a rough horizontal surface. The box slides 2.0 m horizontally until it stops.

What is the friction coefficient of the horizontal surface?

Answer: 0.125