A roller coaster car is nearing the end of the track and approaching the loading dock. It possesses 350 000 Joules of kinetic energy and 80 000 Joules of potential energy. A resistive force of 16 000 Newton is applied to the car over a distance of 20 meters along a level section of the track. The new kinetic energy of the roller coaster car is ____ Joules.
750000
670000
320 000
110 000

Answer:

vii. c

ix. a

x. d

Explanation:

trust

Answer:

A malleable material is one in which a thin sheet can be easily formed by hammering or rolling. ... In contrast, ductility is the ability of a solid material to deform under tensile stress.

The minimum force (Fmin) required to move the block up the ramp is 12.7 N.

Mass of the block (m) = 3.3 kg

Angle of the ramp (θ) = 37°

Coefficient of friction between the block and the ramp (μg) = 0.44

Coefficient of kinetic friction between the block and the ramp (uk) = 0.30

Step 1: Resolve the forces acting on the block.

The weight of the block (mg) can be resolved into two components:

- The force acting parallel to the incline (mg*sinθ)

- The force acting perpendicular to the incline (mg*cosθ)

Step 2: Calculate the force of friction.

The force of friction can be calculated using the equation:

Force of friction (Ff) = μg * (mg*cosθ)

Step 3: Determine the minimum force required.

To move the block up the ramp, the applied force (Fapplied) must overcome the force of friction.

Thus, the minimum force required (Fmin) is given by:

Fmin = Ff + Fapplied

Step 4: Substitute the given values and calculate.

Ff = μg * (mg*cosθ)

Fmin = Ff + Fapplied

Now, let's calculate the values:

Ff = 0.44 * (3.3 kg * 9.8 m/s² * cos(37°))

Ff ≈ 12.717 N

Fmin = 12.717 N + Fapplied

Therefore, the minimum force (Fmin) required to move the block up the ramp is approximately 12.7 N.

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Answer: The difference is that Mass is the amount of matter in an object. Mass is closely related to inertia. The greater the mass of an object, the greater the inertia. Weight is not the same as mass. Weight is associated with an object's location.

Explanation: Hope this was helpful

To find an equation for the line parallel to another line and passing through a given point, we can use the point-slope form of a linear equation.

The given line is parallel to the unknown line. We know that parallel lines have the same slope. Therefore, to find the slope of the unknown line, we can use the slope of the given line.

Let's assume the slope of the given line is m.

We can find the slope (m) using the coordinates of the given line, (-24, 17), and another point on the given line. Since we don't have another point on the given line, we need more information to find the slope.

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A balloon expands as you blow into it because of the increase in pressure inside the balloon caused by the air you are blowing into it. When you blow air into a balloon, the air molecules inside the balloon are pushed closer together, increasing the pressure inside the balloon. As the pressure inside the balloon increases, the balloon stretches and expands to accommodate the extra air.

The balloon is made of a flexible material, such as rubber or latex, which allows it to stretch and expand as the pressure inside it increases. The balloon's material has elastic properties, which means that it returns to its original shape when the pressure is released.

The process of blowing air into a balloon can be compared to filling a tire with air. As you inflate a tire with a pump, the air molecules inside the tire are pushed closer together, increasing the pressure inside the tire. This causes the tire to expand and become larger, until it reaches the desired pressure.

In summary, a balloon expands as you blow into it because of the increase in pressure inside the balloon caused by the air you are blowing into it. The balloon's material has elastic properties, which allows it to stretch and expand as the pressure inside it increases.

Answer:

w = 7.5 [J]

Explanation:

We must remember the definition of mechanical work, which tells us that work is equal to the product of force by distance. This force must be applied in the direction of movement. So we have the following equation:

w = F*d

where:

w = work [J]

F = force [N]

d = distance [m]

Now replacing we have:

w = 5*1.5

w = 7.5 [J]

ANSWER

EXPLANATION

Parameteters given:

Initial velocity = 190 m/s

To find the maximum height, we apply the formula for the maximum height of a projectile:

where u = initial velocity

θ = angle with the horizontal

g = acceleration due to gravity = 9.8 m/s²

From the question, the projectile is fired vertically upward. This means that the projectile will make a 90° angle with the horizontal.

Therefore, we have that the maximum height of the projectile is:

Answer:

Height is equal to 1841.8367m

Explanation:

KE = GPE

Write out the formula

1/2(m)(v^2) = mgh

Fill it with the information you have

1/2(190^2) = (9.8)(h)

Solve

1/2(36100) = 9.8h

18050 = 9.8h

1841.83673 = h

Write the complete answer out

Maximum height is equal to 1841.8367m (meters)

In question 28, effort needed to raise a resistance of 150 pounds In In question 29, mechanical lever is determined based on distance from the fulcrum to object and effort. In question 30, the mechanical advantage of an inclined plane is calculated based on its length and height.

28. To calculate the effort needed to raise a resistance of 150 pounds using a windlass, we can use the principle of mechanical advantage. The mechanical advantage of a windlass is determined by the ratio of the radius of the wheel to the radius of the axle. In this case, the radius of the wheel is 15 inches and the radius of the axle is 3 inches. The mechanical advantage can be calculated as MA = Radius of wheel / Radius of axle = 15 inches / 3 inches = 5. Therefore, the effort needed to raise the resistance is 150 pounds / 5 = 30 pounds.

29a. To find the mechanical advantage of the lever, we divide the distance from the fulcrum to the object by the distance from the fulcrum to the effort. In this case, the fulcrum-object distance is 1 meter and the fulcrum-effort distance is 2 meters. Therefore, the mechanical advantage is 1 meter / 2 meters = 0.5.

29b. The effort force needed to move the object can be determined by multiplying the mechanical advantage by the weight of the object. The weight of the object is given as 200 Newtons. Therefore, the effort force needed is 0.5 (mechanical advantage) * 200 Newtons = 100 Newtons.

30a. The mechanical advantage of an inclined plane is calculated by dividing the length of the inclined plane by its height. In this case, the inclined plane is 20 feet long and has a height of 4 feet. Therefore, the mechanical advantage is 20 feet / 4 feet = 5.

30b. The effort necessary to move a 100-pound object up the inclined plane can be determined by multiplying the mechanical advantage by the weight of the object. The weight of the object is given as 100 pounds. Therefore, the effort necessary is 5 (mechanical advantage) * 100 pounds = 500 pounds.

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Answer:

The correct answers to ur question are B and D

Explanation:

I know this because I had the same questions on my quiz and I got them right. Also there is another question just like this asking "According to the model, which two points on Earth are experiencing summer?" and the correct answer for that question is A and C!

Hope this helps!

Answer:

im pretty sure its because wax has i higher melting point therefore it would cool quicker if the temperature dropped more. water has a lower melting point so it takes longer to freeze i think. i hope this helps

Water and wax freeze from different directions due to the unique properties and behaviors of these substances.

Water:

When water freezes, it undergoes a phase transition from a liquid to a solid state.

Unlike most substances, water exhibits an unusual property known as the "anomalous expansion of water" or "density anomaly." This anomaly is caused by the hydrogen bonding between water molecules.

As the water cools down, its molecules begin to slow down and move closer together. This causes the density of the water to increase. However, as the water reaches around 4 degrees Celsius (39 degrees Fahrenheit), it starts to behave differently.

The hydrogen bonds between water molecules become more organized and stable, causing the water to expand and become less dense.

Wax:

Wax, on the other hand, does not exhibit the same density anomaly as water. When wax undergoes solidification, it follows a different pattern due to its molecular structure and the way its particles arrange themselves.

Wax typically consists of long, nonpolar hydrocarbon chains. As it cools, the wax molecules start to lose kinetic energy, slowing down their movement.

The intermolecular forces between the wax molecules become stronger, causing them to come closer together.

In summary, water freezes from the top due to its density anomaly, with the less dense, expanded water rising and forming a layer of ice on the surface.

Wax, however, freezes from the bottom as its molecules arrange and bond together, gradually solidifying upwards. These differences in freezing behavior are influenced by the distinct properties and molecular structures of water and wax.

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According to the second motion law, acceleration is created. As a result, the force applied to an item equal its and even times the rate at which its velocity changes over time (acceleration).

According to Newton's second law, an object's acceleration is approximately equal to its net force's magnitude, moves in the exact same direction as its net force, and is negatively proportionate to the weight of the thing.

F = ma, or force, is measured as mass times acceleration. According to the rule, an object's acceleration is influenced by both its mass and the force being applied. The law on kinetic energy and force is another name for Newton's second principle of motion.

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The component of a DC electric motor that ensures that the current is always in the proper direction to yield a torque that produces a continuous rotation of the coil is called a commutator.

The commutator is a component in a DC motor that ensures that the current always flows in the correct direction to generate a torque that results in a continuous rotation of the coil. The commutator in a DC motor is used to convert the alternating current produced by the motor's armature windings into direct current.The commutator is made up of a cylinder with a series of metal contacts, typically copper segments, that are divided in half by a narrow insulating strip. The commutator is installed on the motor's rotor shaft, and each commutator section is attached to a rotor winding. The brushes are attached to the stationary part of the motor, or stator, and make contact with the commutator segments, providing an electrical connection between the stationary and rotating parts of the motor. As the commutator rotates, the brushes alternate between making contact with the rotor windings, allowing current to flow through them, and breaking contact with the rotor windings, resulting in a continuous rotation of the motor.

The commutator is a critical component in a DC electric motor that ensures that the current always flows in the proper direction to generate the torque required for a continuous rotation of the coil.

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Answer:

the magnetic dipole moment caused by orbiting electrons

Explanation:

The voltage across the conductor is 500V.

Ohm's law states that the current through a conductor is directly proportional to the voltage across the conductor.

Here,

Current in the conductor, I = 50A

Resistance of the conductor, R = 10 Ω

According to Ohm's law,

V α I

V = IR

V = 50 x 10

V = 500 V

Hence,

The voltage across the conductor is 500V.

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The force experienced by a charged particle in a magnetic field is given by the equation F = qvB, where q is the charge of the particle, v is its velocity, and B is the magnetic field strength.

In this scenario with equal charges in the same uniform magnetic field, the charge with a velocity v will experience a larger force exerted on it by the magnetic field.

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The seven steps in the scientific method would be:

1. Make an observation.

2. Ask a question.

3. Form a hypothesis, or testable explanation.

4. Make a prediction based on the hypothesis.

5. Test the prediction.

6. Iterate: use the results to make new hypotheses or predictions.

7. Conclusion

Answer: kinetic energy and potentoal

Explanation: dhsjsjdne

Answer:

C. Volume

Explanation:

it displaces an equal amount of water to the amount of space it occupies.

Answer: i don't know

Explanation: still

The resulting charge on the conducting sphere after the process is complete will be zero, indicating that it has returned to a neutral state.

Initially, when the charged rod is brought near the grounded conducting sphere, the sphere will acquire an opposite charge through the process of induction. The charges in the sphere will redistribute, with the side facing the rod becoming oppositely charged and the side facing away becoming similarly charged. This happens because the charges in the sphere redistribute themselves to cancel out the electric field created by the charged rod and reach an electrostatic equilibrium.

When the rod is moved away, the charges in the conducting sphere will redistribute again to maintain the electrostatic equilibrium. However, since the sphere is grounded, any excess charge will be neutralized by the flow of charges into or out of the ground.

After the ground is removed, the conducting sphere will remain neutral because any excess charge has been dissipated during the grounding process. This is due to the fact that the grounding allows charges to flow between the sphere and the ground, equalizing their potentials.

Therefore, the resulting charge on the conducting sphere after the process is complete will be zero, indicating that it has returned to a neutral state. The grounding process ensures that any excess charge acquired during the presence of the charged rod is effectively removed.

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Answer:

D = 72.96 km,      θ = 36.43º

Explanation:

This is a vector addition exercise, we are going to solve it by decomposing the displacements.

First displacement

         cos 35 = x₁ / L

         x₁ = L cos 35

         cos 35 = y₁ / L

         y₁ = L sin 35

         x₁ = 22.0 cos 35 = 18.0 km

         y₁ = 22 sin 35 = 12,619 km

Second displacement

         cos 60 = x₂ / L

         x₂ = L cos 60

         x₂ = 47 cos 60 = 23.5 km

        sin 60 = y₂ / L

        y₂ = L sin 60

        y₂ = 47 sin 60 = 40.70 m

In total displacement it is

       x_total = x₁ + x₂

       x_total = 18 + 40.7 = 58.7 km

       y_total = y₁ + y₂

       y_total = 12.629 +40.70

       y_total = 53,329 km

Let's use the Pythagorean theorem

        D = √(x_total² + y_total² )

        D = √ (58.7² + 43,329²)

        D = 72.96 km

For the direction we use trigonometry

         tan θ = y_total / x_total

         θ= tan-1 (43,329 / 58.7)

         θ = 36.43º

Answer: I think cars are designed to have crumble zone because lets say you're going 60-70 mph and you hit a brick wall that cant move, it would be a very hard jolt causing the beings inside to get thrown forward, but if it has a crumble zone it would slow the the jolt from is slowing down in the hit.

Fertility fraud is a deceptive act that involves medical professionals using their own sperm or someone else's without the patient's consent during fertility treatments.

It is a violation of trust and a grave breach of ethical standards that can have significant emotional and psychological consequences for those who experience it.

Individuals and couples who undergo fertility treatments often do so with the hope and expectation of having a child. Fertility fraud can shatter that hope, leaving individuals feeling violated, betrayed, and devastated. The emotional pain and trauma that follow can be long-lasting, and can impact their personal relationships and mental health.

The desire to become a parent is a fundamental human need and is often accompanied by feelings of loss, grief, and despair when fertility treatments fail. The emotional burden of fertility fraud compounds these feelings, leading to an indescribable sense of betrayal and a loss of trust in the medical system.

It is important to acknowledge and support those who have experienced fertility fraud, and to advocate for legal and ethical standards that prioritize patient autonomy, informed consent, and transparency in all aspects of fertility treatments

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The negative plate is the one facing us because the electric field between the plates is zero, which can only happen if the two plates have the same magnitude and opposite sign of charge density.

Charge density is the amount of electric charge per unit area or per unit volume of a material or object. It is usually denoted by the symbol ρ and is measured in units of coulombs per square meter (C/m²) or coulombs per cubic meter (C/m³).

In the case of a charged plate, the charge density is the total charge on the plate divided by its surface area. For example, if a plate has a charge of 60 µC and an area of 2 m², then the charge density is:

Charge density = 60 µC / 2 m² = 30 µC/m²

Charge density is an important concept in electrostatics, as it is used to describe the distribution of electric charge over a surface or within a volume. It is also used in the calculation of electric fields and forces in electrostatics, as the electric field depends on the charge density of the objects producing the field.

Two large, charged plates with charge density ±30µC/m² facing each other with a separation of 5.0 mm.

One of the plates has a negative charge density.

We want to find out which plate is negative

1. Calculate the total charge on one of the plates using the charge density and the area of the plate:

Q = ±30 µC/m² * A

Here, A is the area of one of the plates.

2. Calculate the electric field due to each plate using Coulomb's law:

E = (1/4πε₀) * (Q / r²)

Here, r is the distance between the plates, which is 5.0 mm or 0.005 m.

ε₀ is the permittivity of free space, which is a constant and has a value of 8.85 x 10⁻¹² F/m.

Since there are two plates, calculate the electric field due to each plate and then take the difference between them to get the net electric field between the plates.

3. Substitute the values and calculate the electric field due to each plate:

E1 = (1/4πε₀) * (Q / r²)

E2 = (1/4πε₀) * (Q / r²)

Here, E1 is the electric field due to one plate, and E2 is the electric field due to the other plate. Since the plates have the same magnitude of charge density, their charges will have the same magnitude too, so we can drop the absolute value sign in Coulomb's law.

4. Subtract the electric field due to one plate from the electric field due to the other plate to get the net electric field:

E = E1 - E2

E = 0

Since, the net electric field is zero, this means that the electric field due to one plate is equal in magnitude and opposite in direction to the electric field due to the other plate. Therefore, the plates must have the same magnitude of charge and opposite signs of charge density.

5. Since, one of the plates has a negative charge density is known, this means that the negative plate is the one facing us. Therefore, the negative plate is the one that we were asked to identify.

Therefore, the negative plate is the one facing us.

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As the two socks are being spun too slowly, they are probably not going to stick together since the static charge would be too small to cause them to adhere.  

An imbalance in the charged particles of the thing is what causes static electricity, according to this definition. Until they are released or discharged, these charges remain on the object's surface. Static electricity is produced at the surface of the object as a result of these charges.

When a dryer's electricity supply is turned on, clothing spin faster and become stuck to one another, creating friction force between them. When the supply gets off, the spinner stopped its movement and the result is the static electricity that causes the socks to stuck together.

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Answer: Shoeprints, tire tracks , tool marks and the marks that are found on a fired bullet. And they can be found in a variety of surfaces including dust, carpet and mud.

Hope this helps!