Answers to Physics Questions: Temperature, Range, Forces, Spillage, and Speed

In summary, the conversation covers topics related to thermal expansion, kinetic energy, Newton's Third Law of Motion, heat transfer, and fluid dynamics.
  • #1
lenbc2006
4
0
1. 1) You have a brass bar and an aluminum bar which are fastened to two immovable walls and there's an air gap between them. At a certain temperature, the gap measures a certain amount. What temperature will cause the gap to close?

2) A tennis ball starts from rest rolls down a hill and at the end of the hill becomes airborne. (diagram) Find the horizontal range that the ball drops in.

3) a woman leans against a wall. Find the forces on the woman. Theres horizontal force on her due to the wall and there's two forces vertical and horizontal on her shoes to the floor. Find them all. (forces due to wall on woman, forces due to ground on woman)

4) You have a radiator in car which is filled with a coolant at a certain temperature.Temperature increases to a very high number when car is operable. The radiator and the coolant gives off a spillage. Calculate the amount of spillage. (copper)

5) You have a fuel pump (in a car) and fuel is going at a certain rate and it has a certain density and radius of the fuel line. Find the speed at which the fuel will move through the line?






3. To what topics ( e.g. Work, Momentum, Torque, etc) do these statement relate to? for example, #2 i think relates or has to do with kinetic energy, what do you think about the rest of them?
 
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  • #2
1) Thermal Expansion2) Kinetic Energy3) Newton's Third Law of Motion4) Heat Transfer5) Fluid Dynamics
 
  • #3


1. The temperature causing the gap to close relates to thermal expansion, which is a property of matter that causes it to expand or contract when heated or cooled. This is related to the concept of heat transfer and the thermal energy of the materials involved.

2. The horizontal range of the tennis ball relates to projectile motion and the conservation of energy. The ball starts with potential energy at the top of the hill and converts it to kinetic energy as it rolls down, and then to potential energy again when it becomes airborne. The range can be calculated using equations for projectile motion.

3. The forces on the woman relate to Newton's laws of motion. The horizontal force from the wall is an example of a normal force, which is a reaction force to the weight of the woman pressing against the wall. The vertical and horizontal forces from the ground on her shoes are also normal forces, as well as friction forces.

4. The spillage from the radiator relates to the concept of heat transfer and the specific heat capacity of the coolant. As the temperature of the coolant increases, it expands and can potentially overflow the radiator. Calculating the amount of spillage would involve the specific heat capacity of the coolant and the volume of the radiator.

5. The speed of the fuel moving through the fuel line relates to the concept of fluid dynamics and Bernoulli's principle. The density and radius of the fuel line, as well as the rate of fuel flow, affect the speed at which the fuel moves through the line. This can be calculated using equations for fluid flow.
 

1. What is temperature?

Temperature is a measure of the average kinetic energy of the particles in a substance. It is typically measured in units of degrees Celsius (°C) or Fahrenheit (°F).

2. What is the range of a projectile?

The range of a projectile is the horizontal distance it travels before hitting the ground. It is affected by factors such as the initial velocity, angle of launch, and air resistance.

3. What are forces?

Forces are interactions between two objects that cause a change in motion. They can be classified as contact forces (exerted through physical contact) or non-contact forces (exerted from a distance).

4. How do you handle a spillage in a laboratory?

In case of a spillage in a laboratory, it is important to follow proper safety procedures and protocols. This may include wearing appropriate protective gear, containing the spill, and properly disposing of any hazardous materials.

5. What is speed?

Speed is the rate at which an object moves, calculated by dividing the distance traveled by the time it took to travel that distance. It is typically measured in units of meters per second (m/s) or kilometers per hour (km/h).

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