Energy, Thermodynamics, and Heat Practice Questions

Entropy is a measure of

• Tastiness

• Disorder

• Structure

• Potential Energy

The _____________ Law of thermodynamics states that Energy is Conserved

• 1st

• 2nd

• 3rd

• 4th

Increasing the Temperature of something causes

• The particles of that material to decrease collisions

• The particles of that material to decrease movement (kinetic energy)

• The particles of that material to increase Collisions

• Entropy to decrease

Two tennis balls collide midair and bounce off one another. This is an example of:

• A Crash

• An Inelastic Collision

• An Elastic Collision

• A Tradgedy

A 60 kg high schooler is running in the gym at 15 m/s while they're talking to someone. They then run into a wall, stopping them completely. If the wall applied a force of 600 Newtons, how many seconds did it take to stop them completely?

• .75 seconds

• 1.0 seconds

• 1.25 seconds

• 1.5 seconds

Think of the following: A car crashes into a wall, resulting in the car being stopped completely. Scientists are concerned for the safety of those in the car, so they start brainstorming.

Regarding impulse, if we wanted to reduce the amount of Force delivered to the object, what should the scientists do?

• Increase the mass of the car so the car's mass takes the force instead.

• Increase the speed of the car so it happens faster.

• Change the car to a spaceship (which will still hit the wall)

• Increase the amount of time of the collision, which decreases the Force, while keeping Impulse the same.