Types of Energy
Conservation of Energy
Thermodynamics
Electricity & Magnetism
Conductors & Insulators
100
The ability to do work.
What is energy?
100
A bucket of water is pulled up at constant speed. Is the bucket's PE increasing or decreasing?
Increasing
100
Heat must travel in which direction?
Hot to cold
100
Electric fields are pointed toward [positively/negatively] charged particles.
Negatively
100
An Object that allows charge to flow freely
What is a conductor?
200
KE or PE? Electric current in a smart phone.
Kinetic energy
200
An elevator moves from the 15th floor to the 10th floor at a constant speed. What is happening to the elevator's PE and KE?
PE decreasing. KE constant
200
"Energy is conserved."
What is the first law of Thermodynamics?
200
As the distance increases, the strength of an electric field appears to [increase/decrease]
Decrease
200
A material that offers very little resistance.
What is a superconductor?
300
KE or PE? Flames from a burner on a stove.
Kinetic Energy
300
Select the point with least PE.
Point C
300
T/F. Internal Potential Energy lies between the bonds of an object's atoms.
True
300
Device that converts electrical energy into mechanical energy.
What is an electric motor?
300
T/F. All objects are able to conduct electricity. It's just a matter of how much or under what conditions.
True
400
KE or PE? Energy in a chromebook's battery
Potential energy
400
What is the PE of the ball at point B?
30 J
400
Thermodynamic law that helps us better understand the passage of time.
Second law of Thermodynamics (entropy)
400
Light acts as a [wave/particle].
Wave AND a particle
400
T/F. When you rub a balloon and hold it near an aluminum can, there is an observable electrostatic interaction since the can will move away from the balloon. Since balloons are made of insulative material the can has to be the object that is charged.
False.
500
KE or PE? Paint on a luminous watch dial.
Potential energy
500
What does it mean for energy to be dissipated?
Energy is transferred out of the system
500
Why is the Absolute Zero (0 Kelvin) a theoretical value?
0th & 1st - heat needs to go somewhere
2nd - entropy should always increase
500
Picture a particle in an electric field. At it's initial position, it feels an electric force strength of 16 N/mC. If the particle doubles it's distance away from the electric field source, what will the new electric force strength be at this final position?
4 N/mC.
500
Silicon is an example of a/an...
Insulator