Energy
Energy that can do work (KE + PE)
What is Mechanical Energy?
A theorem that states the amount of work done on an object is equal to its change in energy.
What is the Work-Energy Theorem?
A thermal system that converts thermal energy into mechanical energy.
What is a heat engine?
An object that has a low resistance to electron flow such as copper, silver, and gold.
What is a conductor?
The SI unit of charge.
What is a coulomb?
A sprinter, running across the finish line of a track has this type of energy.
What is kinetic energy?
Work / time (the rate at which work is done)
What is power?
A type of energy measured with a calorimeter.
What is heat? (or thermal)
An object that has experienced this still has a neutral charge, but now a distribution of positive charge on one side and a distribution of negative charge on the other.
What is polarization?
The SI unit for heat, energy, and work.
What is a joule?
Mass x gravity x height will tell you how much ________ an object has.
What is gravitational potential energy?
You move a car 10 meters with a force of 20 Newtons. The amount of work you did on the object must be ________.
What is 200 J.
The measure of the average kinetic energy of a substance is called this.
What is Temperature?
An object with this type of charge will repel positively charged objects and attract neutrally charged objects.
What is a positive charge?
The SI unit of Temperature
A falling object is converting its gravitational potential energy into kinetic energy as its speed is _________.
What is increasing?
The power of a horse that ran on a treadmill for 1000 seconds and is measured to have put out 500,000 Joules of energy.
What is 500 watts?
This law of thermodynamics tells us that our energy breaks down into unusable forms with each use and heat flows from hot to cold.
What is the 2nd Law of Thermodynamics?
These materials have a high resistance and charge is not easily distributed throughout the object.
What are insulators?
The SI unit of Power
What is a Watt?
The kinetic energy of a 40 kg moped travelling at 10 m/s.
What is 2000 J?
A construction worker moved a crate full of equipment 20 meters using a constant force of 70 Newtons. If the force was applied for 10 s, how much power was developed?
140 Joules.
The efficiency of an automobile engine that burns gasoline at 1089 K and exhausts to an ambient temperature of 300 K.
What is 72% efficient? (0.72 will also be accepted)
This law, similar to our law of universal gravitation, states that the electric force between two objects increases as they become closer.
What is Coulomb's Law?
The SI unit of electric field.
What is a volt?