Final Exam

What is the SI unit for elastic energy?

• Newtons

• Watts

• Kelvins

• Joules

What are the SI units for heat?

• Kelvins

• Celsius

• Joules

• Watts

In the following equation, what does the k stand for? elastic energy = 1/2 kx²

• kinetic energy

• spring constant

• elastic constant

• momentum

Power is found by dividing work by what other physical quantity?

• distance

• mass

• force

• time

Power can be described as

• how hard you push.

• how fast you push.

• how far you push.

• how long you push.

The SI unit for power is

• Watts

• Joules

• Newtons

• Horsepower

In general, efficiency is defined as

• output divided by input.

• input divided by output.

• output multiplied by input.

• output minus input.

The largest source of electric power in the U.S. is

• coal.

• solar.

• natural gas.

• nuclear.

• hydroelectric.

Thermal energy transfer is called

• temperature difference.

• heat difference.

• temperature flux.

• heat.

Which of the following coordinate systems is most common?

• rectangular

• cylindrical

• spherical

• polar