Chapter 15 Review

How much gravitational potential energy (GPE) does a 5 kg cat gain when lifted 2 meters into the air?

• A) 10 J

• B) 98 J

• C) 50 J

• D) 20 J

What is the kinetic energy (KE) of a 500 kg armadillo moving at 5 m/s?

• A) 6250 J

• B) 1250 J

• C) 2500 J

• D) 5000 J

What is the gravitational potential energy of a 3.5 kg object that is 300 m above the surface of the Earth?

• A) 10290 J

• B) 10500 J

• C) 9800 J

• D) 10350 J

Calculate the gravitational potential energy of a bell weighing 190 kg, located at the top of a 45 m high tower.

• A) 83790 J

• B) 9500 J

• C) 7600 J

• D) 8505 J

How much energy does a 25 kg object have when moving at a velocity of 4.6 m/s?

• A) 132.5 J

• B) 265 J

• C) 529 J

• D) 158.5 J

Match the correct energy transformation for a campfire.

• A) Nuclear → Electromagnetic and Thermal

• B) Chemical → Thermal and Electromagnetic

• C) Electrical → Mechanical

• D) Mechanical → Sound

Which energy transformation best describes the operation of a solar panel?

• A) Chemical → Electromagnetic

• B) Electromagnetic → Electrical

• C) Electrical → Mechanical

• D) Chemical → Thermal and Electromagnetic

Describe the differences between nonrenewable and renewable resources.

• A) Nonrenewable resources can be naturally replenished

• B) Renewable resources are unlimited

• C) Nonrenewable resources are mostly fossil fuels

• D) Renewable resources are mostly derived from natural phenomena

What is the primary reason fossil fuels currently account for the majority of the world's energy use?

• They are distributed evenly throughout the world.

• They are non-polluting.

• They are relatively inexpensive and readily available.

• They are renewable energy resources.

Which energy resource is most used for the world's present energy consumption?

• Uranium

• Solar energy

• Fossil fuels

• Wind energy