Theory Worksheet 15.2

In which of the following sources of energy is heat transfer not used in producing energy?

(Hint: Photovoltaic cells convert light energy directly into electrical energy.)

• Biofuel

• Geothermal energy

• Solar energy (photovoltaic)

• Fossil fuel

Which of the following is a renewable source of energy that releases no polluting substances into the environment?

• Coal

• Wind energy

• Kerosene

• Nuclear energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy

The sport in the diagram involves using the body as a source of energy (chemical potential energy). Which of the following energy conversions apply to the sport?

• Chemical potential energy in muscles ---> Kinetic energy

• Chemical potential energy in muscles ---> Gravitational potential energy