Chapter 1: Energy

Flashcards based on lecture notes about energy and related concepts.

What is energy?

The ability to do work.

What is kinetic energy?

Energy of motion.

What is chemical energy?

Energy stored in molecules and chemical compounds.

Identify light energy conversion to chemical energy

Light transforms to chemical energy.

The unit of work energy is:

Joule (J)

A kilowatt is:

1,000 watts.

Identify chemical energy conversion to mechanical energy

Chemical energy transforms to mechanical energy.

Energy can be:

Transformed to another; potential energy (stored energy).

The energy associated with gravitational force near the surface of earth is:

Potential energy (stored energy).

What is mechanical energy?

Kinetic + potential.

What is the law of conservation of energy?

Energy cannot be created or destroyed.

What is a calorie?

Heat required to raise the temperature of something from 14.5 to 15.5 degrees Celsius.

The British Thermal Unit (BTU) is defined as:

Heat energy required to raise the temperature of 1 pound of water from 63 to 64 degrees Fahrenheit.

The British Thermal Unit (BTU) is used to measure:

Heat energy.

What is a watt?

Unit of power.

A kilowatt hour measures:

Electrical energy.

A watt is equal to:

1 Joule/second.

An iron rated 1000 watts consumes:

1 x 3.6 x 10^6 J

A 200 watt lightbulb is operated for 60 hours. How much does it contribute to a billing rate at 10 cents per (kWh)?

1.20 cents

How is electrical energy expressed?

Kilowatt-hours.