What is the definition of a joule?
A. Amount of heat needed to change the temperature of 1 gram of water by 1 degree Celsius.
B. Work done in applying a force of one newton through a distance of one meter.
C. Amount of heat needed to change the temperature of 1 kilogram of water by 1 degree Celsius.
D. Amount of heat required to change the temperature of 1 pound of water by 1 degree Fahrenheit.