Physics Chapter 21
Energy content in a piece of food can be determined by
Burning the food
Helium
Expands most when the temperature is lowered
Desert sand is very hot in the day and very cold at night is evidence that sand
Has a low specific heat capacity
Some molecules are able to absorb amounts of energy in the form of internal vibrations and rotations. Materials composed of such molecules would have
High specific heat capacities
Heat is Measured In
Kilocalories, joules, and calories
When I am a ring is heated the whole becomes
Larger
Temperature
Related mostly to the average molecular kinetic energy in a substance.
Heat
The energy transferred between objects because of a temperature difference
Internal Energy
Total Amount of energy contained in an object
The reason fish live from year-to-year and ponds at freeze over in the winter is that
Water below the ice is 4° above freezing
The reason emotions temperature doesn't vary much from one season to the next is that
Water has a high specific heat capacity
Water or Sand
Water has a higher specific heat capacity than sand.
4 Degrees C
When a container of water is at its smallest volume
Which at the same temperature will cool more slowly on the Hotday
watermelon
