16. much discussion has focused on the need to drive more efficent cars and use less electricity.if the law of conservation of energy is true. why are people concerned about energy usage?
the problem is that the original form of the energy (gasoline) is now mechanical energy and it was the first one being created. In 2017 there are too many electric cars but it cant be compared with the gasoline cars and create a electric car is more expensive.
17. if heat flows in only one direction, how can both hot and cold liquids reach room temperature as they sit on a table?
the heat from the object goes in the air and the air goes to the cold liquid
18. think about what happens to jack and jill in the nursery room. what kinds of enrgy are used? how was each energy form used?
if they are walking they are using kinetic energy but if they dont move they are using potential energy
19. compare the 3 temperature scales you learned about. how are they different? how are they similar?
the celsius scale is based on 0°
many scientifics use the kelvin scale
farenheit scale, water freezes at 32° and it boils at 212 °
similar: they are all based off the freezing and boiling points of water.
different: they define them in different numbers.
20. use what you know about the movement of thermal energy to explain why you would place a minor burn on your arm under cool, running water.
because heat moves from the warmer object to the cooler one.
DEVELOPING SKILLS
now when you are standing up on the tramp you have potential energy due to standing at a higher level above ground.
when you are jumping on the tramp you have both kinetic and potential energy. potential for the springs and height kinetic energy when you are moving in the air.
so when you are in your highest point you have the most potential energy.
when in the middle half you have the most kinetic energy.
when you are back in the bottom, touching the mat you have the max potential energy due to the spings.
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