Category 1
What does the law of conservation of energy state?
Energy can not be created nor destroyed (it can be transformed and transferred)
Give an example of energy being TRANSFERRED
Potential ----- Kinetic
Chemical----- Electrical
Other examples
What is Kinetic Energy?
Energy in motion
What is thermal energy?
Energy involved with the movement of the particles (heat-faster movement, cold- slower movement)
What is potential energy?
Energy that is stored
How does speed (velocity) affect kinetic energy?
More speed (velocity), more kinetic energy
How does chemical energy different than nuclear energy?
Chemical- between the bonds
Nuclear- within the nucleus
How does mass affect potential energy?
More mass, more PE
Less mass, less PE
Energy that needs electricity- the movement of electrons
Water, Sun, & Wind are renewable resources?
TRUE- can easily be replaced/used again
What is con for using nuclear energy?
It is dangerous as we are working with the nucleus (fusion & or fission)
A baseball is thrown at a speed of 20 m/s. The baseball has a mass of 0.15 kg. Calculate its kinetic energy.
KE: 1/2 mv^2
KE: 1/2 (0.15) (20^2)
KE: 30
Coal, Oil, and Natural gas are considered nonerasable resources. They can also be considered what type of fuels?
Fossil Fuels
Spiderman sits on top of a skyscraper. If the building is 250 m tall and Spiderman has a mass of 80 kg, what is his potential energy?
PE: M x H
PE: 250 * 80
PE = 20,000
Ms. Shane is holding a book, and then drops the book from a height of 1.5m. Describe when KE is the highest & lowest, and when PE is the highest & lowest
KE: Highest when falling down
PE: Highest when held in the air
PE: Lowest when falling down
KE: Lowest when held in the air