xxaurorabluexx
18.11.2020 •
Physics
PLEASE HELP!!
1.The Law of Conservation of Energy states that?
A. matter cannot be created or destroyed, only stored and transferred.
B. momentum cannot be created or destroyed, only stored and transferred.
C. energy cannot be created or destroyed, only stored and transferred.
2.The total amount of kinetic and potential energy in a system that remains constant is the system's
A .mechanical energy
B. elastic energy
C. chemical energy
D. gravitational energy
3, At the top of a giant hill sits a roller coaster cart, all the energy of the cart is stored as
A. kinetic energy
B. chemical energy
C. elastic energy
D. gravitational potential energy
4. At the bottom of the hill (ground level), the roller coaster cart in the previous problem, all the energy of the cart is stored as
A. kinetic energy
B. chemical energy
C. elastic energy
D. gravitational potential energy
When a pendulum swings when will the potential energy be at a maximum?
A
B
C
D
6. If total mechanical energy = kinetic energy + potential energy, TME = KE + PE, and a roller coaster has 500 J of total mechanical energy. At the very beginning of the track the roller coaster has 500 J of potential energy, how much kinetic energy is there at the beginning of the track?
A 25 kg child is sitting at the top of a 4 m tall slide, what is his potential energy?
It the same child has a velocity of 2 m/s half-way down the slide, what is his kinetic energy?
If the TME energy for the same child on the slide is 100 J, how much potential energy does the child have half-way down the slide?
Solved
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Ответ:
A
A
D
D
when the pendulum is at the lefend and right end.
0 because kinetic energy is only formed when a moving object is moving.
dont know the others sorry
Explanation:
i got about half way for you hope it correct
give me nothing if you got some wrong!
or just give me a message saying that i didn't help
Ответ:
Mountain ranges line up when some continents are placed side by side.
South Africa was once covered by glaciers, according to geologic evidence.
Explorers and mapmakers noticed that the continents fit together like puzzle pieces.
Explanation:
Continental drift refers to the idea that the world's land masses are slowly moving over time, which was later replaced by the plate tectonics theory. It was first proposed by a scientist named Alfred Wegener, who claimed that the continents were once one large landmass that drifted apart very slowly over a long time.