Could you please provide the options? :)
Answer: first one is electrochemical
Second one is combustion
Third one is photosynthesis
Fourth one is respiration
Answer:

Explanation:
When the car is under an accelerating force and hits a tree, the instant force received by the tree is the same force that is accelerating the car.
The accelerating force can be calculated using Newton's second law:

Where m is the mass of the car and a is the acceleration.


Answer:
0.5 Hz
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Potential energy due to gravity = Ep = mgh [symbols have their usual meaning ]
Evidently, HALVING the mass will make Ep , HALF its previous value. So, It will be halved.