Answer:
C) The amount of water released through the dam and the dam's height account for the potential energy
Explanation:
The gravitational potential energy of an object is given by:
where
m is the mass of the object
g is the acceleration of gravity
h is the height of the object relative to the ground
As we see from the equation, the potential energy depends on two factors related to the object:
- its mass
- its height above the ground
So for the water in the dam, its potential energy depends on
- the mass of the water (= the amount of water released)
- the height of the water (= the dam's height)
So the correct answer is
C) The amount of water released through the dam and the dam's height account for the potential energy
Answer:
d
Explanation:
Ya gon find the Kenitic Energy first
K=½mv²===> K=½×0.2×(0.2)²===> 0.1(0.04)===> 0.004
and now the replacement:
0.004=½×0.4V²====> v²=0.02===> V=0.14m/s
Answer:
I uploaded the answer to a file hosting. Here's link:
Explanation:
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I think the correct answer from the choices listed above is the second option. For endothermic reactions, the reactants have less energy than the products. Which would mean that energy should be added to the reaction for it to proceed. Hope this answers the question.