During the fall, all the initial potential energy of the rock
has converted into kinetic energy of motion
where h is the initial height of the rock, m its mass, and v its velocity just before hitting the water. So, for energy conservation, we have
and so we can find the value of K, the kinetic energy of the rock just before hitting the ground:
It's velocity when it strikes the ground is. D. 232.9 kg.m/s<span>.
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I hope this helps!!!
(a) There will be half as many bright fringes on the screen.(b) The bright fringes will be twice as close.(c) The bright fringes will be two times farther apart.(d) The location of the fringes will not change, but they will be a little bit wider and less bright.
Answer:
d) The location of the fringes will not change, but they will be a little bit wider and less bright.
Explanation:
When one blocks half of the grating slits, the intensity of the interacting light is reduced, which reduces the brightness of the light. The angle of interference on the screen increases, thus is due to the reduced intensity of the light beams which makes the pattern become wider.
Answer: Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero
Explanation: Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero.
