Answer: As Earth spins on its axis, we, as Earth-bound observers, spin past this background of distant stars. As Earth spins, the stars appear to move across our night sky from east to west, for the same reason that our Sun appears to “rise” in the east and “set” in the west.
Explanation:
The answer is: Salt! :)
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True is The answer would be I just did this
The position of the mass is given by (in cm):

The velocity is the derivative of the position:

Substituting t=0.40 s, we can find the velocity at this time:
Answer:

b)

Explanation:
Let the amplitude of SHM is given as A
so the total energy of SHM is given as

now we know that
a)
kinetic energy is given as

here

so now we have


now its fraction with respect to total energy is given as

b)
Potential energy is given as

so we have

so fraction of energy is given as
