**Answer:**

30hz is the answer for the question

It described a nucleus surrounded by a large volume of space. ... Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level. C) Electrons travel around the nucleus in fixed energy levels with equal amounts of energy.

No, not really unless you stop and slow down while they speed up

**Answer:**

Height of the image is 9.06 cm

**Explanation:**

As we know that the person is standing 250 cm from the lens

Now we know that the focal length of the lens is

f = 15 cm

now by lens formula we have

now we know by the formula of magnification

now we have