What are some signs of physical change

if you are talking about the body then increased hormones as physical changes  with growing in sexual parts  and for guys increase in with muscles and growing in breast.

If it was of a change in physical properties. as of natural in universe then it would be melting, transition to different states of matter.

Explanation:

When everyone gets of age they grow and mature and these kind of changes happen

The reason for that would be of the change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density, These are some examples of physicals changes

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000