I'd go for D here. It also fits in with the idea of thermal expansion - as something is heated up, molecules vibrate and maybe collide. they vibrate with bigger amplitudes, so taking up more space, so expanding. maybe
A) the universe is expanding
Every galaxy is moving away from each other - not just us. And the further they are away, the faster they are moving
Answer:
I just toughed it out and talked with friends
Explanation:
Answer:
284.4233 N/m
Explanation:
k = Spring constant
x = Compression of spring = 14.5 cm
U = Potential energy = 2.99 J
The potential energy of a spring is given by

Rearranging to get the value of k

The spring constant is 284.4233 N/m
An educated guess about something. (What might happen in the future)