Two carts connected by a 0.05 m spring hit a wall, compressing the spring to 0.02 m. The spring constant k is N
100
m
What is the elastic potential energy stored from the spring's compression?
Choose 1
-3.0J
-0.045 J
0.090 J
0.045 J

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

elctricity and magnet is conversion to it

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

3. dark matter

empty space could also be a simple vacuum