Answer:
B
Explanation:
Heat increase molecular motion
Your answer is C) The speed of sound is higher in solids than in liquids.
The formula for force exerted on/by a spring is
F = k*e where k is the spring constant and x is the distance stretched from
unstrained position. This should allow you to find what you need.
Using F = k x e,
where k is the spring constant,
and e is the extension,
The F is her weight = 45 X 0.80
= 36 N
Answer:
1.25kg
Explanation:
Simply multiply volume and density together