Speed can be measured by bouncing waves off an object, because of the Doppler Effect.
Answer:
The answer to your question is: F = 0.4375 N. The force will be 16 times lower than with the first conditions.
Explanation:
Data
F = 7 N
F = ? if the masses is quartered
Formula

Process
Normal conditions F = Km₁m₂/r² = 7
When masses quartered F = K(m₁/4)(m₂/4)/r² = ?
F = K(m₁m₂/16)/r²
F = K(m₁m₂/16r² = 7/16 = 0.4375 N
Shape, because a liquid can have mass, volume, and color, but it cannot have a definitive shape
It was Hooke who formed his ideas about living things by performing observations without using a microscope, but it should be noted there were others as well.