You are investigating Hooke's law by putting different masses on the end of a spring. What apparatus would you use to measure the force exerted by the mass hanging from the spring?

hang an empty slotted mass carrier from the lower end and measure the new length of the spring. keep adding more slotted masses, measuring the new length each time.

Explanation: Hope this helps :)

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

answer: b.

explanation: