You are holding a balloon which you charged by rubber against your hair. The balloon is holding Q amount of charge. There is a foam ball 3 meters away
and carrying a charge of -0.002 C. They attract each other with a force of 200
N. Find charge Q. Is it a positive or negative charge, why?

Which fators influence ocean currents

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s