A 0.84-kg block sits on a lab table. The block accelerates to the right at a rate of 1.96 m/s/s There is a backwards force of 0.87 N. What is the force pulling the block forward?

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

If element x has 99 protons how many electrons does it have

This is the number of complete movements of a wave per second.