و By assuming that a hydrogen atom consists of an electron of charge ē orbiting a proton of charge e calculate the ratio of the electric force between
the electron and the proton to the gravitational force between them. [Given that mass of ē = 9.1 x 10^-31kg, mass of e= 1.64×10^-27kg, G = 6.67×10^-11]

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.