a simple pendulum of length L is set to oscillate in simple motion .The bob gravitational potential energy is zero at its lowest vertical point . When the bob's height is at half its maximum h=hmax/2 then its velocity is?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

What was the first instrument to ever record an earthquake?