A stone of mass 0.5kg is throw upward with a velocity of 40m/s. Calculate the Kinetic energy of the stone if the stone descends to a hight of 30m. Find the potential energy at this hight (g=10m/s)

What are similarities and differences of reflection, refraction, diffraction and absorption?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?