When a mass of 3.0-kg is hung on a vertical spring, it stretches by 0.085 m. Determine the period of oscillation of a 4.0-kg object suspended from this spring.

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?