If a mass of 0.75 kg attached to a vertical spring stretches the spring 5.0 m from its original equilibrium position, what is the spring constant?

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.

How to tell if a molecule is polar or nonpolar with electronegativity

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.