A 1-kg ball is 12 m above the ground, with an initial velocity = 0 m/s. Use the following formulas
[ KE = 1/2 xm x V2]
[P. E = mxgxh] . g =9.8 m/s2
[ Mechanical energy = K. E + P. E]

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

You can decrease the resistance of a length of wire by

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)