Cupid fires a 135-gram arrow, moving at 30 m/s, into a stationary 1 kg heart-shaped box of chocolates. The arrow emerges (the arrow does not get embedded (or stuck) in the box)
with half of its original speed. Find the change in the kinetic energy of the system before
and after the collision.

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.

What is part of a line has one endpoint and continues in one direction?

How much work would it take to move a coulomb charge across a 4 volt potential difference?