It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, and all its kinetic energy is converted into heat via friction. find the minimum speed of a lead bullet (initial temperature = 43.0° c) for such an event to happen? (use lf = 2.32 104 j/kg and melting point = 327.3° c.)

How does convection affect our atmosphere? our layers of earth? our oceans?

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 the measurement of how fast an object moves relative to a reference point?