A13 g bullet traveling 213 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 152m/s. if the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

This is the substance(s) formed in a chemical reaction.

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.