What happens to rocks as water combines with gases in the air to form acids? a. the acid dissolves or alters the chemical composition of the rock. b. the acid solidifies any loose rock particles, which makes the rock denser. c. the acid forms a protective coating on rocks, making it difficult for them to weather. d. the acid creates cracks in the rocks, which allow air to circulate through the rock, causing it to weather

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?