The following table lists the speed of sound in various materials. Use this table to answer the question. The siren from a small town fire station is heard at a location 3 kilometers away. If the air temperature is 20°C, at what
velocity did the sound travel?
a.319 m/s
b. 331 m/s
c. 343 m/s
d. 387 m/s

How much work would a child do while puling a 12-kg wagon a distance of 3m with a 22 n force directed 30 degrees with respect to the horizontal? (a) 82j (b) 52j (c) 109j (d) 95j

The amount of potential energy possessed by an elevated object is equal to what?

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?