An eclipse of the moon is caused by the
a. curvature of the moon.
b. moon's shadow.
c. curvature of the sun.
d. earth's shadow

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.

The dot diagram represents the motion of the motorcycle as it moves from left to right

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