A box of 5kg is lifted 10m. how much work is done?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

If steel is more dense that lake water, why can a boat float

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.