A car engine supplies 2.0 × 10^3 joules of energy during the 10 seconds it takes to accelerate the car along a horizontal surface. What is the average power developed by the car engine while it is accelerating?

Blank liquids and gases exert a buoyant force on objects placed in them

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 discovery of the electron as a subatomic particle was a result of