A power station burns 75 kilograms of coal per second. Each kg of coal contains 27 million joules of energy.
a. What is the total power of this power station in watts? (watts = joules/second)
b. The power station’s output is 800 million watts. How efficient is this power station?

Which of these describe conduction transfer of heat between two objects that are touching transfer of heat by the actual movement of war matter the process in which energy is imitated by one of the object transmitted through space and absorbed by another a process in which energy is released by the molecules breaking apart

Describe the path of a ray that approaches a mirror parallel to the principal axis.

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.