Calculate the net acceleration acting on a 50 kg box being pushed across a horizontal floor. There is a 500 N normal force, a 200 N applied force, and a 60 N force of friction resisting any sliding motion. Assume g = 10 m/s2

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.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

What is the role of lenses in microscopy?