Consider an object with the weight of 60.0 N sitting at rest on a shelf that is 5.00 m high. which of the following statements is true about the object? a) The object has both kinetic and potential energy

b) The object has neither kinetic or potential energy

c) The object has all gravitational potential energy

d) The object has all kinetic energy

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.