Physics, 15.11.2019 05:31, deanlmartin
An elevator is rising at constant speed. consider the following statements: i. the upward cable force is constant ii. the kinetic energy of the elevator is constant iii. the gravitational potential energy of the earth-elevator system is constant iv. the acceleration of the elevator is zero v. the mechanical energy of the earth-elevator system is constan
Answers: 2
Physics, 21.06.2019 23:30, kaytonleeb
The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s
Answers: 2
Physics, 22.06.2019 10:50, afonseca73
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.
Answers: 3
An elevator is rising at constant speed. consider the following statements: i. the upward cable for...
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