Assume that the ends of the bar in have been kept at 100°C for a long time. Then at some instant, call it t 0, the temperature at x Lis suddenly changed to 0°C and kept at 0°C, whereas the temperature at x 0 is kept at 100°C. Find the temperature in the middle of the bar att 1, 2, 3, 10, 50 sec First guess, then calculate.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)