Find the power required to drive a 1.5-in power screw having double square threads with a pitch of 1 4 in. The nut is to move at a velocity of 2 in/s and move a load of F 5 2.2 kips. The friction coefficients are 0.10 for the threads and 0.15 for the collar. The frictional diameter of the collar is 2.25 in.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.