A foundry is using a furnace to reheat billets. The furnace maintains a temperature of 1,400°C and is losing heat from a 0.3 m x 0.6 m opening for the billets to enter the furnace. If the ambient temperature is 27°C with an h = 10 W/m2-K, and treating the opening as a blackbody (emissivity of 1) determine the radiation heat loss in W.

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.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

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)