A home has fifteen 100 W light bulbs. During Energy Conservation week, these are replaced with 20W LED light bulbs. If these lights are on 12 hours per day, seven days per week, and the cost of electricity is $0.24 per KWH, what is the annual savings

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?