You can purchase a 15-watt compact fluorescent lamp for $1 that is rated to last 10,000 hours. this lamp provides the same light output as a 75-watt incandescent lightbulb that costs $0.50 and lasts 1000 hours. based on an electric energy cost of $0.30/kwh, calculate the money saved over the life of the fluorescent lamp by using it instead of the conventional lightbulb. include the cost of the lightbulbs.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false

Plan an experiment to measure the surface tension of a liquid similar to water. if necessary, review the ncfmf video surface tension for ideas. which method would be most suitable for use in an undergraduate laboratory? what experimental precision could be expected?