Tech A says never use a water hose to clean up dust after a repair. Tech B says never use a floor scrubber to clean up dust after repairs. Who is correct?

You are considering the purchase of a heat pump system with aresistive heating element in the air-handler for back-up during the extra cold winter months when the temperature is below the heat pump's capability.

N2 flows through an insulated horizontal tube at steady state. With an inlet temperature of 150°C and a velocity change from 2 m/s to 50 m/s, what is the exit temperature?

Some engineers have developed a device that provides lighting to rural areas with no access to grid electricity. The device is intended for indoor use.

Which type of energy source is usually used by ferries and airplanes?

500 flights land each day at San Jose's airport. Assume that each flight has a 5% chance of being late, independently of whether any other flights are late. Using Excel, calculate the probability of the following events. Turn in your spreadsheet.

7 Single-use earplugs require a professional fitting before they can be used. A True B) False

Electric power is to be generated by installing a hydraulic turbine-generator at a site 138 m below the free surface of a large water reservoir that can supply water at a rate of 2400 kg/s steadily. Determine the power generation potential.

When the French horn plays with brass instruments, then it is played very softly to match the texture. True/False

You're running an engine and seeing that it is exhausting blue smoke. Which is likely to be the problem?

To do a research, a researcher needs to be clear about what he/she is doing, why he/she is doing it and the associated implications of what he/she is about to do. A. True B. False