Find out the efficiency of the engine
An engine has a hot reservoir temperature of 935 K and a cold reservoir temperature of 616 K. The engine operates at three-fifths maximum efficiency. What is the efficiency of the engine?
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How long would a 2.90 kW space heater have to run to put into a kitchen the same amount of heat as a refrigerator (coefficient of performance = 2.68) does when it freezes 1.73 kg of water at 18.8°C into ice at 0°C?
If the 160-lb person jumps directly off the back of the boat with a velocity of 7 ft/s, determine the resulting velocity of the boat and remaining person.
To deposit 14000 J of heat in the house, the heat pump requires 796 J of work. Determine the temperature of the well water. Give answer in K. Do not enter unit.
Consider a Rankine cycle operating in an ideal reheat mode where the high pressure turbine receives steam at 8MPa and 450 deg. C; the low-pressure turbine is operated at 500kPa ond 500 deg.
A motor car shaft consist of a steel tube 30 mm internal diameter and 4 mm thick .thee engine develops 10kW at 2000r.p.m.Find the maximum shear stress in the tube when the power is transmitted through a 4:1 gearing.
A 95% confidence interval for the true proportion of potatoes in the truck that have major defects is
It takes electricity to run the motor on the refrigerator. If your cost of electricity is 10 cents per kilowatt*hour, how much does it cost (in cents - do not enter units) to cool your lunch down?
A trucking firm delivers appliances for a large retail operation. The packages (or crates) have a mean weight of 305 lb. and a variance of 2916. (Give your answers correct to four decimal places.)
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i. Which of the supervisory techniques were effective? Why? ii. Which supervisory techniques were not effective? Why?
evaluate a professional SPHS-related certification offered by a reputable professional organization which directly relate to your capstone project.
Imagine you have completed research on culturally responsive teaching and how reflective practices can be used to meet the learning needs of all students.
In the lecture notes we explored the concept of followership. Pick one of the topics covered, offer your thoughts, supported by cited evidence,
The Object: To plan and carry out an unstructured observation for 30-60 minutes, in order to develop a hypothesis about leadership behavior
1. Was the U.S. involvement in Korea justified? 2. Did the division of Korea by foreign powers after WWII make another conflict unavoidable?
develop a review of the literature on at-risk areas in Special Education. A review of the literature is not a summary, but rather your evaluations