Amount of heat as a refrigerator
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?
Expected delivery within 24 Hours
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.)
A Carnot heat engine receives heat from a reservoir at 900 degrees Celsius at a rate of 800kJ/min and rejects the waste heat to the ambient air at 27 degrees Celsius.
Determine the required volume of the cuts and fills for a new road, using the average-end-area-method.
A blackened plate is exposed to the sun so that a constant heat flux of 800 W/m^2 is absorbed. The back side of the plate is insulated so that all the absorbed energy is dissipated into the airstream.
Determine the amount of excavation needed for the basement. A 2 foot working distance is required and the excavation will be sloped 1.5:1.
In a physics lab experiment, a spring clamped to the table shoots a 19g ball horizontally. When the spring is compressed 21cm , the ball travels horizontally 5.0m and lands on the floor 1.6m below the point at which it left the spring.
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The trolley problem primarily explores the tension between: Answer: a) Individual rights and collective welfare Feedback
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