Physics, 04.08.2019 00:30, natetheman7740
Assume that you heat your home with a heat pump whose heat exchanger is at t_{\rm c} = 2^\circ {\rm c}, and which maintains the baseboard radiators at t_{\rm h} = 47 ^\circ {\rm c}. if it would cost $1000 to heat the house for one winter with ideal electric heaters (which have a coefficient of performance of 1), how much would it cost if the actual coefficient of performance of the heat pump were 75% of that allowed by thermodynamics?
Answers: 1
Physics, 21.06.2019 21:20, KillerSteamcar
The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race
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Physics, 22.06.2019 11:00, sudotoxic
Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?
Answers: 2
Physics, 22.06.2019 13:40, naylorkanari54
Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these
Answers: 1
Assume that you heat your home with a heat pump whose heat exchanger is at t_{\rm c} = 2^\circ {\rm...
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