Physics, 20.10.2019 12:30 jeanbeansmith2p2ofty
A. a heat engine converts the flow of heat that results from a difference in temperatures into work. write one or two sentences describing a heat engine that has a low efficiency by comparing the temperatures at which it operates.
b. how could you improve the efficiency of a heat engine by decreasing one of the temperatures at which the heat engine operates?
c. calculate the amount of heat needed to warm 16.1 kg of water from a room temperature of 20.0°c to 60.0°c. show your work.
d. a water heater has an efficiency of 67%. if the water heater takes in 6040 kj of heat to heat up water for a dishwasher, how much total work does it provide? show your work.
e. how much energy is lost to the surroundings while heating the water for one cycle of the dishwasher? show your work.
Answers: 2
Physics, 21.06.2019 21:20
An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.
Answers: 3
Physics, 22.06.2019 15:00
Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.
Answers: 1
Physics, 22.06.2019 17:00
Using proper grammar, spelling, and punctuation, write at least one 5 sentence paragraph describing 3 ways we use the elements of the electromagnetic spectrum (ems) in our everyday lives.
Answers: 2
Physics, 22.06.2019 19:30
The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?
Answers: 1
A. a heat engine converts the flow of heat that results from a difference in temperatures into work....
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