Physics, 28.01.2020 20:02 goldengirl4078
Acompany is interested in buying a new machine to replace their outdated equipment. however, before committing to the purchase, the company asks the manufacturer to provide data on a certain machine's efficiency. the data suggests that with a supplied energy at a rate of 1,600 w, the machine will do useful work at a rate of 1,540 w. what's the efficiency of this particular machine?
a. 84.21%
b. 96.25%
c. 103.90%
d. 77.00%
Answers: 3
Physics, 22.06.2019 03:00
If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?
Answers: 2
Physics, 22.06.2019 13:30
6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.
Answers: 2
Physics, 22.06.2019 18:00
Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative
Answers: 3
Acompany is interested in buying a new machine to replace their outdated equipment. however, before...
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