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A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What's the efficiency of the machine? A. 92 percent B. 97 percent C. 96 percent D. 94 percent
A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. The efficiency of the machine is 94 % Efficiency =Output /Input =3760 /4000 *100 = 94 %
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Asked 6/17/2019 9:26:49 AM
Updated 75 days ago|5/17/2021 3:28:42 PM
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A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. The efficiency of the machine is 94 % Efficiency =Output /Input =3760 /4000 *100 = 94 %
Added 75 days ago|5/17/2021 3:28:42 PM
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An object with a mass of 120 kilograms is moving at a velocity of 60 m/s. What is its momentum? A. 2 kg-m/s B. 7,200 kg-m/s C. 0.5 kg-m/s D. 3,600 kg-m/s
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Updated 7/14/2019 1:54:02 PM
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An object with a mass of 120 kilograms is moving at a velocity of 60 m/s. Its momentum is 7,200 kg-m/s.

120 * 60 m/s = 7200
Added 7/14/2019 1:54:02 PM
This answer has been confirmed as correct and helpful.
Confirmed by Sting [7/14/2019 2:02:40 PM]
A figure skater skating across ice, who grabs another skater and brings him along the ice with her, is an example of what type of collision? A. Elastic collision B. Parallel collision C. Mass collision D. Inelastic collision
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Updated 205 days ago|1/7/2021 7:50:03 AM
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A figure skater skating across the ice, who grabs another skater and brings him along the ice with her, is an example of Inelastic collision.
Added 205 days ago|1/7/2021 7:50:03 AM
This answer has been confirmed as correct and helpful.
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