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kirkhester1
26.08.2019 •
Physics
A700-watt gasoline engine and a 300-watt electric motor both do 3 j of work. which machine can do the work faster? explain your answer.
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Ответ:
What define time of execution of a work is power.
If gasoline engine has 700 W so it is faster than electric motor that has only 300 W
Ответ:
C:Less than 45 centimeters, as the ball transforms some of its potential energy into thermal energy and sound energy
Less than 45 centimeters, as the ball transforms some of its potential energy into thermal energy and sound energy.
Although the initial energy (potential energy is preserved), the energy of deformation as the ball strikes a surface creates energy dissipation in the form of frictional heat and audible sound energy.
Every time the ball bounces, its height will be less than its previous height.
Explanation: