Physics, 22.11.2019 15:31 mathamaticlly
1. when a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy.
true or false
2. the outward evidence for this transformation can be seen only in the mechanical motion of the motor.
true or false
3. what is true of the efficiency of this motor?
a. it is more than 100% efficient
b. it is 100% efficient
c. it is less than 100% efficient
d. none of the above
Answers: 2
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Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)
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Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h
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1. when a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy...
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