Set 2.
1. Do the particles of the medium move on from one place to another in medium? (from sound)
2. find the energy in kilowatt hour consumed in 10 hour by a machine of power 500 Watt.
3. what is the work done on a body moving in a circular path (5 mark Q).
Answers
Answered by
4
1) yes
2) As power = work/time
energy = power × time = 500/1000 × 10
= 5 kwh
3) As in circular path torque acting is 0
So work done on a body is0
2) As power = work/time
energy = power × time = 500/1000 × 10
= 5 kwh
3) As in circular path torque acting is 0
So work done on a body is0
Answered by
14
⭐⭐⭐⭐⭐ ANSWER ⭐⭐⭐⭐⭐
1] Yes, the particles of the medium start vibrating about their mean positions due to which we notice production of sound since sound is produced by vibrations. But everytime the motion of medium particles may not be observed. The sound wave however propagates in the form of longitudinal wave through a specific medium.
2] Energy = [(500×10)/1000] kWh
= [5000/1000] kWh
= 5 kWh
3] Consider a body continuously moving on a circular path. Then it results in zero velocity. Since the person always returns to its original position, no displacement is there even if some force acts on it. Thus, work done is getting zero only for the displacement becoming zero.
⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐
1] Yes, the particles of the medium start vibrating about their mean positions due to which we notice production of sound since sound is produced by vibrations. But everytime the motion of medium particles may not be observed. The sound wave however propagates in the form of longitudinal wave through a specific medium.
2] Energy = [(500×10)/1000] kWh
= [5000/1000] kWh
= 5 kWh
3] Consider a body continuously moving on a circular path. Then it results in zero velocity. Since the person always returns to its original position, no displacement is there even if some force acts on it. Thus, work done is getting zero only for the displacement becoming zero.
⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐
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