miyuki9
May20-03, 03:46 PM
I'm learning about waves, frequency, vibration, beats,... Then I have to answers a bunch of question from the worksheet...and here are some questions that I don't get and don't know how to answer them, plz help me out...Thanks
1)Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band?
2)What 2 physics mistakes occur in a science fiction movie when you see and hear at the same time a distant explosion in outer space?
3)If the handle of a tuning fork is held solidly against a table, the sound becomes louder.
Why? How will this affect the length of the time the fork keeps vibrating? Explain using the LAW OF ENGERGY CONSERVATION.
4)Suppose a piano tuner hears 2 beats per second when listening to the combined sound from her tuning fork and the piano note being tuned. After slightly tightening the string, she hears 1 beat per second. Should she loosen or shoud she further tighten the string?
I think the answer for this one is that she should loosen the string... but I'm not exactly sure and don't know why..." Plz explain to me. Thanks
1)Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band?
2)What 2 physics mistakes occur in a science fiction movie when you see and hear at the same time a distant explosion in outer space?
3)If the handle of a tuning fork is held solidly against a table, the sound becomes louder.
Why? How will this affect the length of the time the fork keeps vibrating? Explain using the LAW OF ENGERGY CONSERVATION.
4)Suppose a piano tuner hears 2 beats per second when listening to the combined sound from her tuning fork and the piano note being tuned. After slightly tightening the string, she hears 1 beat per second. Should she loosen or shoud she further tighten the string?
I think the answer for this one is that she should loosen the string... but I'm not exactly sure and don't know why..." Plz explain to me. Thanks