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1. a bat flying in a cave emits a sound pulse and receives its echo in 1 sec.how far away is the cave wall?
2.what 2 physics mistake occur in a science fiction movie when you see and hear at the same time a distant explosion in outer space?

2007-02-13 09:46:17 · 4 answers · asked by kobay 2 in Education & Reference Homework Help

4 answers

Being a former teacher, I can not give the answer, but here are some hints:
1. use the speed of sound and work back; d=vt
2. What is the speed of sound? What is the speed of light?

Hope this helps!

2007-02-13 09:51:22 · answer #1 · answered by c21bucks 2 · 0 0

1. find out the speed of sound. Then find out how far sound travels in one second. Divide by two to get the distance from the cave wall.

2. Sound travels slower than light. You would see the explosion before you hear it.

2007-02-13 17:52:49 · answer #2 · answered by Nicole 1 · 0 0

1.the answer is how far sound travels in 1 second divided by 2.
The speed of sound is 770mph or 1238km/h..so it's this divided by 60 divided by 60 divided by 60..divided by 2...
2. speed of light and the speed of sound travel at different rates..in space which is mostly void sound doesn't travel but light not affected by void does..so it would be impossible to hear and see an explosion in space at the same time..unless you were close enough to the explosion where the vibrations of bot were simultaneous..then you wouldn't hear them .you would be demised....like the parrot in the Monty python show..

2007-02-13 18:09:14 · answer #3 · answered by silver44fox 6 · 0 0

1) not enough info
2) light travels faster than sound so they can't occur together

2007-02-13 17:52:00 · answer #4 · answered by dreamgirl 5 · 0 1

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