Physics wave question

  • Thread starter roxxyroxx
  • Start date
  • #1
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Homework Statement



the radar on a ship sends out a signal which reflects off a rocky island 1500m ahead of the ship. how much time passes from the time the signal is sent until the reflection is detected?

Homework Equations


???


The Attempt at a Solution


???
 

Answers and Replies

  • #2
15
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2. Homework Equations

t=s/v

3. The Attempt at a Solution

v=c=3.10^8 (m/s)

s=2.1500=3000 (m)

t=3000/3.10^8= 10^-5 (s)
 
  • #3
48
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thanks!
but y did u times by 2?
 
  • #4
15
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Because the signal is reflected, so it must travel 2 times the distant between the island and the ship (sent, reach the island and come back)
 
  • #5
48
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ok great thanks!
 

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