1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Physics wave question

  1. May 29, 2009 #1
    1. The problem statement, all variables and given/known data

    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?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. May 29, 2009 #2
    2. Relevant equations


    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)
  4. May 29, 2009 #3
    but y did u times by 2?
  5. May 30, 2009 #4
    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)
  6. May 30, 2009 #5
    ok great thanks!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Physics wave question
  1. Physics wave question (Replies: 2)

  2. Physics wave question (Replies: 3)

  3. Physics Question: Waves (Replies: 14)