Ask questions and get helpful answers.

Someone please help me with this.

The speed of ocean waves depends on their wavelength λ (in meters) and the gravitational field strength g (in m/sˆ2) in this way:

V=Kλˆp Gˆq

Where K is a dimentionless constant. Find the value of the exponents p and q.

This is a dimensional analysis problem. If g and λ are the only quantities that can affect the speed (ocean depth is actually another, but we will assume a very deep ocean), then some combination
V * λ^-p * g^-q must be a dimensionless constant, K. The length dimension exponent of the product is 1 -p -q = 0 and the time dimension exponent is -1 +2q = 0.
This leads to -1/2 + q = 0
1/2 - p = 0
p = 1/2 q = 1-p = 1/2
V = K λ^1/2 g^1/2

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩

1 answer

  1. The crests of some swells or waves in the ocean are 20 m apart. As they pass, a boat at anchor bobs up and down every 5 seconds. The frequency and wavelength of the water wave are
    Answer

    5 Hz and 20 m

    0.2 Hz and 20 m

    20 Hz and 5 m

    5 Hz and 4 m.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Answer this Question

Related Questions

Still need help?

You can ask a new question or browse existing questions.