# Someone please help me with this.

The speed of ocean waves depends on their wavelength Î» (in meters) and the gravitational field strength g (in m/sË†2) in this way:

V=KÎ»Ë†p GË†q

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

This is a dimensional analysis problem. If g and Î» 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 * Î»^-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 Î»^1/2 g^1/2