how many crests are in a light wave of frequency 3 x 107 s–1 that travels a distance of 300 m? give your answer to the nearest whole number, but not in scientific notation.

Answer the radiant sun;

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.

The correct answer is waves