What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling directly toward the ship at 4.95 m/s ?

Explanation:

The difference in frequency can be calculated using the formula

f= source frequency from the ship

v'= speed of the wave reflected from the whale = 4.95 m/s

v= speed of the ship.

since, the source frequency and speed of the ship data is missing, calculation of difference in frequency not possible.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

truck y has a greater velocity than truck x.