Because aluminum is not made out of the same material as a magnet would be
They differ because they are transverse wave. That is their direction of travel is perpendicular to its vibrations.
1935.5 N is the "net force" acting on a car.
<u>Explanation</u>:
Given that,
Mass of the car is 790 kg.
Velocity of the car is 7 m/s. (v)
It turned around with 20 m. (r)
We know that, Net force = m × a




Now, Net force = m × a
Net force = 790 × 2.45
Net force = 1935.5 N
The answer is C. You must divide your wavelength and your frequency to get your answer.