Both a siren passing by and radar exhibit the Doppler effect. What is the main difference between these two technologies?
A. Radar absorbs sound waves, and the siren reflects them.
B. Radar uses sound waves, and the siren uses radio.
C. Radar reflects sound waves, and the siren absorbs them.
D. Radar uses radio, and the siren uses sound waves.

D. Radar uses radio, and the siren uses sound waves.

Explanation:

The main difference between the siren passing by and the radar is that radar uses radio waves and siren uses sound waves.

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

a