Increases because the air bubbles are not trapped by the contraption that is blocking their source.
Answer:
B
Explanation:
White dwarf. I love this type of science.
We can find the acceleration as follows:

Answer:
D. 2 m/s^2
Answer:
f' =1064.1025 Hz
Explanation:
We know that from doppler's effect

f'= observed frequency
f= actual frequency =1000 Hz
v= velocity of sound waves = 332 m/s
v_o= velocity of observer =0
v_s= velocity of source. ( let velocity of car be 20 m/s)
therefore,

f' =1064.1025 Hz
Answer:
30 N
Explanation:
From Newton's second law:
F = ma
F = (10 kg) (3 m/s²)
F = 30 N