Answer: force, force
Explanation:
Newton’s third law states that there and equal and opposite force on an object.
I took the test as well
Answer:
Medium
Explanation:
A mechanical wave moves through any medium, meaning any physical matter. A medium can be any state of matter, such as a liquid, gas or solid. An example of a mechanical wave is sound, which is the vibration of matter.
Answer:
(a) 1782 Hz (b) 2178 Hz
Explanation:
The predominant frequency =1980 Hz
The speed of the police car =34.3 m/sec
The speed of sound in air =343 m/sec
(a) When the car moves towards you
According to Doppler's effect
(b) When the car moves away from you
<span>Ναί is yes
</span>xéro is know