The rate at which an object moves is called speed or velocity depending if the direction does or doesnt matter
Answer:1384 Hz
Explanation:
Given
wavelength
=0.25 m
Temperature T
at
velocity of sound is 346 m/s
and we know



f=1384 Hz
In phase would mean both waves are at a positive peak, out of phase would mean one is at a positive whilst the other is at a negative. Out of phase would mean the waves cancel each other out
<span>The correct answer is B. Inverted image. This is because of all the lenses and light refractions and what not. The same things happens with our eyes except our brains fix the inverted image automatically. Since there are no brains in a projector, you have to fix it on your own by putting it in reverse.</span>
The last one, Kinetic energy bc it is taking them to school