Answer:
A. Particles in air move in circles as the wave moves forward.
B. Particles in air move forward but not backward as the wave moves
forward.
C. Particles in air move up and down as the wave moves forward.
✔ D. Particles in air move forward and backward as the wave moves
forward.
Explanation:
The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate. The bigger the vibrations the louder the sound.
Answer:
800J
Explanation:
Using the formula for change in the internal energy of a system
∆U = Q - W
Q = heat added to the system
W =workdone by system.
We know the process is an adiabatic one then, there no addition/ removal of heat, then Q= 0
(∆U = -W )
Then substitute for W, we have
∆U = -[-800]
∆U= 800J
∆U = 800J
