Answer:
What does ur question mean can u explain me
B. 1520 is the difference between their weights.
Are
you familiar with that?
Answer:
C. f = 440 Hz
Explanation:
- In any wave, there is a fixed relationship between the wavelength (distance between two sucesive crests), the frequency (number of cycles per unit time) and the perturbation speed, as follows:

where v = speed of the wave
λ = wavelength
f = frequency
- Replacing by the givens in (1) and solving for f, we have:

Answer:
Internal energy will be 
Explanation:
We have given that initial volume 
And final volume 
Pressure 
Now change in volume 
We know that change in internal energy is given by
, here we know that
Work done 
So 