Answer:
different value to l if n=5 are 0,1,2,3,4
2.14x 1022 kg
the 22 is a xponet of ten
Answer:
The speed of sound is 366.67 m/s.
Explanation:
height, h = 44 m
total time, T = 3.12 s
Let the time taken by the stone to hit the water is t.
use second equation of motion
![h = u t + 0.5 gt^2\\\\44 = 0.5\times 9.8 t^2\\\\t = 3 s](https://tex.z-dn.net/?f=h%20%3D%20u%20t%20%2B%200.5%20gt%5E2%5C%5C%5C%5C44%20%3D%200.5%5Ctimes%209.8%20t%5E2%5C%5C%5C%5Ct%20%3D%203%20s)
Time taken by sound to g up
t'=T - t = 3.12- 3 = 0.12 s
The speed of sound is
![v = \frac{h}{t'}\\\\v = \frac{44}{0.12}\\\\v = 366.7 m/s](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7Bh%7D%7Bt%27%7D%5C%5C%5C%5Cv%20%3D%20%5Cfrac%7B44%7D%7B0.12%7D%5C%5C%5C%5Cv%20%3D%20366.7%20m%2Fs)
A. and C. are both correct. Work is force x distance, and 1 J is 1 N-m .