Question

hi guys
please answer the question
question no. 19
step by step​
I will follow u

Answer 1

Answer:

2000m, 26.1s

Explanation:

Depth = h

t = 20 sec

h = (1/2)gt^2

h = 1/2 (10) (20)(20)

h = 2000 m

sound speed = 330 m/s

now time = distance / speed

sound time = 2000/330 = 6.06 ~ 6.1 sec

total time = pebble reaching time + sound reaching time

total time = 20 + 6.1 = 26.1 sec

Answer 2

Answer:

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