Answer:
Max height= 36000 meters
Total Time = 120 seconds
Explanation:
0 = U - at
U = at
U= 20*60
U= 1200 m/s
MAX altitude would be
(U²Sin²tita)/2g
Max height= 1200² *( SIN90)²/(2*20)
Time of FLIGHT
2 * 1200/20
2400/20
120 sec
onds
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Answer: 2,464m
Explanation:
Echo made by a source is dependent on the velocity of the sound in air/water, the distance between the source and the reflector and the time taken
Using the echo formula
2x = vt
Where x is the distance between the source and the reflector
v is the velocity of the sound in sea water is approximately= 1540m/s (This varies from place to place and depending on the season and nature of water)
t is the time taken
t = 3.20s
Substituting this datas into the equation to get 'x'
2x = 1540 × 3.20
x = 1540×3.20/2
x = 2,464m
The distance between the object creating the echo is 2,464m
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