Answer:
706.68 N
Explanation:
By Hooke's law,
Using the values in the question,
When e = 0.4 m,
An astronaut is moving in space when a big explosion occurs about 50 metres BEHIND him. How will the astronaut come to know abou
2 answers:
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Answer:
(c) 97 dB sound intensity level
Explanation:
We have given the intensity of the loud car horn
We know that
Now the sound intensity level is given by , which is nearly equal to 97
So the sound intensity level will be 97 dB
So option (c) will be the correct option
Answer:
Explanation:
We could use the following suvat equation:
where
s is the vertical displacement of the coin
v is its final velocity, when it hits the water
t is the time
g is the acceleration of gravity
Taking upward as positive direction, in this problem we have:
s = -1.2 m
And the coin reaches the water when
t = 1.3 s
Substituting these data, we can find v:
where the negative sign means the direction is downward.