Answer : The correct option is, (4)
Solution :
The relation between the frequency and time period is that the frequency is inversely proportional to the time period.
It is written as,
where,
= frequency of the sound wave = 340 Hz =
T = time period of a sound wave = ?
Now put all the given values in the above expression, we get the time period of the a sound wave.
Therefore, the period of a sound wave is,
There will be less green house gases released into the atmosphere, and this will decrease the rapid rate of climate change. And fracking fluid injected into the ground water reserves will decrease.
Machine does work with one motion true. for example wind fan
Answer:
Impulse = 48 kg m/s
Gain in momentum = 48 kg m/s
Explanation:
Force (F) = 6N
Time (t) = 8
Mass (m) = 3 kg
Final velocity (v) = ?
Initial velocity (u) = 0 m/s
First, find acceleration
F = m * a
a = F / m
a = 6 / 3
a = 2 m/s^2
Now, find final velocity
v = u + a * t
v = 0 + 2 * 8
v = 16 m/s
Now, find impulse
Impulse = change in momentum
Impulse = final momentum - initial momentum
Impulse = m * v - m * u
Impulse = m ( v - u )
Impulse = 3 ( 16 - 0 )
Impulse = 48 kg m/s
Here, gain in momentum is same as impulse.