Answer:
f = 687.85 Hz
Explanation:
Given that,
The wavelength of sound wave,
We need to find the frequency of the sound wave. The relation between wavelength and frequency is given by :
v is speed of sound at T = 35°C = 308.15 K
So,
So, the frequency of the sound is 687.85 Hz.
Answer:
Rod will remain horizontal all the time after release.
Explanation:
This is because net torque on the rod about any point in space is zero.
Let assume that distance between the two masses m and 2m is L.
Also m is situated at origin and in positive XY direction.
Then , Center of mass is at L()
COM =
So let us calculate net torque about hinged point which COM.
- Torque because of hinge force is zero because it passes from that point itself.
- Torque on 2m mass is 2mg(L/3) in nenegative Z direction.
- Torque on m mass is mg(2L/3) in positive Z direction.
As both torque are equal and opposite then net torque =0.
Thus it got balanced.
Answer:
The thrown rock will strike the ground earlier than the dropped rock.
Explanation:
<u>Known Data</u>
- , it is negative as is directed downward
<u>Time of the dropped Rock</u>
We can use , to find the total time of fall, so , then clearing for .
<u>Time of the Thrown Rock</u>
We can use , to find the total time of fall, so , then, , as it is a second-grade polynomial, we find that its positive root is
Finally, we can find how much earlier does the thrown rock strike the ground, so
The answer should be Uranus. hope i could help
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