Answer:
c) The pitch of the two sirens sounds the same to you
Explanation:
The pitch does not depend on the distance of the object from the observer.
As per the given data
pitch = frequency
Frequency = 
= 
Hence, the pitch of the two sirens remains the same for the observer.
Answer:
A) the pressure could crush the submarine
Explanation:
- The submarines are mainly used for defense purposes.
- In world war 1 and 2 the submarines played a vital role in the war.
- The submarines work according to the principle of buoyancy.
- According to this principle, when seawater is filled inside the tank in a required amount, the submarines sink.
- When the seawater is expelled, the submarine rises to above the sea.
- Most of the time, it dives deep into the sea, the hydrostatic pressure should be taken into account.
- If the hydrostatic pressure is not considered, the pressure could crush the submarine.
Answer:
5s
Explanation:
-A period is the time it takes to make one full back-and-forth swing.
-A period is calculated as the time taken for a complete swing divided by one cycle:
Hence, the period of the pendulum is 5s
Answer:
2m/s^2
Explanation:
we can use this formula to get the answer:
(vf - vi) / t = a
Since vf= 10m/s, vi=0m/s, and t=5
We can just substitute the values into the formula to get the result
that is:
(10 - 0) / 5 = 2m/s^2
Answer:
Unit of work done is Joule. Therefore, the dimension formula of work is represented as [M1 L2 T-2].Explanation:
