Answer:

Explanation:
From the equation we are told that:
Velocity of French sub 
Velocity of U.S. sub at 
French Wave Frequency 
Velocity of wave 
Generally the equation for Signal's frequency as detected by the U.S. is mathematically given by
Doppler effect



Let's look at Newton's second law
Force is directly proportional towards mass
If mass is more force will be more.
Between baseball and bowling ball Bowling ball has higher mass
So it would expert most force
Option D
The answer is D.<span>longitudinal</span>
Answer:

Explanation:
We are given that


We have to find the new potential difference of the capacitor.
When the capacitor is disconnected then the charge stored in capacitor is constant.
When we introduce material of dielectric constant k between the plates of capacitor then the capacitance of capacitor increases k times.




Using the formula


Hence, the new potential difference 