A book can have energy by its words by how it’s talking in the book. honestly I’m not too sure that’s just how I would explain it
Answer:
Mass of fish=6.252 kg
Explanation:
Force F=0 N to 250 N
Length x=15.0 cm=0.15 m
Frequency f=2.60 Hz
To find
Mass of fish m
Solution
First we need to find spring constant

As we know that the time period is given as
Answer:

Explanation:
Given the absence of non-conservative force, the motion of the coin is modelled after the Principle of Energy Conservation solely.



The moment of inertia of the coin is:

After some algebraic handling, an expression for the maximum vertical height is derived:




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



Tbh ! All of them have lens but I would go with B.) Smart Phone
Hope This Helps !!!