Answer:

or

Explanation:
As we know that the beat frequency is given as

here we know that


now we have

now we have

so we have

or

The momentum does not change because he is going the same speed just a different way.
The generator/dynamo<span> is made up of stationary magnets (stator) which create a powerful magnetic field, and a rotating magnet (rotor) which distorts and cuts through the magnetic lines of flux of the stator. When the rotor cuts through lines of magnetic flux it makes electricity.</span>
12 is correct
Explanation: it's a cube
Answer:
Force, F = 2356.19 N
Explanation:
Given that,
Diameter of the circular tip, d = 1 mm = 0.001 m
Its radius, r = 0.0005 m
Pressure created, 
To find,
Force exerted on the nail.
Solution,
The pressure exerted by an object is equal to the force acting per unit area. Its formula is given by :



F = 2356.19 N
Therefore, the force exerted on the nail is 2356.19 N.