I will try to define the net problem, without the intermediate message between the message as:
<em>An air-filled toroidal solenoid has a mean radius of 15.5 cm and a cross-sectional area of 4.95 cm2 . When the current is 12.5 A , the energy stored is 0.390 J . </em>
<em>Part A: How many turns does the winding have?</em>
To solve the problem it is necessary to apply the concepts related to the storage of energy in an inductor and how it is possible to calculate from the inductance the number of turns of the system.
By definition we know that the energy stored in an inductor is given by,
Where,
L = Inductance
I = Current
In this way, clearing the Inductance in the previously given equation we have to
In a system the inductance is given by
Where l represents the length, however as we deal with the perimeter of a circle we have,
Replacing our values we have
Re-arrange to find N,
Therefore the winding have 2211turns
Answer:
the potential energy is 114 J.
Explanation:
Given;
total mechanical energy, E = 400 J
kinetic energy, K.E = 286 J
The potential energy is calculated as follows;
E = K.E + P.E
where;
P.E is the potential energy
P.E = E - K.E
P.E = 400 J - 286 J
P.E = 114 J
Therefore, the potential energy is 114 J.
Use a net with not too large holes, yet not too small holes.
Hence, the small beefs with fall out, and the large ones will remain in the sieve/net.
The force used to kick the ball is 1000N
The mass of the ball is 0.8 kg
Time is 0.8 seconds
Therefore the velocity can be calculated as follows
F= Mv-mu/t
1000= 0.8(v) - 0.8(0)/0.8
1000= 0.8v- 0.8/0.8
Cross multiply both sides
1000(0.8) = 0.8v
800= 0.8v
divide both sides by the coefficient of v which is 8
800/0.8= 0.8v/0.8
v= 1000m/s
Hence the velocity is 1000m/s