What would be the kinetic energy k2q of charge 2q at a very large distance from the other charges? express your answer in terms of q, d, and appropriate constants?

Explanation:

At the corner of the square, the potential energy of interaction of other charges with the charge 2q  is given by

So

Also, since

The initial energy of the system is given by;

Since

, the final energy of the system is obtained by

From the law of conservation of energy,

Therefore,

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.