Which ia the best example of potential energy

The best example is when a swing reaches the top of the arc, it has maximum potential energy. Another example is throwing a ball, at the highest point, the potential energy is greatest. A drawn bow also is an example of potential energy.

Explanation:

Energy is the ability to do work. Potential energy is the energy of an object's position or the stored energy (potential to work).

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:

pe = weightxheight = 2000x1000=2,000,000joules