Why does the gravitational force between earth and moon predominate over electrical forces? the electric force between earth and moon cancels out because they have an equal number of positive and negative charges. the gravitational force between two protons is billions of times stronger than the electrical force. gravitational forces grow exponentially with the number of particles, while electrical forces simply add. the electrical force gets smaller more quickly with distance than the inverse square gravitational force

The electric force between Earth and Moon cancels out because they have an equal number of positive and negative charges.

Explanation:

The electric force between any two objects is given by:

where

k is the Coulomb's constant

q1 and q2 are the net charges present on the two objects

r is the separation between the two objects

Due to the value of k, the electric force is generally much greater than the gravitational force (which is the weakest of the four fundamental forces). However, in this case the electric force between the Earth and the Moon is zero: this is because very large object are always neutral (they do not have a net charge, which means they have an equal amount of positive and negative charge on them). Therefore, since q1 = q2 = 0, the electric force is zero as well.

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 results is a decrease in air temperature with an increase of altitude.

explanation: