The earth has a net electric charge that causes a field at points near its surface equal to 150 N/C and directed in toward the center of the earth. The earth has a net electric charge that causes a field at points near its surface equal to 150 N/C and directed in toward the center of the earth.

The charge is -4.05 C.

Explanation:

Given that,

Electric field = 150 N/C

Suppose What charge would a human with a mass of 62.0 kg have to acquire to overcome his or her weight by the force exerted by the earth's electric field?

We need to calculate the charge

Using formula of electric field

Where, Q=charge

r = distance center of the earth

Put the value into the formula

The electric field is directed in toward the center of the earth.

So, the charge is negative.

We need to calculate the charge

Using formula of electric force

Put the value into the formula

Hence, The charge is -4.05 C.

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

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: