The earth and the moon exert forces on each other, but the moon is roughly one fourth the size and one eightieth the mass of the earth..how does the magnitude of the force the earth exerts on the moon compare to the magnitude of the force the moon exerts on the earth?

Moon and Earth both exert equal force on each other

Explanation:

As we know by the universal law of gravitation the force of gravitation is given by the formula

This is the mutual gravitational force on Earth and Moon by which they attract each other.

So here the force of attraction due to Earth on Moon as well as the Force due to Moon on Earth both will be same in magnitude and opposite in direction.

So here both forces is given as

Moon and Earth both exert equal force on each other

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:

i don't know that i agree with that but what's the question ?