Two point masses m and 3m are placed at a distance l apart. another point mass m is placed in between on the line joining them so that the net gravitational force acting on it due to masses m and 3m is zero. the magnitude of gravitational force acting due to mass m on mass m will be

Gravitational force acting on mass m due to mass M can be calculated by formula:

F = GMm/r²

where,

F is the gravitational force

G is the gravitational constant which is equal to 6.67x10∧-11

M and m are the masses of given objects

r is the distance between point masses M and m.

From the given condition, when the mass m is placed such that net gravitational force acting on it due to masses M and 3M is zero, we have:

r= L/3

therefore,

F= 9GMm/L²

The magnitude of force acting due to mass M on mass m will be 9GMm/L².

the reason is because the moon has some form of gravity, and that gravity pulls the ocean tides.

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: