Help please!!! A large rock has a mass of 1,000 kg and is sitting at rest on a frictionless surface. If a bowling ball with a mass of 5 Kg is placed next to the rock, so that the distance between their centers is 1m, what would the acceleration of the bowling ball be? Please identify the action / reaction forces present.

answer; /// the above statement is (true);

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:

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete