Q. Two horses pull horizontally on ropes attached to a stump. The two forces F1 ⃗⃗⃗⃗ and F2 ⃗⃗⃗⃗ that they apply to the stump are such that the net (resultant) force R⃗ has a magnitude equal to that of F1 ⃗⃗⃗⃗ and makes an angle of 90° with F1 ⃗⃗⃗⃗ . Let F1 = 1300N and R = 1300N also. Find the magnitude of F2 ⃗⃗⃗⃗ and its direction (relative to F1 ⃗⃗⃗⃗ ).

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:

d. platinum would have the greatest temperature increase because it has the lowest specific heat.