On the International Space Station, an object with mass m = 360 g is attached to a massless string L = 0.71 m. The string can handle a tension of T = 9.8 N before breaking. The object undergoes uniform circular motion, being spun around by the string horizontally.
What is the maximum speed v the mass can have before the string breaks? Give your answer in units of m/s.

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:

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

i don't understand. explain it clearly