Ahat contains 100 coins, where at least 99 are fair, but there may be one that is double- headed (always landing heads); if there is no such coin, then all 100 are fair. let d be the event that there is such a coin, and suppose that p(d) = 1/2. a coin is chosen uniformly at random. the chosen coin is flipped 7 times, and it lands heads all 7 times.

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:

object 2 because all the other ones are wrong