The mean free path of an oxygen molecule is 2.0 � 10-5 m, when the gas is at a pressure of 120 pa and a temperature of 275 k. the atomic mass of oxygen is 16.0 g/mol, the boltzmann constant is 1.38 � 10-23 j/k, avogadro's number is 6.02 � 1023 molecules/mole, and the ideal gas constant is j/mol � k = 0.0821 l � atm/mol � k. the radius of an oxygen molecule is closest to
0.28 nm.
0.24 nm.
0.22 nm.
0.26 nm.
0.30 nm.

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:

the inner core.

good luck: )

klicker