Acertain part of aircraft engine has a volume of
1.3ft3.
(a) find the weight of the piece when it is made ofiron.
(b) if the same piece is made of aluminum, find the weight
anddetermine how much weight is saved by using aluminum instead
ofiron.

419.25 lbs

Explanation:

Let iron density be 491.5 lb/ft3

and aluminum density be 169 lb/ft3

We can calculate the mass of iron that displaces 1.3ft3

Also the mass of aluminum that displaces 1.3 ft3

So by using aluminum, the airplane can save

638.95 - 219.7 = 419.25 lbs of weight

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: