A 54 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 15.8
m vertically above the final point B.
The acceleration of gravity is 9.81 m/s?.
15.8 m
a) Find the difference in gravitational po-
tential energy associated with the skier at the
points A and B if the zero level for gravita-
tional potential energy is at point B.
1. 6780.67
2. 10218.1
3. 8794.67
4. 2672.44
5. 6528.56
6. 9503.93
7. 2866.87
8. 8994.79
9. 3005.29
10. 8369.89
Answer in units of J.

b.

explanation:

10.0

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 answer would be c

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