which pair of rays would be part of a ray diagram showing reflection? - a & b which pair of rays would be part of a ray diagram showing refraction? c & a

If the light undergoes refraction at the interface, then the event is described by the rays A and C .

If the light undergoes reflection at the interface, then the event is described by the rays A and B .

Oops.  I see that these are answers.  Somehow I must have stumbled onto the set of Jeopardy.

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:

in physics zero. in muscle fatigue could be high