A diagram of a closed circuit with a power source on the left labeled 120 V. There are 3 resistors in parallel, separate paths, connected to it labeled 8.0 Ohms, 10.0 Ohms and 15.0 Ohms.

What is the equivalent resistance in this parallel circuit?

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 independent variable, or the one that is intentionally manipulated is the speed.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray