PLZ HELP Identify three ways we use analog and digital signals in our everyday lives.

a
Analog signals are used to record video and transmit television signals
b
The wireless router converts digital information from a computer or internet source and transmits it as radio waves, then the computer converts the radio waves back to digital signals
c
A cell phone converts your voice into an electrical (digital) signal, which is then transmitted via radio waves (analog signals) to the nearest cell tower
d
All of the above

Explanation:

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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: