3. in approximately 450 b. c. the greek philosopher stated, “the unexamined life is not worth living.” explain in your own words what he meant by this statement

Socrates' statement means that he preferred to die rather than live under the rules and conditions of others, and not be able to investigate.

The Greek philosopher said this expression after he was sentenced to death. Actually, he was forced to choose between death and exile. He selected to die because he considered that living without being permitted to do research was not worthy.

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: