Gy (4th 9 Weeks Spring 2020)

Unit Test

Unit Test Review

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A commercial on television advertises a new medicine to boost immunity. Which source is least likely to provide accurate

information?

a popular culture magazine

the studies that the television ad cites

a brochure from the doctor's office

the Food and Drug Administration's website

a popular culture magazine

Explanation:

A popular cultural magazine would be the least likely source of accurate information about a new medicine that boosts immunity levels.

The most likely sources of accurate information would be the studies that the television ad cites, a brochure from the doctor's office, the Food and Drug Administration's website.

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: