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levacccp [35]
3 years ago
13

PLEASE HELPPP!! 40 POINTS! A young man exerted a force of 900 newtons for 10 seconds to push his car. However, he could not get

the car to move. How much work did he do?
9000 Joules

90 Watts

no work is done

90 joules

9000 watts
Physics
1 answer:
Dmitrij [34]3 years ago
4 0

No work is done because the object needs to be moved. The formula for work is Work = Force x Distance.

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A solenoid of length 0.35 m and diameter 0.040 m carries a current of 5.0 A through its windings. If the magnetic field in the center of the solenoid is 2.8 x 10⁻² T, what is the number of turns per meter for this solenoid?

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the number of turns per meter for the solenoid is 4.5 x 10³ turns/m.

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Given;

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The number of turns per meter for the solenoid is calculated as follows;

B =\mu_o  I(\frac{N}{L} )\\\\B =  \mu_o  I(n)\\\\n = \frac{B}{\mu_o I} \\\\n = \frac{2.8 \times 10^{-2}}{4 \pi \times 10^{-7} \times 5.0} \\\\n = 4.5 \times 10^3 \ turns/m

Therefore, the number of turns per meter for the solenoid is 4.5 x 10³ turns/m.

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