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vesna_86 [32]
3 years ago
12

An electromagnet is created using a battery, an insulated copper wire and an iron nail. The wire is wrapped around the nail 20 t

imes and attached to the battery. Which pair of changes will definitely increase the strength of the electromagnet?
Physics
1 answer:
Molodets [167]3 years ago
4 0
I think adding more loops would strengthen it
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A 150 N boy rides a 60 N bicycle a total of 200 m at a constant speed. The frictional force against the forward motion of the bi
soldier1979 [14.2K]

Answer:

W = 7000 J

Explanation:

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            F -fr = 0

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where F is the force applied by the child

Work is defined by

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in this case the child's force is parallel to the movement, therefore the angle is zero and cos 0 = 1

           

let's calculate

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8 0
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