raerea2005

29.01.2020 • 

Physics

Awire is wrapped multiple times around a galvanized or aluminum nail and then each end of the wire connected to a battery for some period of time. what happens when the nail is then positioned next to a paper clip and why

a)the paper clip is repelled away from the nail because an electromagnetic field magnetized the nail

b)the paper clip is attracted toward the nail because an electromagnetic field magnetized the nail

c)no effect at all on the paper clip from the wire or the nail

d)the paper clip straightens out because of ohm's law

Ответ:

Jroc23

16.01.2022

Physics

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A)the paper clip is repelled away from the nail because an electromagnetic field magnetized the nail

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Ответ:

cody4976

31.12.2021

Physics

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c. is more than that of the fluid.

Explanation:

This problem is based on the conservation of energy and the concept of thermal equilibrium

m= mass

s= specific heat

\DeltaT=change in temperature

let s1= specific heat of solid and s2= specific heat of liquid

then

Heat lost by solid=

Heat gained by fluid=

Now heat gained = heat lost

therefore,

1000 S_2=800 S_1

S_1=1.25 S_2

so the specific heat of solid is more than that of the fluid.

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