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USPshnik [31]
3 years ago
7

A spring is stretched 2.0 cm. If the same spring is stretched 8.0 cm the ratio of the second and first potential energies of the

spring is
16
9
4
1
Physics
1 answer:
jok3333 [9.3K]3 years ago
6 0
Potential energy of spring equals K times X squared divided by 2 where X is displacement

4 times squared equals 16

choose 1st answer
 
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he magnetic flux through a loop of wire decreases from 1.7 Wb to 0.3 Wb in a time of 0.4 s. What was the average value of the in
Pani-rosa [81]

Answer:

Induced emf through a loop of wire is 3.5 V.

Explanation:

It is given that,

Initial magnetic flux, \phi_i=1.7\ Wb

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We need to find the average value of the induced emf. It is equivalent to the rate of change of magnetic flux i.e.

\epsilon=-\dfrac{\phi_f-\phi_i}{t}

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Amanda [17]

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Explanation:

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3 years ago
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If you ride quickly down a hill on a bicycle your eardrums are pushed in before they pop back. Why is this?
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