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Jet001 [13]
3 years ago
6

An operating electric circuit consists of a lamp and a length of nichrome wire connected in series to a 12- volt battery. As the

temperature of the nichrome is decreased, what happens to the equivalent resistance of the circuit and the power developed by the lamp?
Physics
1 answer:
Natalka [10]3 years ago
4 0
The resistance of the wire will decrease as its temperature is decreased due to reduced hindrance in the flow of electrons. This means the current will increase. Electric power:
P = I²/R
The power produced will thus increase since the current is increasing and the resistance decreasing.
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Answer:

Impulse, |J| = 0.6716 kg-m/s

Force, F = 63.35 N

Explanation:

It is given that,

Mass of the baseball, m = 0.146 kg

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Final speed of the ball, v = 10.7 m/s

To find,

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Solution,

(a) Impulse of an object is equal to the change in its momentum. It is given by :

J=m(v-u)

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or

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(b) Another definition of impulse is given by the product of force and time of contact.

t = 0.0106 s

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F=\dfrac{J}{\Delta t}

F=\dfrac{0.6716\ kg-m/s}{0.0106\ s}

F = 63.35 N

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