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Tanya [424]
3 years ago
6

An alarm clock draws 0.5 A of a current when connected to a 120 volt circuit. Calculate its resistance

Physics
1 answer:
Hitman42 [59]3 years ago
5 0

<u>Resistance = (voltage) / (current)</u>

Resistance = (120 V) / (0.5A) = <em>240 ohms</em>


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Explanation:

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If the sprinter accelerates at that rate for a distance of 15 m, and then maintains the velocity he has at that point for the re
ahrayia [7]

Answer:

The time for the entire race is 11.39 sec.

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Using equation of motion

s=ut+\dfrac{1}{2}at^2

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15=0+\dfrac{1}{2}\times3.4\times t^2

t^2=\dfrac{30}{3.4}

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Using equation of motion again

v=u+at

Put the value into the formula

v=0+3.4\times2.97

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d=100-15=85\ m

The sprinter need to covers only 85 m.

We need to calculate the time

Using formula of time

t=\dfrac{d}{v}

Put the value into the formula

t'=\dfrac{85}{10.09}

t'=8.42\ sec

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