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uranmaximum [27]
3 years ago
9

A step-down transformer providing electricity for a residential neighbor-hood has exactly 2680 turns in its primary. when the po

tential differenceacross the primary is 5850 v, the potential difference at the secondary is120 v. how many turns are in the secondary?
Physics
1 answer:
Fynjy0 [20]3 years ago
6 0
The turns ratio is equal to the voltage ratio. Let n1 and n2 be the primary and secondary turns. Then
5850V/120V=n1/n2
48.75=2680/n2
n2=2680/48.75
n2=55
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gavmur [86]

Answer:

it's because some versions have more steps and others have less

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2 years ago
Your grandmother enjoys creating pottery as a hobby. She uses a potter's wheel, which is a stone disk of radius R-0.520 m and ma
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Answer:

0.54454

104.00902 N

Explanation:

m = Mass of wheel = 100 kg

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t = Time taken = 6 seconds

\omega_f = Final angular velocity

\omega_i = Initial angular velocity

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Mass of inertia is given by

I=\dfrac{mr^2}{2}\\\Rightarrow I=\dfrac{100\times 0.52^2}{2}\\\Rightarrow I=13.52\ kgm^2

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\alpha=\dfrac{\tau}{I}\\\Rightarrow \alpha=\dfrac{\mu fr}{I}\\\Rightarrow \alpha=\dfrac{\mu 50\times 0.52}{13.52}

Equation of rotational motion

\omega_f=\omega_i+\alpha t\\\Rightarrow \omega_f=\omega_i+\dfrac{\mu (-50)\times 0.52}{13.52}t\\\Rightarrow 0=60\times \dfrac{2\pi}{60}+\dfrac{\mu (-50)\times 0.52}{13.52}\times 6\\\Rightarrow 0=6.28318-11.53846\mu\\\Rightarrow \mu=\dfrac{6.28318}{11.53846}\\\Rightarrow \mu=0.54454

The coefficient of friction is 0.54454

At r = 0.25 m

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5 0
3 years ago
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Answer:

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v_2 = Speed of the crate

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