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Setler [38]
3 years ago
7

An ice cube floats in a glass of water. as the ice melts, what happens to the water level?

Physics
1 answer:
Norma-Jean [14]3 years ago
3 0
The water level rises, because ice is made of water
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If the force exerted by a man is halved and the distance is multiplied by four, by which factor does the work change ?
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Both retinal disparity and convergence increase as an object gets closer to the individual.
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3 years ago
A transformer is to be used to provide power for a computer disk drive that needs 6.0 V (rms) instead of the 120 V (rms) from th
Ipatiy [6.2K]

Answer:

N_{2}=20 turns

Explanation:

The given case is a step down transformer as we need to reduce 120 V to 6 V.

number of turns on primary coil N_{P}= 400

current delivered by  secondary coil  I_{S}= 500 mA

output voltage = 6 V (rms)

we know that

I_{p}=\frac{V_{out}}{V_{in}\times I_{s}}

putting values we get

I_{p}=\frac{6}{120\times 0.5}

I_{p}= 0.1 A

to calculate number of turns in secondary

\frac{N_{2}}{400} =\frac{6}{120}

therefore, N_{2}=20 turns

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3 years ago
When the activation energy of an exothermic reaction decreases at a given temperature, the reaction rate increases because the _
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