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2 years ago

the resistance of a wire of length 80cm and of uniform area of cross-section 0.025cmsq., is found to be 1.50 ohm. Calculate spec

ific resistance of wire in SI units, Help please

Physics

1 answer:

vivado [14]2 years ago

3 0

$Specific\ resistance\ =resistivity\\
From\ formula\ on \ resistance:\ R= \frac{pL}{A}\ p-resistivity,\ L-length,\\ A-area\ of\ cross\ section\\
p= \frac{R*A}{L}= \frac{1,5Ohm*0,025*10^{-4}m^2 }{80* 10^{-2}m }=0,0003515625 Ohm*m$

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5 months ago

The same force is applied to two skateboards. One rolls across the room and the other moves a few feet and comes to a stop. Wher

igor_vitrenko [27]

The longer you spend reading and thinking about this question,
the more defective it appears.

-- In each case, the amount of work done is determined by the strength
of the force AND by the distance the skateboard rolls while you're still 
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2 years ago

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Alexxx [7]

Answer:

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2 years ago

A sealed test tube traps 25.0 cm3 of air at a pressure of 1.00 atm and temperature of 18°C. The test tube’s stopper has a diamet

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Answer:

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First we start by finding the area of the stopper.

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Next we find the force on the stopper

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P - 101325 = 10/1.767*10^-4

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P1/T1 = P2/T2, and when we substitute the values, we have

101325/(273 + 18) = 157918/ T2

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