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2 years ago

Help me Plaese

1 answer:

3 0

get a cylinder that is about maybe 100cm^3
fill it up with about 30cm^3
place the solid into the cylinder.
take the reading - 30 to find the volume of the solid
SI unit of length is meter
255cm=2550mm and 2.55m
about the scientists question: it'll be impossible to carry out experiments as science has to be very precise
1kg=1000g
1 fahrenheit = -17.2 degree celsius
milliliter

hope it helps :) need anything just msg

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Answer:

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The formula to be used here is that of speed.

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2 years ago

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2 years ago

Using 0.500 g of nichrome, you are asked to fabricate a wire with uniform cross-section. The resistance of the wire is 0.673 Ω.

mojhsa [17]

Explanation:

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Volume,

$V=A\times l\\\\A=\dfrac{V}{l}\\\\Since, V=\dfrac{m}{d}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{0.5\times 10^{-3}}{8.31\times 10^3}\\\\V=6.01\times 10^{-8}\ m^3$

Area,

$A=\dfrac{V}{l}\\\\A=\dfrac{6.01\times 10^{-8}}{l}$ ....(1)

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(b) Equation (1) becomes :

$A=\dfrac{6.01\times 10^{-8}}{l}\\\\A=\dfrac{6.01\times 10^{-8}}{0.201}\\\\\pi r^2=3\times 10^{-7}\\\\r=\sqrt{\dfrac{3\times 10^{-7}}{\pi}} \\\\r=3.09\times 10^{-4}\ m$

Hence, this is the required solution.

5 0

3 years ago