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3 years ago

6

You are given an unknown liquid and asked to determine its identity. You can measure only one physical property. You decide to h

eat the liquid. You record that the liquid turns to vapor at 100°C. This demonstrates which physical property?
A.
melting point

B.
boiling point

C.
ability to conduct electricity

D.
malleability

1 answer:

11Alexandr11 [23.1K]3 years ago

4 0

B boiling point because you used heat and it turned to vapor so it was boiled

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In young’s double slit experiment, the measured fringe width is 0.5 mm for a Sodium light of 589 nm at a distance of 1.5 m. A br

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Answer:

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Given that,

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Distance of screen and slit D = 1.5 m

Distance of bright fringe y = 1 cm

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$\lambda=\dfrac{dy}{mD}$

$m=\dfrac{d y}{\lambda D}$

Put the value into the formula

$m=\dfrac{1\times10^{-2}\times0.5\times10^{-3}}{589\times10^{-9}\times1.5}$

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(B). We need to calculate the width of the bright fringe

Using formula of width of fringe

$\beta=\dfrac{yd}{D}$

Put the value in to the formula

$\beta=\dfrac{1\times10^{-2}\times0.5\times10^{-3}}{1.5}$

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Answer:

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After solving this,

h = 2.15 m

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b)

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$h' = \frac{2.35 \times 10^{-3}}{ area} \\\\ h' = \frac{2.35 \times 10^{-3}} { 66.2 \times 10^{-4}}$

h' = 0.355 m

Now let us assume the pressure at the bottom is Pb'

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Answer:

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Explanation:

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$A=2(lb+bh+hl)$

Put the value into the formula

$A=2(0.3\times0.5+0.25\times0.5+0.5\times0.3)$

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3 years ago