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ioda
4 years ago
8

In most cases, what happens to a liquid when it cools?

Physics
1 answer:
erik [133]4 years ago
7 0

Answer:

Option (A) and (F)

Explanation:

As the liquid cools down, it means the temperature decreases the density of the liquid increases in most o the cases.

Now the volume is inversely proportional to the density of substance so density increases.

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Force=Mass*acceleration

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What is the wavelength of an X-ray photon with energy 8.0 keV (8000 eV)? (1 eV = 1.60 × 10−19 joule.)
katrin2010 [14]

Answer:

Wavelength = 0.15 nm

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We have given photon energy E = 8 KeV = 8000 eV

In question it is given that 1eV=1.6\times 10^{-19}J

So 8000eV=1.6\times 8000\times 10^{-19}=12800\times 10^{-19}j

Plank's constant h=6.6\times 10^{-34}js

We know that photon energy is given by E=h\nu

So 12800\times 10^{-19}=6.6\times 10^{-34}\nu

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