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lubasha [3.4K]
3 years ago
12

When a kettle is placed on the stove and water begins to boil, the hotter water at the bottom begins to rise and the cooler wate

r above it begins to sink. What do we know about the relationship between the hotter water and the cooler water?
Chemistry
2 answers:
4vir4ik [10]3 years ago
8 0

The hotter water is less dense and rises. The cooler water then sinks because it is more dense.

navik [9.2K]3 years ago
5 0

Answer:

Hotter water is less dense than cooler water.

Explanation:

When we increase the temperature of water (we are not talking about ice and water as the density of water increases from 273.15K to 277.15 K, and then start decreasing) its density decreases due to more inter-molecular spaces between the molecules. With increase in temperature the kinetic energy of molecules increases which increases space and thus density decreases (volume increases).

Thus hotter water is less dense and rise up while cooler water is more dense and sinks down.

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(a)  7.11 x 10⁻³⁷ m

(b)  1.11 x 10⁻³⁵ m

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(a)  The de Broglie wavelength is given by the expression:

λ = h/p = h/mv

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(b) For this part we have to use the uncertainty principle associated with wave-matter:

ΔpΔx > = h/4π

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Δx = h/ (4π m Δv ) = 6.626 x 10⁻³⁴ J·s / (4π x 105.33 kg x 0.045 m/s )

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This calculation shows us why we should not be talking of wavelengths associatiated with everyday macroscopic objects for we are obtaining an uncertainty of 1.11 x 10⁻³⁵ m for the position of the fullback.

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