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3 years ago

The freezing point of water is the same as its a. melting point. b. boiling point. c. sublimation point. d. evaporation point.

Physics

2 answers:

MAXImum [283]3 years ago

8 0

Answer: melting point.

Explanation:

Freezing point is the temperature at which liquid phase changes to solid phase. Freezing point of water is $0^0C$ .

$H_2O(l)\rightarrow H_2O(s)$

Melting point is the temperature at which solid phase changes to liquid phase. Melting point of water is $0^0C$ .

$H_2O(s)\rightarrow H_2O(l)$

Melting and freezing are reversible processes which takes place at $0^0C$ for water.

Boiling point is the temperature at which vapor pressure of the liquid becomes equal to atmospheric pressure.

Sublimation point is the temperature at which gaseous phase changes to solid phase.

Thus the freezing point of water is the same as its melting point.

algol [13]3 years ago

6 0

A. Melting point .. I learned this today in class.
Ex. Ice melts at 0 degrees C and freezes at 0 degrees C.

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a) $t=1.4\times 10^{-5}\ s$

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Explanation:

Given that

Velocity = 16 Km/s

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Charge on electron

$q=1.6\times 10^{-19}\ C$

So now by putting the values in equation 1

$a=\dfrac{E q}{m}$

$a=\dfrac{1.6\times 10^{-19}\times 0.027}{9.1\times 10^{-31}}\ m/s^2$

$a=4.74\times 10^{9}\ m/s^2$

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Here initial velocity u= 0 m/s

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Answer:

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Part (b) The specific discharge of the flow is 0.0363 m/day

Part (c) The average linear velocity of the flow is 0.242 m/day

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Explanation:

Part (a) the flow rate per unit width of the aquifer

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$q = -Kb\frac{dh}{dl}$

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V = 0.0363 m/day

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Va = 0.242 m/day

Part (d) the time taken for a tracer to travel the distance between the observation wells

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Time = distance / speed

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