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Anna71 [15]
3 years ago
12

Which of the following best describes a property of water?

Physics
2 answers:
Snezhnost [94]3 years ago
5 0

Answer: C. Remaining liquid over a wide temperature range

Explanation: Water has a high specific heat i.e it requires a large amount of heat to raise the temperature of 1 gram of water through 1^0C. This is because the molecules of water are associated through strong hydrogen bonds.

It is also an universal solvent as it can dissolve most of the substances in it due to its high dielectric constant.

The freezing point of water is  0^0C, that is liquid water converts to solid form at 0^0C and the boiling point of water is  100^0C, that is liquid water converts to gaseous form at 100^0C. Thus it can remain in liquid form over the temperature range of  0^0C to 100^0C.

Water has a high surface tension as the molecules of water are held together by strong hydrogen bonds.

stiks02 [169]3 years ago
3 0

Correct answer is option C.

Remaining liquid over a wide temperature range  

Other options are invalid.

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Given that, .

Mass of ladder is 51kg

Then, it weight is

WL = mg = 51 × 9.81 = 500.31N

This weight will act at the midpoint of the ladder

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Using newton second law

Check attachment

Ng is normal force on the ground

Ff is the horizontal frictional force

Nw Is the normal force on the wall

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Also

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Then,

Ff = Nw

Now taking moment about point A.

Check attachment

using the principle of equilibrium

Sum of clockwise moment equals to sum of anti-clockwise moment

Also note that the Normal force on the wall is not perpendicular to the ladder, so we will resolve that and also the weights of ladder and weight of object

Clockwise = Anticlockwise

Wo•Cos60 × 4 + WL•Cos60 × 7.5 = Nw•Sin60 × 15

794.61Cos60 × 4 + 500.31Cos60 × 7.5 = Nw × Sin60 × 15

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Nw = 266.77 N

Since, Nw = Ff

Then, Ff = 266.77N

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