Physics GK · all questions

Mechanical Physics
practice.

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Q161

Calculate the pressure (in Pa) if a thrust of 1000 N is applied to an area of 5 m².

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Q162

200 gm of water is filled in a weightless balloon. Its weight in water will be

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Q163

A deep sea diver may hurt his ear drum during diving because of

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Q164

If the amount of water vapour in the air is high, what will be the rate of evaporation-

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Q165

Four wires of same material and dimensions as mentioned below are stretched by a load of same magnitude separately. Which one of them will be elongated maximum?

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Q166

Fish can survive in a frozen lake because

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Q167

An application of Bernoulli's equation for fluid flow is found in

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Q168

Which of the following is not based on the principle of Archimedes?

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Q169

What is another name for the buoyancy force exerted by water to a submerged body?

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Q170

If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?

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Q171

Which of the following statements is not true regarding the effect of increasing temperature on the distribution of molecular motion in a gas-

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Q172

Consider the following statements.
The rise of a liquid in a capillary tube depends on
1. The surface tension of liquid
2. The length
3. The outer radius
4. The inner radius of the tube
Which of the following statements is/are true?

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Q173

While travelling by plane, the ink of the pen starts to come out

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Q174

Assertion (A) Pascal law is the working principle of a hydraulic lift.
Reason (R) Pressure is equal to thrust per unit area.

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Q175

When pressure is applied to a fluid, the pressure change is transmitted to every part of the fluid without any loss. Which of the following laws explains this phenomenon?

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Q176

The SI unit of elastic potential energy is

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Q177

The breaking stress of wire depends on

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Q178

Any body kept in a fluid experiences an upward force called . . . . . . . .

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Q179

Assertion (A) The concept of surface tension is held only for liquid.
Reason (R) Surface tension does not hold for gases.

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Q180

The pressure of a fluid varies with depth h as p = p₀ + pgh, where p is the fluid density. This expression is associated with

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