Tag: air exerts pressure

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Questions Related to air exerts pressure

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts the concept of bernoulli's principle air exerts pressure

The atmospheric pressure decreases at the rate of ______________.

  1. 1 millibar/altitude of 10 meters

  2. 1 millibar/altitude of 15 meters

  3. 1 millibar/altitude of 18 meters

  4. 1 millibar/altitude of 20 meters
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Near Earth's surface the pressure decreases with height at a rate of about 1 millibars for every 10 metres. However, over cold air the decrease in pressure can be much steeper because its density is greater than warmer air.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts the concept of bernoulli's principle air exerts pressure

When the temperature increases atmospheric pressure _________.

  1. increases

  2. decreases

  3. remains same

  4. became zero
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There exists a negative relation between pressure and temperature. When temperature increases pressure will fall and vice versa. That is why, pressure increases from equatorial region towards the polar region.

Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

As one goes up from earth's surface, the temperature of air:

  1. increases

  2. decreases

  3. first increases and then decreases

  4. first decreases and then increases
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the atmosphere, temperature decreases with altitude in the troposphere, but then increases in the stratosphere due to ozone absorption of UV radiation.

Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

Fog can be defined as:

  1. Smoke from cigarette

  2. Polluted air from vehicles

  3. Clouds forming close to the ground

  4. A combination of smoke and dust particles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fog is a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility.

Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

Which of the following statements is true regarding the properties of air?

  1. It is a good conductor of electricity

  2. It is a good conductor of heat

  3. It is translucent in nature

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Air is a good conductor of heat.

It is a good conductor of electricity.
It is translucent in nature.
Hence, option $(D)$ is the answer.

Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

Which of the following can show the direction of wind ?

  1. Anemometer

  2. Wind wane

  3. Wind mill

  4. Barometer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anemometer: Used to measure the speed of the wind.


Wind wane: Used to show the direction of wind.


Windmill: Converts wind energy to rotational energy.

Barometer: Used to measure atmospheric pressure. 


Hence, option B is correct.

Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

Which of the following is not true about air?

  1. air can be separated into components

  2. it can be liquefied
  3. liquid nitrogen has a b.p of $-196^\circ C$

  4. air has a chemical formula
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The statement which is not true about air is that it has a chemical formula. Air has no chemical formula. It is a mixture of gases.