Tag: the concept of bernoulli's principle

Questions Related to the concept of bernoulli's principle

What is the direction of Monsoon winds in Summer ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. From ocean towards the land

  2. From land towards the ocean

  3. From equator towards the poles

  4. From poles towards the equator

Show answer
Correct Option: A
Explanation:
The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. These are monsoon winds.

Why do the polar winds not move in exact North-South direction ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The revolution of the earth affects the direction of the winds.

  2. The rotation of the earth affects the direction of the winds.

  3. The Other air currents in the atmosphere change the direction of the polar winds.

  4. None of these

Show answer
Correct Option: B
Explanation:
 A change in direction of wind is however, caused by the rotation of the earth.

What is the direction of Monsoon winds in winter ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. From oceans to land

  2. From land to oceans

  3. From equator to poles

  4. From poles to equator

Show answer
Correct Option: B
Explanation:
In winter, the direction of the wind flow gets reversed; it flows from the land to the ocean.

Which of the following is not true about the formation of winds due to uneven heating of land at Equator and Polar regions ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The winds blow from the $0-30^o$ latitudes, taking place of the warm air at the equator that has risen up, towards the equator and constitute the Polar winds.

  2. The cool air at the poles rushes in to take place of the warmer winds in the $60^o$ belt and constitute the Polar winds.

  3. The winds of the wind is not exactly in the North-South direction because of the rotation of the Earth.

  4. The pressure difference between the equatorial and polar regions leads to the formation of winds in the North-South direction

Show answer
Correct Option: D
Explanation:
Formation of winds at the equator and polar region involves following few steps:
1. The warm air rises, and the cooler air from the regions in the 0–30 degrees latitude belt on either side of the equator moves in.
2.  At the poles, the air is colder than that at latitudes about 60 degrees. 
3.  The warm air at these latitudes rises up and the cold wind from the polar regions rushes in, to take its place
4.  A change in direction is, however, caused by the rotation of the earth.

What is the importance of Monsoon winds ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. They lower the temperature of areas where temperature is usually high.

  2. They bring rain and play important role in water cycle.

  3. They clear up the sky and make atmosphere sunny.

  4. None of the above

Show answer
Correct Option: B
Explanation:

The correct answer is option(B).

The winds from the oceans carry water and bring rain. It is a part of the water cycle. The monsoon winds carry water and it rain.

Which area on the Earth receives maximum sunlight ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. Polar region

  2. Equatorial region

  3. Along the latitude of Tropic of Cancer

  4. Along the latitude of Tropic of Capricorn

Show answer
Correct Option: B
Explanation:
The Earth's shape is spherical. This causes the Sun's rays to strike the Earth's surface at different angles, creating variances in temperatures on Earth. The equator receives the most direct sunlight because sunlight arrives at a perpendicular (90 degrees) angle to the Earth.

What is the basis for the formation of winds due to heating of different areas on Earth ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The air in cold temperature regions gets cooled, expands and becomes more dense and rises up. It's place is taken by heavier air from adjacent regions.

  2. The air in cold temperature regions gets cooled up, expands and becomes less dense and rises up. It's place is taken by heavier air from adjacent regions.

  3. The air in high temperature regions gets heated up, expands and becomes less dense and rises up. It's place is taken by heavier air from adjacent regions.

  4. The air in high temperature regions gets heated up, contracts and becomes more dense and rises up. It's place is taken by heavier air from adjacent regions.

Show answer
Correct Option: C
Explanation:
In summer, near the equator the land warms up faster and most of the time the temperature of the land is higher than that of water in the oceans. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. And we know air expands on heating and and becomes less dense and therefore rises up.

At poles, how is the direction of Polar winds ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. Air from Polar region moves in towards the $60^o$ latitude belt

  2. Air from the $60^o$ latitude belt moves in towards Polar region

  3. Air from Polar region moves in towards the equatorial region

  4. Air from equatorial region moves in towards the Polar region

Show answer
Correct Option: A
Explanation:
At the poles, the air is colder than that at latitudes about 60 degrees. The warm air at these latitudes rises up and the cold wind from the polar regions rushes in, to take its place.

Arrange the following steps in the proper order to explain how a sea breeze occurs, near coastal regions.
(a) The temperature of land rises rapidly as compared to sea, because the specific heat capacity of land is five times less than that of water.
(b) Due to the low pressure over the land mass, the cool air over the sea starts blowing towards the land.
(c) The sun shines equally on the land mass and sea, giving equal amount of heat energy to both.
(d) The air above the land becomes hot and light, rises up and hence creates the low pressure over the land.

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. a d c b

  2. c d a b

  3. c a b d

  4. c a d b

Show answer
Correct Option: D
Explanation:

Near the coastal regions, when (c) the sun shines equally on the land mass as well as the sea giving an equal amount of heat energy.But (a) the temperature of land rises rapidly as compared to the sea water, as specific heat capacity of water is five times greater than that of land. So, water requires more heat energy to raises its temperature by $1^{\circ}C$. Then (d) the air above the land mass becomes hotter and lighter and hence rises up, which creates a low pressure over the land. (b) Due to the low pressure over the land mass, the cool air over the sea starts blowing towards the land, by this producing sea breeze.

If an ideal flask containing hot coffee is shaken, the temperature on the coffee will:

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. decrease

  2. increase

  3. remain same

  4. decrease if temperature is below $4$C and increase if temperature is equal to or more than $4$C

Show answer
Correct Option: C