Tag: air, winds and cyclones

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Questions Related to air, winds and cyclones

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

During night time cool breeze blows from_to __

  1. land, sea

  2. sea,land

  3. mountain,land

  4. land,mountain
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
During night time cool breeze blows from land to sea.
As we know, water is good absorber of heat, it takes more time to heat up and cool down water than that of land. And during night, land cools down quickly than that of water causing high pressure over land and hot air above water causes low pressure over water. As we know wind blow from higher pressure to lower pressure, so during night cool breeze blows from land to sea.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle
State True or False :
Convection currents are set up giving rise to sea breezes. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is true; convection current are set up giving rise to sea breezes.

Convectional currents are the result of differential heating. Less dense(lighter) warm materials rise while heavier(more dense) cool materials sink. It is the movement that creates circulation pattern known as convectional current in atmosphere, water and mantle of earth.

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

State whether given statement is True or False
During the night, land cools faster than sea.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is true that during night; land cools faster than sea.

As we know; water is good absorber of heat, it takes more time to heat up and cool down too. So during night; land cools faster than water.

Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

Which of the following is an example of mode of transport making use of air pressure ?

  1. Sailing boat in an ocean

  2. Rowing boat on a windy day

  3. Aeroplane in a sky

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A moving boat's sail is shaped as an airfoil like the wing of a plane. When air moves over a plane's wing, from front to back, wind flowing over the top of the wing has to travel farther than wind flowing under the wing's bottom surface. This creates a pressure difference that lifts the plane.
Hence all the above is the answer.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

Which of the following is not an example of air exerting pressure ?

  1. Pressing the brakes of a bicycle.

  2. Filling up the bicycle tube with air

  3. Riding bicycle against the flow of wind

  4. Playing with the kite
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Brakes on a bicycle work using friction (the rubbing force between two things that slide past one another while they're touching). Hence brakes doesn't work on the principle of air exerting pressure.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

Which source of energy makes use of the air pressure in generation of energy ?

  1. Hydroelectric Power plant

  2. Nuclear reactor

  3. Windmill

  4. Thermal power plant
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Windmill makes use of the air pressure in the generation of energy, as hydroelectric power plants capture the energy of falling water to generate electricity.
A nuclear reactor produces electricity by chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity. 
In a thermal power plant fuel is burned to produce heat, this heat is used to change water into steam. this drives the generator to produce electricity.
Whereas in windmill the energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity.