EASY
Earn 100

The pressure exerted by the air is known as?

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Important Questions on Force and Pressure

MEDIUM
A block of mass 3 kg and density ρ, suspended from a spring balance is immersed in a liquid of density ρ3.  Then the balance would read weight as: 
MEDIUM
Give reason for the following :
A balloon collapses when air is removed from it.
MEDIUM
Which is higher–the atmospheric pressure at Mumbai or the atmospheric pressure on top of Mt Everest? Give reasons.
 
MEDIUM
Name the factors on which atmospheric pressure depends. Explain how does atmospheric pressure changes when we go to the mountains. 
EASY
In which direction does air exert maximum pressure?
HARD

Solve the ladder word puzzle with the help of clues given alongside.

                    A                      
                    1T       D             M
                    M                      
            2T     H O                      
                    S                      
        3W       R   P O                    
                    H                      
                    E                      
4E     A         A   R   G                  
                    I                      
          5H     R   C     E                
                    6P                      
                7T   R   A                  
                    E                      
                    S                      
        8S       T   S     E                
                    U                      
                    R                      
                    E                      

Clues

1. Heavily falling water along with rising warm air producing heavy rain, lightning, sound and strong wind. 12
2. Cyclones originating from China sea. 7
3. Tornado formed over the sea. 11
4. Place on the earth which receives more sunlight. 16
5. Tropical cyclones in the Gulf of Mexico, the Caribbean Sea and Western Pacific Ocean. 10
6. From where colder air moves down. 11
7. Storms that form very suddenly on the land. 7
8. The atmospheric layer where the ozone layer exists. 12

EASY
Explain why a rubber sucker pressed on a smooth surface gets stuck to the surface.
 
EASY
How does the atmospheric pressure change with altitude?
MEDIUM
Why do bicycle tubes burst when over-filled?
EASY
The envelope of air is known as the________.
MEDIUM

List five uses of air pressure.  

EASY
The Earth is surrounded by a thick layer of air called the _____.
EASY
Atmospheric pressure increases with: 
EASY
The instrument used to measure change in air pressure is        
EASY
Give reason for the following :
Two holes are made in a sealed oil tin to take out oil from it.
MEDIUM

We are able to drink liquids using a straw. Explain why.

MEDIUM
Give reasons: 
The wind blows because of air pressure.
EASY
Cotyledons are also called-
EASY
We do not feel uneasy even under the enormous atmospheric pressure. Give a reason.
EASY

What is atmospheric pressure?