Tag: pressure

Questions Related to pressure

When a plane moves along the runway, the air above the wing speeds up more, So the pressure

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. Lowers

  2. Increases

  3. Raises

  4. No Pressure

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Correct Option: A
Explanation:
According to Bernoulli's theorem        $ P + \rho gh+ \dfrac{1}{2}\rho v^2= constant$
$\implies$  When $v$ is increases, then pressure $(P)$ is lowers.

An instrument commonly used for measurement of atmospheric pressure is known as

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. Manometer

  2. Barometer

  3. Calorimeter

  4. Potentiometer

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Correct Option: B
Explanation:

Barometer is a scientific instrument which is used to caliberate pressure at different surroundings & pressure.

Which of the following are the examples of atmospheric pressure?

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. Fountain bottle

  2. Ping pong funnel

  3. Million dollar bet

  4. All of the above

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Correct Option: D
Explanation:

Fountain bottle, ping pong funnel as well as million doller bet are examples of atmospheric pressure.

 1 mm Hg is equal to

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. 1 atm

  2. 1.013 $\times$10$^5$ Pa

  3. 133.29 atm

  4. 1.316 $\times$10$^{-3}$ atm

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Correct Option: D
Explanation:

760 mm Hg  $  =1$ atm

$\therefore$  1 mm Hg $ = \dfrac{1}{760}  =1.316\times 10^{-3}$ atm


when an air particle speeds up, it actually pushes            . Complete the sentence

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. Less

  2. More

  3. Inside

  4. Outside

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Correct Option: A
Explanation:

According to Bernoulli's theorem        $ P + \rho gh+ \dfrac{1}{2}\rho v^2= constant$
$\implies$  When $v$ is more, then pressure $(P)$ is less.
Thus when an air particle speeds up, it actually pushes less.

wherever the air pressure is higher, there will be a stronger force or push against an object. Is the statement True or False

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. True

  2. False

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Correct Option: B
Explanation:

Pressure      $P = \dfrac{F}{A}$                $\implies P \propto F$

Thus greater the pressure, stronger will be the force.

The ordinary pressure of air surrounding us is

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. 15 pounds

  2. 16 pounds

  3. 14.2 pounds

  4. 14.7 pounds

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Correct Option: D
Explanation:

$Answer:-$ D

The ordinary pressure of the air surrounding us is 14.7 pounds per square inch, but the pressure can change when the wind blows or an object, like a car or airplane, accelerates.

One important principle to remember is that wherever the air pressure is higher, there will be a stronger force or push against an object. It’s also helpful to know that when an air particle speeds up, it actually “pushes” less. Imagine that fast-moving air particles are in so much of a hurry that they don’t have time to apply force. This principle is used in airplane wings to make planes fly. When a plane moves along the runway, the air above the wing speeds up more, lowering the pressure, so that the air below the wing can push the plane upward.

Specify heat of mercury is

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. $0.03 cal/gm/^oC$

  2. $0.3 cal/gm/^oC$

  3. $0.0003 cal/gm/^oC$

  4. $0.003 cal/gm/^oC$

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Correct Option: A
Explanation:

Specific heat of mercury is $0.03 \ cal/ gm/^{o} C$.

Hence, option A is correct.

A boy blows a balloon of volume $1$ litre to pressure of $10$ atmospheres in $10$ sec, the power is

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. $10.13w$

  2. $1.013w$

  3. $20.26w$

  4. $0.506w$

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Correct Option: B

Ice of water at $ 100^o $ is given 540 cal of beat and the steam formed occupation 1671 cc at the atmosphere pressure. Then workdone against atmosphere pressure in this procces is nearly

physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

  1. 540 cal

  2. 500 cal

  3. 40 cal

  4. 100 cal

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Correct Option: A