Pressure - General Physics - Solved Exam, Exams of Physics

This is the Solved Exam of General Physics which includes Vector Quantities, Scalar Quantities, Resultant of Two Vectors, Circumference of Circle, Newton’s Second Law of Motion, Magnitude and Direction etc. Key important points are: Pressure, Formula for Pressure, Atmospheric Pressure, Units of Pressure, Weather Conditions, Contraction of Gas, Model of Human Breathing System, Force Per Unit Area, Pressure and Boiling Point

Typology: Exams

2012/2013

Uploaded on 02/19/2013

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Exam Questions
1. [2006 OL] [2009 OL][2010 OL][2012 OL]
Give the formula for pressure.
2. [2012] Define pressure.
3. [2006 OL][2010 OL][2012 OL]
Name an instrument used to measure atmospheric pressure.
4. [2009 OL]
If a metal block applies a force of 20 N on an area of 5 cm2, find the pressure being applied
by the block.
5. [2010 OL]
If the area of the face of a metal block is 30 cm2 and the force (weight) of the block is 90
N, find the pressure being applied by the block.
6. [2010]
The diagram shows a tank full of water. The mass of the water in the tank is 48 000 kg.
Calculate the approximate pressure that it exerts on the base of the tank.
Give the units of pressure with your answer.
7. [2009 OL] [2012]
Three holes were made in a carton of milk at the same time.
(i) From which hole will the milk pour out at the greatest rate?
(ii) Give a reason for your answer.
8. [2010 OL]
A household water supply has a water tank in the attic.
The water pressure at the upstairs tap is lower than at the downstairs tap.
Give a reason why this is the case.
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Exam Questions

  1. [2006 OL] [2009 OL][2010 OL][2012 OL] Give the formula for pressure.
  2. [2012] Define pressure.
  3. [2006 OL][2010 OL][2012 OL] Name an instrument used to measure atmospheric pressure.
  4. [2009 OL] If a metal block applies a force of 20 N on an area of 5 cm^2 , find the pressure being applied by the block.
  5. [2010 OL] If the area of the face of a metal block is 30 cm^2 and the force (weight) of the block is 90 N, find the pressure being applied by the block.
  6. [2010] The diagram shows a tank full of water. The mass of the water in the tank is 48 000 kg. Calculate the approximate pressure that it exerts on the base of the tank. Give the units of pressure with your answer.

7. [2009 OL] [2012]

Three holes were made in a carton of milk at the same time. (i) From which hole will the milk pour out at the greatest rate? (ii) Give a reason for your answer.

8. [2010 OL]

A household water supply has a water tank in the attic. The water pressure at the upstairs tap is lower than at the downstairs tap. Give a reason why this is the case.

Atmospheric Pressure

  1. [2011] The Earth’s atmosphere seen from space is the thin curve at the top of the photo. (i) Name the force that holds the atmosphere to the Earth.

This force gives the atmosphere weight and causes atmospheric pressure. (ii) Define pressure and give the unit for pressure. (iii)Why does atmospheric pressure decrease with height?

10. [2007]

The diagram is an Atlantic weather chart. (i) Use the chart to predict two weather conditions that you might expect for Ireland. (ii) Explain why low atmospheric pressure causes one of the weather conditions that you have given.

11. [2010]

The apparatus shown in the diagram was used to investigate the expansion and contraction of a gas. (i) What is observed when the flask is heated? (ii) Explain your observation when the flask is heated? (iii)What is observed when the flask is allowed to cool? (iv) Explain what you observe as the flask cools.

12. [2009]

The diagram shows a model of the human breathing system. (i) Name the part of the breathing system represented by the balloons. (ii) What is the part of the breathing system represented by the bell-jar?

Pressure and boiling point

  1. What is the effect of increased pressure on the boiling point of water

  2. How would you demonstrate that pressure affects boiling point?

(i) Why does increased pressure affect the boiling point of water? (ii) Can you think of an application of this (a device which is built on this principle)? (iii)Can you think of anyone where this might be a problem?