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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
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Exam Questions
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.
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
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?
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.
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.
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
What is the effect of increased pressure on the boiling point of water
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?