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9th Class Physics Chapter 8 Online Preparation
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Short Questions For Chapter 8 "9th Class Physics English Medium Chapter 8 Preparation "
Try The Short Questions For 9th Class Physics English Medium Chapter 8 Preparation
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Total Questions10
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Available Sets11
Physics (New Book) - 9th Class Physics English Medium Chapter 8 Preparation
Question # 1
What is Fahrenheit temperature scale?
- Ans 1: In fahrenheit scale the interval between lowere and upper fixed points is divided into 180 equal parts. i. Lower fixed point=32 oC ii. Upper fixed point = 212 oF
Prepare Complete Set Wise Questions For Chapter 8 "9th Class Physics English Medium Chapter 8 Preparation "
9th Class Physics English Medium Chapter 8 Preparation - Set 1
Question # 1
What is Fahrenheit temperature scale?
- Ans 1: In fahrenheit scale the interval between lowere and upper fixed points is divided into 180 equal parts. i. Lower fixed point=32 oC ii. Upper fixed point = 212 oF
9th Class Physics English Medium Chapter 8 Preparation - Set 2
Question # 1
Define Evaporation
- Ans 1: Evaporation is the changing of a liquid into vapors (gaseous start) from the surface of the loiquid without heating it
9th Class Physics English Medium Chapter 8 Preparation - Set 3
Question # 1
What is meant by thermal expansion?
- Ans 1: If change in temperature cause the change in length, or volume of a substance then it is called as thermal expansion of that substance.
9th Class Physics English Medium Chapter 8 Preparation - Set 4
Question # 1
Does water and spirit evaporate at the same rate
- Ans 1: Evaporation rate of different liquids are different Water and spirit evaporate at different temperature. Form example put a few drops of spirit on hand Drops of spirit will evaporate quickly and the same action will not happen with water The reason is this that the boiling point of spirit lesser than the boiling point of water That is why both spirit water do not evaporate at the same rate
9th Class Physics English Medium Chapter 8 Preparation - Set 5
Question # 1
How many intervals are in Fahrenheit scale
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Ans 1: In Fahrenheit scale the interval between lower and upper fixed points is divided into 100 equal partsLower fixed point =32, Upper fixed point = 212
9th Class Physics English Medium Chapter 8 Preparation - Set 6
Question # 1
Write the scales of temperature?
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Ans 1: Mercury in glass thermometers
are widely used in laboratories clinics and house to measure temperature in the range from -10°c to 150°c.
9th Class Physics English Medium Chapter 8 Preparation - Set 7
Question # 1
Why our clothes dry up more quickly in summer than in winter
- Ans 1: Clothes dry up more quickly in summer than in winter because in summers temperature is high which inreases the rate of evaporation.
9th Class Physics English Medium Chapter 8 Preparation - Set 8
Question # 1
What is Kelvin scale of temperature.
- Ans 1: In kelvin scale, the interval between lower and upper fixed points is divided into 100 equal parts. i. Lower fixed point = 273 oK ii. Upper fixed point = 373 oK
9th Class Physics English Medium Chapter 8 Preparation - Set 9
Question # 1
Write the use and range of clinical thermometer
- Ans 1: Clinical thermometer: A clinical thermometer is used to measure the temperature of human body It has a narrow range from
9th Class Physics English Medium Chapter 8 Preparation - Set 10
Question # 1
How does heating affect the motion of molecules of a gas
- Ans 1: When a gas is heated, the velocityh of the gas molecules increased due to this reason the motionn of molecules of molecules increased which increases the kinetic energy internal energy and temperature of a gas molecules.
9th Class Physics English Medium Chapter 8 Preparation - Set 11
Question # 1
What is meant by evaporation
- Ans 1: Evaporation is a changing of aa liquid into apours from surface of liquid without heating
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Ans 2: Factors The rate of evaporation is affected by various factors.Temperature'Surface AreaWindNature of the Liquid
- Ans 3: Evaporation causes cooling: During evaporation fast moving molecules escape out from the surface of the liquid Molecules that have lower kinetic energies are left behind This lowers the average kinetic energy of the liquid molecules and the temperature of the liquid So evaporation of perspiration helps to cool our bodies.
