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9th Class Physics Chapter 9 Online Preparation
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Short Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "
Try The Short Questions For 9th Class Physics English Medium Chapter 9 Preparation
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Total Questions10
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Available Sets9
Physics (New Book) - 9th Class Physics English Medium Chapter 9 Preparation
Question # 1
Explain the impact of greenhouse effect in global
- Ans 1: During the recent years, the percentage of carbon dioxide has been increased considerably This has caused an increase in the average temperature of the Earth by trapping more heat due to greenhouse effect This phenomenon is known as global warming This has serious implications for global climate.
Prepare Complete Set Wise Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "
9th Class Physics English Medium Chapter 9 Preparation - Set 1
Question # 1
Explain the impact of greenhouse effect in global
- Ans 1: During the recent years, the percentage of carbon dioxide has been increased considerably This has caused an increase in the average temperature of the Earth by trapping more heat due to greenhouse effect This phenomenon is known as global warming This has serious implications for global climate.
9th Class Physics English Medium Chapter 9 Preparation - Set 2
Question # 1
How rooms are heated using gas heaters
- Ans 1: Rooms are heated using gas heaters by radiation
9th Class Physics English Medium Chapter 9 Preparation - Set 3
Question # 1
Describe relation of radiation of heat and surface area
- Ans 1: Transfer of heat by radiation is also affected by the surface area of the body emitting or absorbing heat larger is the area, greater will be the transfer of heat.
9th Class Physics English Medium Chapter 9 Preparation - Set 4
Question # 1
What measurements do you suggest to converse energy in houses
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Ans 1: Measurements to converse energyWe should switch off extra electric equipment's inorder to conserve energy in housesThe use to LED lights can also conserve electricity.
9th Class Physics English Medium Chapter 9 Preparation - Set 5
Question # 1
How rooms are heated using gas heaters
- Ans 1: Rooms are heated using gas heaters by radiation
9th Class Physics English Medium Chapter 9 Preparation - Set 6
Question # 1
Define sea breeze how it is cause
- Ans 1: On a hot day cold air from the sea begins to move toward the land this is called sea land breeze,
- Ans 2: Reason: On a day the temperature of land increase more quickly than the sea It is because the specific heat of land is much smaller as compared to water The air above land gets hot and rises up Cold air from sea begins to move towards land It is called sea breeze
9th Class Physics English Medium Chapter 9 Preparation - Set 7
Question # 1
What measurements do you suggest to converse energy in houses
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Ans 1: Measurements to converse energyWe should switch off extra electric equipment's inorder to conserve energy in housesThe use to LED lights can also conserve electricity.
9th Class Physics English Medium Chapter 9 Preparation - Set 8
Question # 1
Define thermal conductivity.
- Ans 1: substance maintained at a temperature difference of one kelvin is called the thermal conductivity of that substance. Unit: The SI unit of thermal conductivity is Wm-1 K-1
9th Class Physics English Medium Chapter 9 Preparation - Set 9
Question # 1
How does heat reaches us from the sun
- Ans 1: Our sun is the major source of heat energy It reaches us neither by conduction nor by convection because the space between the sun and the Earths atmosphere is travels from one place to another place It is through radiation that heat reaches us from the Sun.
