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प्रश्न
State three ways to minimize the global warming.
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उत्तर
The three ways to minimize global warming are:
(i) Reduction in the use of fossil fuels and adoption of technology based on renewable sources of energy.
(ii) Reduction in deforestation and increase in afforestation.
(iii) Fostering international co-operation to reduce greenhouse gas emission.
संबंधित प्रश्न
Water in lakes and ponds do not freeze at once in cold countries. Give a reason is support of your answer.
How does green house effect help in keeping the temperature of earth’s surface suitable for living of human beings?
Give one example where high specific heat capacity of water is used as cooling.
Write two advantages of high specific heat capacity of water.
A certain amount of heat Q will warm 1 g of material X by 3°C and 1 g of material Y by 4°C. Which material has a higher specific heat capacity?
The temperature of a lead piece of mass 400 g rises from 20°C to 50°C when 1560 J of heat is supplied to it. Calculate: Heat capacity of lead piece.
The molar specific heat of a gas at constant volume is 12307.69 J kg-1 K-1. If the ratio of the two specific heats is 1.65, calculate the difference between the two molar specific heats of gas.
Write a short note.
Specific heat capacity
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The SI unit of specific heat capacity | (a) Jkg−1°C−1 |
| (b) kg/m3 | |
| (c) calorie |
A geyser heats water flowing at a rate of 2.0 kg per minute from 30°C to 70°C. If the geyser operates on a gas burner, the rate of combustion of fuel will be ______ g min-1.
[Heat of combustion = 8 × 103 Jg-1 Specific heat of water = 4.2 Jg-1°C-1]
