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प्रश्न
What is meant by global warming?
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उत्तर
Global warming means the increase in the average effective temperature of Earth’s surface due to an increase in the amount of greenhouse gases in its atmosphere.
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संबंधित प्रश्न
State three ways to minimize the global warming.
A substance is heated at a constant rate from a low temperature to a high temperature. A graph of temperature against time is shown in the figure. Which part or parts of the graph correspond(s) to the substance existing in two states?
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.
Explain why the specific heat capacity at constant pressure is greater than the specific heat capacity at constant volume.
A diatomic gas undergoes adiabatic change. Its pressure 'P' and temperature 'T' are related as p ∝ Tx, where x is ______.
An office room contains about 4000 moles of air. The change in the internal energy of this much air when it is cooled from 34° C to 19° C at a constant pressure of 1.0 atm is (Use `gamma_"air"` = 1.4 and Universal gas constant = 8.314 J / mol K) ____________.
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
Which of the following substances (A, B and C) has the highest specific heat?
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The SI unit of specific heat capacity | (a) Jkg−1°C−1 |
| (b) kg/m3 | |
| (c) calorie |
