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प्रश्न
How does green house effect help in keeping the temperature of earth’s surface suitable for living of human beings?
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उत्तर
From sun, we receive 1366W m-2 energy at the top of our earth's atmosphere, out of which only 235Wm-2 energy reaches near the earth's surface. The earth and ocean surface absorbs 168 W m-2 energy and only 67 W m-2 energy remains in the lower atmosphere. With this much energy received on earth surface, its actual surface temperature would have been around -180C which is quite uncomfortable for human living. Fortunately the greenhouse gases present in the earth's atmosphere contribute in trapping the heat energy within the atmosphere and they produce an average warming effect of about 330C to keep the effective temperature around 150C. So, greenhouse effect helps in keeping the temperature of earth's surface suitable for living of human beings.
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संबंधित प्रश्न
What property of water makes it an effective coolant?
During the phase change does the average kinetic energy of the molecules of the substance increase?
Differentiate between heat capacity and specific heat capacity.
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as heat reservoir to keep juice bottles without freezing?
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
The cold object the hot object enclosed in one box of heat-resistant material.
- What changes will occur in the two objects when temperature flows from those objects?
- Which principle can show that the energy exchange takes place between two objects only when kept in isolated system?
The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js-1. Answer the questions that follow:
- Calculate specific heat capacity of water.
- Heat released in the region BC.
Conductors have generally high specific heat capacities and insulators have low specific heat capacities.
To study energy exchange between hot and cold objects, the system of both objects is isolated from the environment by keeping them inside ______.
