Home
Class 11
PHYSICS
Explain why, the earth without its atm...

Explain why,
the earth without its atmosphere would be inhospitably cold.

Text Solution

Verified by Experts

Substance on Earth radiate infrared waves due to heating by Sun. These waves are reflected back to Earth from atmosphere. That.s why the atmosphere of Earth is warm at night.
If atmosphere is not there, then the infrared waves will be emitted out from Earth and Earth will become cool inconveniently.
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - B (Numericals) Numerical From Textual Exercise (Answer the following : )|4 Videos
  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - B Numerical From .DARPAN. Based On Textbook|7 Videos
  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - B|10 Videos
  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    KUMAR PRAKASHAN|Exercise SECTION-F (SECTION-D) QUESTIONS PAPER|1 Videos
  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Question Paper|11 Videos

Similar Questions

Explore conceptually related problems

Explain why : (a) a body with large reflectivity is a poor emitter (b) a brass tumbler feels much colder than a wooden tray on a chilly day (c) an optical pyrometer (for measuring high temperatures calibrated for an ideal black body radiation gives too low a value for the temperature of a red hot Iron plece in the open, but gives a correct value for the temperature when the same plece is in the fumace (d) the earth without its atmosphere would be inhospitably cold (e) heating systems based on circulation of steam are more efficient in warming a building than those based on circulation of hot water

If the earth had no atmosphere ...... .

Explain why the planets do not twinkle.

Explain why the planets do not twinkle.

An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance , however small .Why then does its speed increase progressively as it comes closer and closer the earth ?

Explain the magnetic fields of the Earth.

(i) A poor emitter has a large reflectivity . Explain why. (ii) A copper tumbler feels much colder than a wooden block on a cold day. Explain why. (iii) The earth would become so cold that life is not possible on it in the absence of the atmosphere. Explain why? (iv) Why clear nights are cooler than cloudy nights? Why does a piece of red glass when heated and taken out glow with green light? (vi) Why does the earth not become as hot as the sun although it has been receiving heat from the sun for ages? (vii) Animals curl into a ball when they are very cool. Why? (viii) Heat is generated continuously in an electric heater but its temperature becomes constant after some time. Explain why? (ix) A piece of paper wrapped tightly on a wooden rod is observed to get charred quickly when held over a flame as compared to a similar piece of paper when wrapped on a brass rod. Explain why? (x) Liquid in a metallic pot boils quickly whose base is made black and rough than in a pot whose base is highly polished . Why?

The weight of an object on the earth is 98 N, then its mass would be ………. kg

KUMAR PRAKASHAN-THERMAL PROPERTIES OF MATTER-Section - B (Numericals) Numerical From Textual Exercise
  1. A large steel wheel is to be fitted on to a shaft of the same material...

    Text Solution

    |

  2. A hole is drilled in a copper sheet. The diameter of the hole is 4.24 ...

    Text Solution

    |

  3. A steel wire 0.72 m long has a mass of 5.0 xx 10 ^(-3) kg. If the wire...

    Text Solution

    |

  4. A brass rod of length 50 cm and diameter 3.0 mm is joined to a steel r...

    Text Solution

    |

  5. The coefficient of volume expansion of glycerin is 49xx10^(-5)K^(-1). ...

    Text Solution

    |

  6. A 10 kW drilling machine is used to drill a bore in a small aluminium ...

    Text Solution

    |

  7. A copper block of mass 2.5 kg is heated in a furnace to a temperature ...

    Text Solution

    |

  8. In an experiment on the specific heat of a metal, a 0.20 kg block of t...

    Text Solution

    |

  9. Given below are observations on molar specific heats at room temperatu...

    Text Solution

    |

  10. Answer the following questions based on the P-T phase diagram of carbo...

    Text Solution

    |

  11. Answer the following questions based on the P - T phase diagram of CO(...

    Text Solution

    |

  12. A child running a temperature if 101^(@)F is given an antipyrine (i.e....

    Text Solution

    |

  13. A 'thermacole' icebox is cheap and efficient method for storing small ...

    Text Solution

    |

  14. A brass boiler has a base of 0.15m^(2) and thickness 1.0 cm. It boils ...

    Text Solution

    |

  15. Explain why, a body with large reflectivity is a poor emitter.

    Text Solution

    |

  16. Explain why, a brass tumbler feels much colder than a wooden tray on...

    Text Solution

    |

  17. Explain why, an optical pyrometer (for measuring high temperatures) ...

    Text Solution

    |

  18. Explain why, the earth without its atmosphere would be inhospitably ...

    Text Solution

    |

  19. Explain why, heating systems based on circulation of steam are more ...

    Text Solution

    |

  20. A body cools from 80^(@)C to 50^(@)C in 5 minutes Calculate the time i...

    Text Solution

    |