Home
Class 8
PHYSICS
We can enjoy a cold-drink or fruit juice...

We can enjoy a cold-drink or fruit juice with the help of a straw but can we imagine drinking a cold-drinking or fruit juice on the moon using a straw ?

Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY AND MAGNETISM

    NAVNEET PUBLICATION|Exercise QUESTION BANK|59 Videos

Similar Questions

Explore conceptually related problems

To preserve fruit juices and wines, we use____.

Read the ingredients and their proportion printed on bottles of cold drinks and juices and wrappers of ice creams. the natural and artificial ingredients added in them, Which precautions should be taken about their consumption ?

Read the following paragraph and answer the questions: If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing gue to loss of energy. The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses haet energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistance box (meaning that the energy exchange takes place between the two objects only ), then no energy can flow from inside the box or come into the box. Which principle do we learn about from this process?

Use your brain power. Food materials like cold drinks, ice creams, cakes, juces are available in various colours and flavous. Whether these colours and flavoures are really derived from fruits ?

State whether the following statements are true or false. Correct the false statements:, Use of 'use and throw' type of articles like pens, canned cold drinks, tetra packs should be encouraged in waste management.

Read the paragraph and answer the questions given below: Renewable energy is energy produced from sources that do not deplete or can be replensied within a human's life time. The most common examples include wind, solar, geothermal, biomass, and hydroelectric power. This is in contrast to non-renewable energy is derived directly or indirectly from the sun. Sunlight can be captured directly using solar technologies. The sun's heat drives winds, whose energy is captured with turbines. Plants also rely on the sun to grow and their stored energy can be utilized for bioenergy. Not all renewable energy sources rely on the sun. For examples, geothermal energy utilizes the Earth's internal heat, tidal energy relies on the gravitational pull of the moon, and hydroelectric power relies on the flow of water. Which type of energy do we mostly use in India?

Read the paragraph and answer the questions given below : Our atmosphere is getting hotter. more turbulent, and more unpredictable because of the “boiling and churning” effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and “boiled”. The green house gases such as water vapour, carbon dioxide, methane, nitrous oxide, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natural disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exterminate us. What can we do to reverse effects climate change?

Read the paragraph and answer the questions given below : Our atmosphere is getting hotter. more turbulent, and more unpredictable because of the “boiling and churning” effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and “boiled”. The green house gases such as water vapour, carbon dioxide, methane, nitrous oxide, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natural disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exterminate us. Why is there increased global warming?

Read the paragraph and answer the questions given below : Our atmosphere is getting hotter. more turbulent, and more unpredictable because of the “boiling and churning” effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and “boiled”. The green house gases such as water vapour, carbon dioxide, methane, nitrous oxide, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natural disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exterminate us. Which are main green house gases?

NAVNEET PUBLICATION-FORCE AND PRESSURE-QUESTION BANK
  1. Why some people feel their ears popping at the top of a mountain.

    Text Solution

    |

  2. Why some people feel breathless as they climb higher and higher on a m...

    Text Solution

    |

  3. We can enjoy a cold-drink or fruit juice with the help of a straw but ...

    Text Solution

    |

  4. People are often advised not to carry fountain pens while travelling b...

    Text Solution

    |

  5. Why do some people have earache when they travel by an aeroplane ?

    Text Solution

    |

  6. Explain why a person may bleed from the nose when at a great height ab...

    Text Solution

    |

  7. How much pressure do we carry on our heads ? Why don't we feel it ?

    Text Solution

    |

  8. When a rubber sucker is pressed onto a flat glass surface, it sticks t...

    Text Solution

    |

  9. Describe a simple experiment to demonstrate atmospheric pressure.

    Text Solution

    |

  10. Explain the working of an ink dropper.

    Text Solution

    |

  11. Why is the opening of a dropper very narrow ?

    Text Solution

    |

  12. What is the characteristics of the cap of eye drop bottles ?

    Text Solution

    |

  13. Explain the working of a syringe used by children when they play with ...

    Text Solution

    |

  14. How does the doctor's syringe work ?

    Text Solution

    |

  15. Explain the origin of pressure due to a gas enclosed in a container.

    Text Solution

    |

  16. Define buoyant force.

    Text Solution

    |

  17. State the factors on which the buoyant force depends.

    Text Solution

    |

  18. A lemon sinks in a glass filled with water but it floats when we stir ...

    Text Solution

    |

  19. State Archimedes' principle.

    Text Solution

    |

  20. Write proper word in the blank space : According to Archimedes' prin...

    Text Solution

    |