Home
Class 10
BIOLOGY
The total …………………… of the universe remai...

The total …………………… of the universe remains constant because it can neither be created nor destroyed.

Text Solution

Verified by Experts

The correct Answer is:
energy
Promotional Banner

Topper's Solved these Questions

  • SOURCES OF ENERGY

    KUMAR PRAKASHAN|Exercise OBJECTIVE QUESTIONS AND ANSWERS (State whether the following sentences are true or false : )|1 Videos

  • SOURCES OF ENERGY

    KUMAR PRAKASHAN|Exercise OBJECTIVE QUESTIONS AND ANSWERS (Select the correct alternative from those given below each questions : )|1 Videos

  • SOURCES OF ENERGY

    KUMAR PRAKASHAN|Exercise OBJECTIVE QUESTIONS AND ANSWERS (Fill in the blanks : )|1 Videos

  • QUESTION PAPER-2 (MARCH,2020 - BOARD'S QUESTIONS PAPER)

    KUMAR PRAKASHAN|Exercise Section - C (Answer the following questions)|1 Videos

  • SUSTAINABLE MANAGEMENT OF NATURAL RESOURECES

    KUMAR PRAKASHAN|Exercise PRACTICAL SKILL BASED QUESTIONS WITH ANSWER|4 Videos

Similar Questions

Explore conceptually related problems

If light passes near a massive object, the gravitational interation causes a bending of the ray. This can be thought of as heappening due to a change in the effective refrative index of the medium given by n(r) =1 +2 GM//rc^2 where r is the distance of the point of consideration from the centre of the mass of the massive body, G is the universal gravitational constant, M the mass of the body and c the speed of light in vacuum. Considering a spherical object find the deviation of the ray form the original path as it graxes the object.

Can a system be heated and its temperature remains constant ?

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. The unit of entropy in S-I system is -

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. When milk is heated , its entropy :

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. After a long-long time, the energy available for work done will be :

Two stars bound together by gravity orbit othe because of their mutual attraction. Such a pair of stars is referred to as a binary star system. One type of binary system is that of a black hole and a companion star. The black hole is a star that has cullapsed on itself and is so missive that not even light rays can escape its gravitational pull therefore when describing the relative motion of a black hole and companion star, the motion of the black hole can be assumed negligible compared to that of the companion. The orbit of the companion star is either elliptical with the black hole at one of the foci or circular with the black hole at the centre. The gravitational potential energy is given by U=-GmM//r where G is the universal gravitational constant, m is the mass of the companion star, M is the mass of the black hole, and r is the distance between the centre of the companion star and the centre of the black hole. Since the gravitational force is conservative. The companion star and the centre of the black hole, since the gravitational force is conservative the companion star's total mechanical energy is a constant. Because of the periodic nature of of orbit there is a simple relation between the average kinetic energy ltKgt of the companion star Two special points along the orbit are single out by astronomers. Parigee isthe point at which the companion star is closest to the black hole, and apogee is the point at which is the farthest from the black hole. Q. For circular orbits the potential energy of the companion star is constant throughout the orbit. if the radius of the orbit doubles, what is the new value of the velocity of the companion star?

Two stars bound together by gravity orbit othe because of their mutual attraction. Such a pair of stars is referred to as a binary star system. One type of binary system is that of a black hole and a companion star. The black hole is a star that has cullapsed on itself and is so missive that not even light rays can escape its gravitational pull therefore when describing the relative motion of a black hole and companion star, the motion of the black hole can be assumed negligible compared to that of the companion. The orbit of the companion star is either elliptical with the black hole at one of the foci or circular with the black hole at the centre. The gravitational potential energy is given by U=-GmM//r where G is the universal gravitational constant, m is the mass of the companion star, M is the mass of the black hole, and r is the distance between the centre of the companion star and the centre of the black hole. Since the gravitational force is conservative. The companion star and the centre of the black hole, since the gravitational force is conservative the companion star's total mechanical energy is a constant. Because of the periodic nature of of orbit there is a simple relation between the average kinetic energy ltKgt of the companion star Two special points along the orbit are single out by astronomers. Parigee isthe point at which the companion star is closest to the black hole, and apogee is the point at which is the farthest from the black hole. Q. Which of the following prevents the companion star from leaving its orbit and falling the black hole?

KUMAR PRAKASHAN-SOURCES OF ENERGY-OBJECTIVE QUESTIONS AND ANSWERS
  1. The hydrogen bomb is based on …………………… reaction.

    Text Solution

    |

  2. India is ranked …………………… in harnessing wind energy for the production ...

    Text Solution

    |

  3. The total …………………… of the universe remains constant because it can nei...

    Text Solution

    |

  4. The potential energy of flowing water gets transformed into kinetic en...

    Text Solution

    |

  5. In solar cookers, a plain mirror is used to converge the sunlight.

    Text Solution

    |

  6. Fossil fuels are the major fuels used for generating electricity.

    Text Solution

    |

  7. Submerged vegetation rots under anaerobic condition producing large am...

    Text Solution

    |

  8. Biogas is derived totally from animal biomass.

    Text Solution

    |

  9. The level of water in the sea rises and falls due to the gravitational...

    Text Solution

    |

  10. Nuclear energy is the best alternative of fossil fuel because of its e...

    Text Solution

    |

  11. The nuclear bomb is embedded in a deuterium and lithium containing sub...

    Text Solution

    |

  12. The assembly of the solar cell may be pollution free but the actual op...

    Text Solution

    |

  13. The energy sources that can be regenerated are called renewable energy...

    Text Solution

    |

  14. Nuclear fusion reactions are the source of energy in the sun and other...

    Text Solution

    |

  15. Graph/diagram based question : Which of the following graph is correct...

    Text Solution

    |

  16. Match the following :

    Text Solution

    |

  17. Match the following :

    Text Solution

    |

  18. Match the following :

    Text Solution

    |

  19. Which fuel is used in thermal power plant ?

    Text Solution

    |

  20. Which of the following is the adverse effect caused by burning of foss...

    Text Solution

    |