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Two balloons of the same volume are filled wi t.h gases at the same pressure, one with hydrogen and the other with helium. Which of the two has the greater buoyancy (including the weight of the bag) and what is the ratio of buoyancies?

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Knowledge Check

  • Two vessels of the same volume contain the same gas at same temperature. If the pressure in the vessels is in the ratio of 1 : 2, then

    A
    the ratio of the average kinetic energy is 1 : 2
    B
    the ratio of the root mean square velocity is 1 : 1
    C
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    D
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  • Two wires of the same material have equal lengths but A is thicker than other B . Which of the two has greater value of Young's modulus?

    A
    `A`
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    C
    same for `A` and `B`
    D
    cant perdict

  • Two identical vessels contain helium and hydrogen gases at same temperature, then

    A
    average kinetic energy per mole of hydrogen = average kinetic energy per mole of helium
    B
    average translational kinetic energy per mole of hydrogen = average translational kinetic energy per mole of helium
    C
    average kinetic energy per mole of hydrogen `=(3)/(5)` average kinetic energy per mole of helium
    D
    average kinetic energy per mole of hydrogen `=(5)/(3)` average kinetic energy per mole of helium

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