Physics

    Physics
    1 WH =
    1 WH (Watt hour) = 3600 joules
    Author: rikazzz Comment
    Geometrical Optics
    The astronomical telescope, as is used to see distant
    Author: rikazzz Comment
    Everyday Science
    The speed of sound in the liquid is
    Author: rikazzz Comment
    Physics
    A fountain pen works on the principle of
    A fountain pen is a nib pen that, unlike its predecessor, the dip pen, contains an internal reservoir of liquid ink. The pen draws ink from the reservoir through a feed to the nib and deposits it on paper via a combination of gravity and capillary action.
    Author: rikazzz Comment
    Matter Properties
    They have no fixed shape or volume
    Author: rikazzz Comment
    Thermal Properties of Matter
    A brass rod is 1m long at 0 °C, if the coefficient of expansion is 1.9 * 10-5 K-1 then length at 30 °C is
    Author: rikazzz Comment
    Geometrical Optics
    The focus lies behind the mirror in
    Author: rikazzz Comment
    Sound
    The total distance covered by a sound wave from the generation point to reflecting surface and back should be
    Author: rikazzz Comment
    Work and Energy
    Solar energy can also be converted directly into electricity by
    Author: rikazzz Comment
    Physics
    When a ring of metal is heated what happens to its hole ?
    The hole size will increase because in expansion the size between two molecules do not increase so when the molecules on the outer edge move outward. Due to expansion, the size of the hole will also increase so as to compensate the distance change between the molecules.
    Author: rikazzz Comment