Physics

    Physics
    Which of these branches of Physics deal with heat and temperature and their relation to energy and work?
    Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy. In particular, it describes how thermal energy is converted to and from other forms of energy and how it affects matter.
    Author: rikazzz Comment
    Everyday Science
    Which of the following has the lowest frequency in an electromagnetic spectrum?
    Author: rikazzz Comment
    Physics
    Which one of the following is responsible for the working of Newton’s colour disc experiment ?
    A Newton Disc can be created by painting a disc with the seven different colours. A combination of red, green and blue in the circular disc will yield the same result. This is due to the phenomenon called persistence of vision.
    Author: rikazzz Comment
    Everyday Science
    The near point of a hypermetropic eye is 1m. The power of the lens required to correct this defect is
    In the problem, it is given that the near point of defective eye is 1 m and that of a normal eye is 25 cm. Hence u=−25 cm. The lens used forms its virtual image at near point of hypermetropic eye i.e., v=−1m=−100 cm. Using lens formula, we have :- v1​−u1​=f1​−1001​−−251​=f1​f=3100​=0.33mpower=f(inmetres)1​=+3.0D
    Author: rikazzz Comment
    Physics
    The Law of Kepler is related with which among the following ?
    The Law of Kepler is related with planetary motion.
    Author: rikazzz Comment
    Physics
    Speed of sound is maximum in which among the following?
    We know that, in solids all the particles are packed together and hence sound can travel from one to one very fast. Hence, speed of sound is maximum in solids and decreases from solids to liquids and liquids to gases. Sound can’t travel through vacuum.
    Author: rikazzz Comment
    Physics
    What is another name for energy of motion?
    Kinetic energy is the energy of motion.
    Author: rikazzz Comment
    Physics
    Electrical burns occur principally because of
    Electrical burns are among the most serious burns and require immediate medical attention. They occur when electric current flows through tissues or bone, generating heat that causes tissue damage. Arc or flash burns result from high temperatures caused by an electric arc or explosion near the body.
    Author: rikazzz Comment
    Physics
    The snow on the mountains does not melt all at once when it is heated by the sun because:
    Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And when snow does melt, it is not because of the sunlight. It melts because of the warm air from the sea.
    Author: rikazzz Comment
    Physics
    Solar eclipse will take place when
    Solar eclipse will take place when the moon is between the sun and the earth.
    Author: rikazzz Comment