Physics

    Physics
    Which of the following is a renewable resource of energy?
    All of the above are renewable resource of energy.
    Author: rikazzz Comment
    Physics
    Which of the following is the second largest source of global energy?
    Data for 2013 shows that renewable electricity generation overtook natural gas to become the second largest source of electricity worldwide producing 22% of total electricity or 5,130 TWh. Some of the sources of renewable energy are: solar power, wind power, wave and tidal power, geothermal power, biomass and hydro power. Fossil fuels remained the bedrock of global electricity production with more than two-thirds (about 67%) of the total.
    Author: rikazzz Comment
    Physics
    Specific gravity is defined as the ratio of
    Specific gravity is defined as the ratio of density of the substance to the density of water.
    Author: rikazzz Comment
    Physics
    Decibel is a term connected with :
    Decibel is a term connected with sound.
    Author: rikazzz Comment
    Physics
    Which layer of the earth’s atmosphere reflect back the radio waves to the earth’s surface ?
    Ionosphere reflect back the radio waves to the earth’s surface.
    Author: rikazzz Comment
    Physics
    If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?
    The correct relationship among these wavelengths is_x000D_ LUV < lVIS < lIR.
    Author: rikazzz Comment
    Everyday Science
    An enclosure that sits atop the wind turbine and contains the gear box, low speed shaft and high-speed shaft, generator, controller, and brake is called
    The nacelle sits atop the tower and contains the gearbox, low- and high-speed shafts, generator, and brake
    Author: rikazzz Comment
    Everyday Science
    Bernoulli’s principle is based on the law of conservation of:
    Bernoulli’s principle states that The total mechanical energy of the moving fluid comprising the gravitational potential energy of elevation, the energy associated with the fluid pressure and the kinetic energy of the fluid motion, remains constant.
    Author: rikazzz Comment
    Physics
    An atom with more neutrons than protons is called
    An atom with more neutrons than protons is called isotope.
    Author: rikazzz Comment
    Physics
    Friction can be reduced by changing from
    Friction can be reduced by changing from sliding to rolling. Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.
    Author: rikazzz Comment