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  • Physics

    An object is dropped from a height of 20m above the ground what will be its speed just before it hits the ground?

    ByManoj Jaiswar April 30, 2023April 30, 2023

    The method that we using here is of energy conservation. Let us assume the mass of the object as m kg Since the object is placed at height of 20 m above the ground, it possess potential energy . It is given by PE = m x g x h = 20 mg Let us…

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  • Mathematics

    What number should come next in the series 5, 11, 23, 47, 95?

    ByManoj Jaiswar April 10, 2023April 10, 2023

    First number is 5 for next number, 5×2 + 1 = 11 for next number, 11×2 +1 = 23 next, 23×2+1 = 47 next , 47×2 + 1 = 95 for getting next number continue the same sequence, 95×2 + 1 = 191Next number in the series is 191

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  • Mathematics

    A two digit number is such that the product of its digit is 12. When 36 is added to this number, the digits interchange their places. Find the number

    ByManoj Jaiswar April 9, 2023April 10, 2023

    Let us assume that the required two digit number be as 10x + y Now, as per given data, xy = 12 and (10x + y) + 36 = 10y + x on solving , (10x + y) + 36 = 10y + x 10x + y + 36 = 10y + x 10x –…

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  • Physics

    What are transverse waves and longitudinal waves

    ByManoj Jaiswar April 6, 2023April 11, 2023

    Transverse Waves Definition – A wave in which particles of the medium vibrate in a direction perpendicular to the direction of propogation of wave is called as transverse waves .Example – Wave produced on rope. Characteristics of transverse waves👉 All particles of the medium in the path of the wave vibrate in the direction perpendicular…

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  • Physics

    Difference between binding energy and escape energy of a satellite

    ByManoj Jaiswar April 2, 2023April 2, 2023

    Let us first start with defining what is a satellite. A satellite is a moon, planet or a machine that orbits a planet or star. Binding Energy for a satellite Since they are moving in an orbit, so definitely there is an energy that is keeping the satellite bounded with the planet. The minimum amount of…

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  • Mathematics

    A person travelled by train for 1 hour at a speed of 50 km/hr. He then travelled by a taxi for 30 minutes at a speed of 32 km/hr to complete his journey. What is the average speed at which he travelled during the journey?

    ByManoj Jaiswar April 2, 2023April 2, 2023

    The formula to calculate average speed is, Average speed = Total distance / Total time distance travelled can be obtained by formula, distance = speed x time distance travelled by train = d1 = 50km/hr x 1hr = 50km distance travelled by taxi = d2 = 32km/hr x 0.5hr = 16km hence total distance travelled…

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  • Physics

    What are various types of vectors

    ByManoj Jaiswar March 31, 2023April 3, 2023

    Before knowing the types of vectors let us first understand what are vectors While learning physics we come across many physical quantities like momentum, speed, length, temperature etc. Now when we study them we need to represent them too. So for their representation we should know whether the quantity is a scalar quanitity or a…

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  • Physics

    What are eddy currents or Foucault current

    ByManoj Jaiswar March 31, 2023March 31, 2023

    Whenever a conductor or a part of the conductor is moved in a magnetic field such that it is cutting the magnetic field lines or placed in a changing magnetic field the free electrons in the bulk of the metal start circulating in closed paths equivalent to current loops. These loop currents resembles eddies in a fluid stream & hence…

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  • Physics

    How are Physics and Technology related

    ByManoj Jaiswar March 30, 2023

     Physics is a subject that deals with the physical phenomenon occuring around us, be it on microscopic scale or macroscopic scale.  It tries to explain us how the universe works & gives us an idea to build technology with the knowledge gained through it. Right from the discovery of electrons from heated cathode, that later got developed as…

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