Top 10 Unknown Facts About Dr. Bhimrao Ramji Ambedkar #shorts

Consider the following statements: A body weighs less at the equator then at the poles because: 1. earth rotates about its axis. 2. the ice cap at the poles increases gravitational pull. equatorial diameter is greater than the polar diameter. of some unknown facts. Which of the statements given above is/are incorrect?

Determine the height of a mountain if the elevation of its top at an unknown distance from the base is 30o and at a distance 10km further off from the mountain,along the same line,the angle of elevation is 150. (Use tan150=0.27)

It is possible to take a high quality photograph of a very fast moving object by illuminating the object for quite a small fraction of a second. You may have come across photographs of a bullet penetrating a banana or an apple in many text books or magazines. This is called 'stop action' photography because the fast moving object travels a very short distance during the time of illumination. Harold Edgerton, the inventor of stroboscope, was a pioneer of this kind of photography. A normal photographic plate works properly if it receives an energy of 4J during the exposure. To release this energy in a very small fraction of time, huge amount of power is required. Such huge power can not be generated directly from a battery because of its high internal resistance. To produce such power a capacitor is used. The time in which a capacitor discharges can be very short. Although, theoretically it would take a long time for a capacitor to discharge completely, it discharges almost completely in about 10 time constant. Consider the following situation A capacitor of 200muF storing 4J energy is made to discharge through a flash light in 2ms. This setup is used to take the picture of a bullet moving at a speed of 100m//s Assume that the flash light acts as a resistor and there is no other resistance in the circuit. What is the order of energy delivered to the flash light in 0.2 ms(approx).