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The string of a pendulum is horizontal. Mass of the bob is m. Now the string is released, what is the tension in the string at lowest position Ans) If string length is L, Conserving energy, velocity at lowest point is (2gL)1/2 Centripetal force mv2/L= 2mg. T- mg= mv2/LT= 3mg
Explain the term 'critical frequency' in relation to sky wave propagation of electromagnetic waves. On a particular day, the maximum frequency reflected from the ionosphere is
A wheel is mounted on a stationary axle starts at rest and is given the following angular acceleration a =(9-12t) (SI units)where t is the time after the wheel begins to rotate.Fin
The drag on a submarine moving below from free surface (surface wave are not important) is to be determined by a test on a 1/15 scale model in a water tunnel. The velocity of the p
how may six digit numbers can be made in which the sum of the digits is even?
Second; s: The basic SI unit of time, explained as the period of time equal to the duration of 9 192 631 770 periods of the radiation equivalent to the transition among two hy
(a) Distinguish among metals, insulators and semiconductors on the basis of their energy bands. (b) Why are photodiodes used preferably in reverse bias condition? A photodiode i
Comparing a DC circuit to the flow of water A normal DC circuit has a DC voltage source lighting a light bulb. Also displays are a hydraulic system in that water drives a turbi
Explain the Thermodynamics - Heat and Work Thermodynamics is an area of science which looks at how changes in energy, work and the flow of heat influence each other. It can exp
Fusion Reaction: In nuclear fusion light nuclei are brought together to form a relation heavier nucleus. They energy free in nuclear fusion is larger than that free in fission.
Electrical materials: Materials which allow an electric current to flow easily are known as conductors and those which prevent the flow of an appreciable current are known as i
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