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A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?
A thermostat is a device for
A thermostat is a device which is used for
A thin oil film on a water surface seems coloured as of
A thin rod of a diamagnetic substance is suspended in the magnetic field between the north and south poles of a big magnet. The rod will set itself
A transformer is used to
A transformer works on the principle of
A transformer works with
A travelling wave passes a point of observation where the time interval between successive crests is 0.2 s. Which among the given is then true?
A veena player compares with a tuning fork the fundamental frequency generated by one of the strings of the veena and hears 4 beats per second. He then tightens the string a bit and hears only 3 beats per second. Then
