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At a distance of 4,000 ft from the launch site, a spectator is observing a rocket being launched. If the rocket lifts off vertically and is rising at a speed of 600 ft/sec when it is at an altitude of 3,000 ft, how fast is the distance between the rocket and the spectator changing at that instant?Solution) Distance=s=√(40002+h2), rate of change of distance=ds/dt=(ds/dh)(dh/dt)=(d(√(40002+h2)/dh)(dh/dt),dh/dt=600 ft/sec
Beat period : The time interval among two successive beats is called as beat period. Beat frequency : The number of beats given per second is called as beat frequency.
Factors on which Magnetic Force Depends: The magnetic force depends on following factors: 1. Nature of Pole: Like poles repel each other and unlike pole attract each other.
If 10 9 electrons move out of a given body to another body every second, how much time is required to get a total charge of 1C of the other body? ------------------------------
limitation of electrostatic sheilding
Q. Describe the method of measurement of the thickness of a thin transparent mica slit using Fresnel's Bi-prism. Give necessary theory. Draw suitable diagram. Measurement of
define
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