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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
Explain about the crystalline solids in short. Crystalline solids: A solid possesses rigidity with a definite geometric pattern. Illustrations: Iron, silver, copper an
What is coulmb''s law
derivation by calculas method of Snth = (Sn – Sn -1) = u + a/2 (2n – 1)
A forced harmonic oscillator is at resonance with some periodic force. Evaluate the phase difference between the driving force and the velocity of the oscillator?
Q. What is ionisation potential energy? For hydrogen atom the energy necessary to remove an electron from first orbit to its outermost orbit (n=∞) is 13.6-0 = 13.6eV. This ene
What is a Temperature Scales? Fahrenheit, Celsius and Kelvin were scientists who studied how heat and temperature work. The most familiar scale to Americans (until the time tha
The experimental set-up for producing Newton's ring is shown in fig. (A). A plane-convex lenses L of large radius of curvature with its convexities is placed on a plane glass plate
how nicol prism is constructed?
How can we calculate the rate of effusion of nitrogen gas from a cylinder. and how much time it will take??
Infrared radiations and Ultra Violet radiations: What are infrared radiations and Ultra Violet radiations? Ans: Infrared: Wavelengths larger than visible light 2. Wav
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