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The atomic weight of an element is double its atomic number. If there are four electrons in 2P orbital, the element is : (1) C (2) N (3) O
a balloon is filled with 100 kg of helium, and that the velocity is 2.0 m / s what is the external kinetic energy?
Ceramics are materials made by higher temperature firing treatment of natural clay and certain inorganic matters. Structurally ceramics are crystal bonded together. Other materials
Q. What is meant by doping? The process of addition of extremely small amount of impurity into an intrinsic semiconductor is called doping.
Q. State any three laws of photo electric emission? (i) For a specified photo sensitive material there is a minimum frequency called the threshold frequency below which emissio
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?
Simple gears With a hammer and a medium-sized nail, make holes in the exact centres of various used bottle caps. Straighten the edges of the caps to make them as round as possi
A Neutron Star is formed in the aftermath of a Supernova explosion. The star was originally rotating with a period of 20 days and had a mass of 2x10 30 kg and radius of 6x10 8 m.
A small bucket of mass M kg is attached to a long inextensible cord of length L m. The bucket is released when the cord is in horizontal position. At its lowest point the bucket sc
In solids, heat is move from conduction. We will study conduction of heat energy by a solid bar in the following section. Given a solid bar of thickness and area of cross-sectio
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