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why gravitational energy for a system of particles is found by first finding the gravitational energy between individual particles and then adding it up? Ans) It is a scalar qua
EXAMPLES: (i) A book lying on the table remains at rest until it is listed or pushed by exerting a force. (ii)A rolling ball on the ground comes to rest after covering some
Write down a short note on the discovery of neutron. Show the uses of radioisotopes.
It is the need of elastic strength of a substance when subjected to repeated stresses and strain. If the substance is reserved undisturbed for some time, the previous properties ar
Volt; V (after A. Volta, 1745-1827) The derived SI unit of electric potential, explained as the difference of potential among two points on a conductor carrying a constant cur
What is the mass of a two stage launch vehicle capable of putting a 100kg satellite into orbit around Mars, beginning in a parking orbit altitude at Earth of 200 km. Solve this pro
In the circuit shown in Figure, the slider S is at the half-way point. (a) Calculate the p.d. across and the current flowing in the 400 Ω load resistor. (b) Is the circuit a
A metal has a work function of 4.80 eV. Will ultraviolet radiation with a wave length of 385 nm be able to eject a photoelectron from the metal?
Determine the average kinetic energy of each type of molecule? A cylinder contains a mixture of helium and argon gas in equilibrium at temperature of 149°C. (a) What is the a
For a negative point charge, the electric field vectors: a) Circle the charge b) Point radially in toward the charge c) Point radially away from the charge d) C
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