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A solid substance has a molar volume which is smaller than that of its liquid phase. Which of the following statements regarding the solid-liquid phase transition is/are true?
Two boys A and B are at two diametrically opposite points on a circle. At one instant the two start running on the circle; A anticlockwise with constant speed v and B clockwise wit
Q. State any three uses of IR rays. (a) Infrared lamps are utilized in physiotherapy. (b) Infrared photographs are utilized in weather forecasting. (c) As infrared radia
It is based on the principle that conductivity of a semiconductor enhances with increase in the intensity of incident light. In this, a thin layer of some semiconductor (as
Q. What is Raman shift? In 1928 Sir C.V. Raman fined out experimentally that the monochromatic light is scattered when it is allowed to pass through a substance. The scattered
ROCKET PROPULSION: The motion of a rocket is an application of the law of conservation of momentum and Newton's 3rd law of motion. The gases ejected out from the combustion cha
It having of a Cu plate coated with a thin layer of cuprous oxide (Cu2O). On this plate is laid a semi transparent thin film of silver. When light fall, the electrons emitt
how much you will charge
A sphere of radius R touches two adjacent sides of a room.It also touches an inclined plane at a height of R/5 from the floor.the inclined plane moves towards the sphere at the spe
The number of electrons in one molecule of are: (1)22 (2)44 (3)66 (4)88 Ans: 22
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