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Q. If an object isn't moving, no external force acts on it.
No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example: Sitting on a chair, the chair pushes up on you while gravity pulls you down, but you aren't going anywhere because those forces cancel each oyher and net force is equal to zero.
Micrometer Simulation A Micrometer is used to measure the external dimensions of objects that are 3 cm or smaller, this provides precise measurements to inside 0.01 mm. The
The value of G, the universal gravitational constant, was measured experimentally by: a) Newton b) Cavendish c) Copernicus d) Kepler Ans: The value of th
A symmetric, multimode slab waveguide has a core width 2ρ, a uniform cladding index n cl and a linear, graded-index profile n(x) in the core that is continuous and symmetric about
Which of the following particles has more electrons than neutrons: (1) C (2) F- (3)O -2 (4)Al +3 Ans: O -2
Q. Give any three properties of electric lines of force. Properties of lines of forces: (i) Lines of force begin from positive charge and terminate at negative charge. (ii
Distinguish between a terrestrial telescope and an astronomical telescope. Explain Rams dens' eye piece with the help of a neat diagram. Illustrate its advantages and disadvantages
what is cyclotron
Q. Why the centre of Newton's rings pattern appears dark? The thickness of the air film becomes zero at the point of contact of lens L with glass plate P. Therefore there is no
The earth "spins" (rotates) on its axis based on the action of the materials that accreted to form it, and also on any large collisions it might have undergone. Like the one in the
What are Solid core or multicore? It will depend on the use to that the optic is put and the actual installation conditions. Solid core optics has usually, a larger bending rad
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