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Q. An object of size 3.0 cm is placed 14cm in front of a concave lens of focal length 21 cm. Describe the image produced by the lens. What happens if the object is moved further aw
(i)Most of the alpha-particles pass by the foil straight away undeflected. (ii)Some of them are deflected by small angles. (iii)A few alpha-particles (1 in 1000) are deflecte
Q. What is Coulomb? One Coulomb is describe as the quantity of charge which when placed at a distance of 1 metre in air or vacuum from an equal and similar charge experiences a
what is meant by cryotron?
A boy throws a ball of mass 20 kg vertically upwards.It raises to a maximum height of 100 m.At what height will the kinetic energy be reduced to 70%?
The differential equation of motion of freely oscillating body is given by 2 d 2 x/dt 2 + 8π 2 x = 0. Evaluate the natural frequency of the body?
What is the wavelength of electromagnetic waves of frequency 5 x 1019Hz in free space? Give its two applications.
4
A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, What impulse did the ball receive? Ans - 3 Newt
Q. Explain the steps to the scientific notation? Answer:- To write in scientific notation you must first move the decimal point of the number to where the number is betwee
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