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an object moves along the x axis according -to the equation x(t)=(3t^2-2t+3)m .determine (a) the average speed b/n t=2sec and t=3sec,(b) the instantaneous speed at t= 2s and t=3s (
An oil film (n = 1.45) on the surface of a puddle of water on the street is 118 nm thick. What frequency of light would be reflected? 2d= (m+1/2)λ/n oil
Q. What are non-polar molecules? Give an example. i) A non-polar molecule is one in that the centre of gravity of the positive charges coincides with the centre of gravity of
what is quantum gravity
A battery of emf 2v and internal resistance 0.1 ohm is being charged with a current of 5A. In what direction will the current will flow inside the battery? Ans) In charging cond
At what temperature would the average speed of helium atoms equal (a)the escape speed from Earth, 1.12 ´ 10 4 m/s, and (b) the escape speed from the Moon, 2.37´ 10 3 m/s? (See Ch
A load of P57 kN is being hoisted at a constant speed by the motor, M which has a weight of 0.5kN. The beam has a weight of P58 N/m. Assume that the hoisting has stopped at the pos
Explain why easier to pull a lawn roller than to push it? Explaination : In Pulling, effective weight of lawn mover= mg-fsinx In pushing, effective weight = mg+
difference between like and unlike forces
Advantages of high transmission voltage A) Decreases volume of conductor material: B) Enhance in transmission efficiency C) Reduces percentages line drop
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