Question

e reasons for the following: Naphthalene balls, when kept exposed, become All solids cannot be converted into liquids on hea Particles of a gas have high molecular mobility Gases are highly compressible, Weight is not the property of matter te law of conservation of masse​

Answer 1

Answer:

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Answer 2

Answer:

Given:u=−10cm               f=20cm        (convex lens)

To find: v and image's nature.

Solution: From lens formula

v1−u1=f1

v1+101=201

v1=20−1

v=−20cm

And magnification = uv=2

Hence image formed is virtual, erect and magnified two times.

An object 1cm high is placed at 0.20 m

from a convex lens of the Focal length

0.15m, the image

position and height areExample 3 Solve the equation x2 – 7x = 0 Factorising , x ( x – 7 ) = 0 either r = 0 orx - 7 = 0 x = 7 The solutions are x = 0 and x = 7 . ( a ) Solution by ...