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  1. 4 times linearly magnified image on a screen (image distance)/(object distance)=4 image distance=4object distance=40 cm required distance =40+10=50cm alternative by thin lens formula, 1/(image distance)+1/(object distance)=1/(focal length) 1/v+1/10=1/8 v=40

  2. A pendulum consisting of a bob of mass m connected to a light rod of length L is stood upside-down and given a gentle push to start it moving. (a)Find the centripetal force of the bob when the rod is (i) horizontal and (ii) at the bottom of the swing. (i...

  3. To put the answer in the right prspective, mobile phones communicate using electromagnetic (EM) waves of frequency from 900 MHz to 2100 MHz. EM waves travel by mutual interaction of electric and magnetic fields. Thus the wave does not...

  4. Don 't forget that there is a mercury bulb in the thermometer. The volume of...

  5. Don 't be so analytical in explaining why people taking drugs...

  6. don 't believe me , i try~ the force that push the rocket up is by the...

  7. vertical velocity is out of consideraton the horizontal velocity is 100m-1, assumed to be constant 25/100=0.25s it takes 0.25s to reach the target Ada shoots an arrow horizontally(take upward positive) vertical velocity=0 downward acceleration = 10 ms-2 as the...

  8. Your teaches should get mad with you as all your words and gramma are wrong. Go back to your seat and study as hard as you can, your teacher will love you when they know you are improved

  9. Don 't lose the time ! According to Q= Pt , we know that the...

  10. ... someday you will helpfind the answers. And even if you don 't, you may grow up in a time whenhumankind has a much clearer idea...