ICSE − Q & A

A metal ball coated with soot appears to shine underwater.
A person's face sitting near a campfire appears to shimmer.
Optic fibres along the road shine brightly during daytime
A person experiences mirage in a desert
Stars appear to twinkle in the sky
A truck driver sometimes sees a pool of water ahead of him on a road
Give Reasons pls

Give Reasons-
1.A light mass and heavy mass have equal momentum.Which will have more KE,Why?
2.Two equal and opposite forces act on an object.How is its motion affected?Give Reason.
3.What is the advantage of using a concave horse shoe magnet over straight magnet in electric motors.
4.If u place ur ear close to an iron railing which is tapped some distance away you hear the sound twice
5.The lower block of a block and tackle pulley must b of negligible weight.
6.The sun is seen few minutes before sunrise above the horizonand even after it sets.
7.The scissors for cutting cloth may hv blades longer than the handle,but shears cutting metals have short blades and long handles
Hope to get answers soon:)

Can somebody send the solution of the last numerical (Q31) of exercise 8B. ( SELINA concise physics)

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SOUND CHAPTER PART B CONCISE SHUDNT THE SUBSCRIPT:SHUDNT THE RATIO OF THE WAVELENGTHS BE 6:3:2 AND NOT 3:2:1?

another trick q
difference between AN MCB and AN ELCB (3)
DONT WANT THE GOOGLE ANS PLZ.

Why does effect of friction only affects the mechanical advantage and not the velocity ratio...pls. stress upon the velocity ratio part that why isn't it affected??

Do we need to do diagrams on page 97 of concise book???

in radioactivity do we have to show the working or direct ans is fine?

derive newtons first law from second law??