The image formed on retina is MCQ with Answer and Explanation

Explanation:
Kinetic energy (K) and momentum (p) are related by K = p^2 / 2m. If momentum increases by 50%, the new momentum p' = p + 0.5p = 1.5p. The new kinetic energy K' = (1.5p)^2 / 2m = 2.25 (p^2 / 2m) = 2.25 K. This means K has increased by 1.25 K, which is a 125% increase. Understanding quadratic relationships is crucial for such problems.

Explanation:
Manometer measures pressure difference. Barometer atmospheric pressure.

Explanation:
Sound travels fastest in solids. Iron ~5000 m/s.