Concept of projectile motion

Question Two second after projection, a projectile is moving at !!30^0!! above the horizontal; after one more second it is moving horizontally. Then: a) Angle »

Concept of prism angle

Question: A thin prism !!P_1!! of angle !!4^0!!, and made from a glass of refractive index !!1.54!!, is combined with another thin prism »

Concept of Atomic weight

Question: !!P!! and !!Q!! are two elements which forms !!P_2Q_3!! and !!PQ_2!!. If !!0.15!! mole of !!P_2Q_3!! weights !!15.9g! »