Change of state form liquid to solid is _________?
A. Boiling B. Freezing C. Evaporation D. None of these
A. Boiling B. Freezing C. Evaporation D. None of these
A. a-rays B. X-rays C. b-rays D. U.V.-rays
A. Camera B. Spectroscope C. Cinema D. Periscope Explanation: Optical illusion is what that refers to persistence of vision with a principle that multiple images blend into a single image in human mind and what is showed in cinema. Hence, Persistence of vision is the principle behind cinema.
A. Meter B. Newton C. Kilogram D. None of these The SI unit of force is the newton, symbol N.
A. Density B. Weight C. Mass D. None of these
A. Sun B. Moon C. Star D. None of these
A. Four B. Three C. Two D. None of these
A. Fertilization B. Germination C. Vernalization D. None of these
A. Penicillin B. Yeast C. Water D. None of these
A. Lead B. Mercury C. Chromium D. Copper