Physics Radiocarbon is produced in the atmosphere as a result of Action of ultraviolet light from the sun on atmospheric oxygen. Collision between fast neutrons and nitrogen nuclei present in the atmosphere. Lightning discharge in atmosphere. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere. Action of ultraviolet light from the sun on atmospheric oxygen. Collision between fast neutrons and nitrogen nuclei present in the atmosphere. Lightning discharge in atmosphere. Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere. ANSWER DOWNLOAD EXAMIANS APP
Physics What is a compound microscope? A microscope that has two sets of lenses : an occular lens and an eyepiece. A microscope whose lenses are concave. A microscope whose lenses are convex. A microscope that has one lens. A microscope that has two sets of lenses : an occular lens and an eyepiece. A microscope whose lenses are concave. A microscope whose lenses are convex. A microscope that has one lens. ANSWER DOWNLOAD EXAMIANS APP
Physics Acceptable noise level for human ear < 85 db > 85 db = 85 db None of these < 85 db > 85 db = 85 db None of these ANSWER DOWNLOAD EXAMIANS APP
Physics A piece of wood is held under water. The upthrust on it will be: More than weight of the wood Equal to the weight of the wood Less than weight of the wood Zero More than weight of the wood Equal to the weight of the wood Less than weight of the wood Zero ANSWER DOWNLOAD EXAMIANS APP
Physics Red light is used for signals because it has High intensity High frequency Low refraction in the medium Long wavelength High intensity High frequency Low refraction in the medium Long wavelength ANSWER DOWNLOAD EXAMIANS APP
Physics A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height? 2.87 sec 5.41 sec 3.44 sec 4.65 sec 2.87 sec 5.41 sec 3.44 sec 4.65 sec ANSWER DOWNLOAD EXAMIANS APP
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