Explain real and virtual image?
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What is anti - noise?
Is air travel time the same whether or not the plane is flying with or against the rotation of the earth?
how much mercury overflows when a glass vessel filled to the brim with 50 cubic centimeter of mercury 15°C is heated to 75°C of glass?
Why are the girders on the railway bridges fixed at one end only?
Why do we not feel the enormous weight of the atmosphere above our heads ?
Why is a jet of water curved on coming out of a horizontal nozzle ?
Explain when are intermolecular forces the strongest?
Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
Explain what does gravitational force depend on?
discuss the statement "almost all the energy from a cars engine ultimately goes to pushing air around and heating the brakes"
Explain refraction?
the resolutions of a michelson interferometer operating with a light source of 640nm wavelenth is A.1280nm B.640nm C.80 nm D.1nm