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Q. Why does the sky appear blue in colour? As-per to the Rayleigh's scattering law the shorter wavelengths are scattered much more than the longer wavelengths. The blue look o
One source of a star's energy is the fusion of two deuterons to form an alpha particle plus a gamma ray. a. Write down the nuclear equation for this fusion. b. Measure the m
A galvanometer together with an unknown resistance in series is linked across two identical batteries each of 1.5V. whenthese batteries are connected in series the galvanometer rec
If a meteorite hit the Earth and moved it 2.41x 10 10 m closer to Venus, How many days would there be in an Earth year?
Q. State the law of conservation of electric charges? The entirety charge in an isolated system always remains constant. For instance Uranium ( 92 U 238 ) can decay by emittin
Relative velocity of a boat in a river flowing at a given velocity horizontally Ans) assume the river to be stopped and measure relative velocity of boat and find angle.
The specific resistance of copper is 1.7ohm. find the resistance of copper wire of length 10m and diameter 1mm. solution) R=ρ*l/A so ou have ρ,l and r(radius). you can use the f
what are the advantages of using the thermo-electric thermometer over the mecury glass thermometer?
A woman wearing high heels briefly supports all her weight on the heels. If her mass is 45 kg and each heel has an area of 1.2 cm 2 , what pressure does she exert on the floor
Applications of cement mortar 1. It is used to carry out pointing and plaster works on exposed surface of masonry. 2. It is used to bind the building units like bricks, ston
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