Explain why does sun appear flat during sunrise and sunset?
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What is Virtual image ?
why glass is more elastic than rubber?
How many femtometers are in a nanometer?
Explain the difference between a lens and a mirror?
what happens to the period of a simple pendulum taken into a deep mine
Why are cloudy nights usually warmer than clear ones?
What is time?
The gas that used in bulb is............? a) Oxygen b)nitrogen c)hydrogen d)co2
Why is diamond cut to make if brilliant ?
what is mariners compass
You want to magnetize a metal. How would you do that?
A 100W bulb and 60 bulb both rated at 220V are connected in series across 220V supply. If 60W bulb is removed and only 100W bulb remains in the circuit, will illumination increase or decrease?