How do fireworks turn into shapes like hearts and stars?
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What two properties of electromagnetic waves are used to attach info to radio signals?
Explain how the height of a mountain is approximately measured by means of thermometer readings ?
if 100W and 200W bulbs are connected in series to a supply which bulb will glow brighter and why
Explain what is time?
Can a solid and liquid together be possible?
The magnitude of electrostatic force between two identical positive ions that are separated by a distance of 5.0 x 10– 10 m is 3.7 x 10–9 N. (a) What is the charge of each ion? (b) How many electrons are “missing” from each ion?
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Explain the index of refraction of air?
On breaking a magnet, how many poles will be got ?
Consider earth's equator is covered with a measuring tape touching the ground such both the ends touch each other. if the tape is lifted 1 meter from the ground, what would be the distance between two ends of tape?
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Define weight?
When the seas freeze in-winter, the fish never die why?