Which reacts faster, rock salt or grains of salt? Why?
1 answer:
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Answer: solid
Explanation: Chemical reactions are those which involve rearrangement of atoms.
Chemical changes are accompanied by following changes:
1) Absorption or release of heat
2) Change in color
3) Formation of gas bubbles
4) Formation of a solid product called as precipitate
Example of formation of precipitate or solid in chemical reaction:
Answer : The wavelength is
Solution : Given,
frequency = 29.2 Hz
Formula used :
where,
= frequency
= wavelength
c = speed of light =
Now put all the given values in this formula, we get the wavelength.
Therefore, the wavelength is