Answer:
the answer is the 4th one. the speed of sound is lowest in gas and highest in solid and its because the molecules in solid is closer to each other than the molecules in gas and when the molecules are close to each other, they allow the waves of the sound to travel more quickly.
The Earth is around 4 times as big as the moon.
Answer:
All halogens have the same NUMBER OF VALENCE ELECTRON
The group pf periodic table is based on their valence electron
Hope this is correct and helpful
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Answer:salt pushes up the boat or the vessle of carriage
Explanation:
