Answer: low pressure
Explanation: Air at the equator is warmer and the air above expands, becomes less dense and rises
Answer:
It has two isomers; n-butane and isobutane. Here n-butane is a straight-chain compound with four carbon atoms bonded with single covalent bonds. Explanation: Butane is an alkane with four carbon atoms so molecular formula is C4H10.
Explanation:
The season that is starting is winter.
The answer to 21 is (4)
No, it is very unlikely for that to happen.