To 'get into hot water' is to get into trouble - particularly in a trivial way.
No.
False
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specious
true
No, grapevine is a major root of rumours and false information.
true
NOOOOOOOOOOOOOOOO
Maybe Aqua, which means water.
Your first statement is false, water actually has a high specific heat and therefore is a good coolant.
You typically have your fingerprints and mugshot taken when you are arrested or charged with a crime. This process helps law enforcement to identify you and keep a record of your criminal history.
A good, or clear, conscience means that you have done nothing of to apologise for, or are ashamed of.
Well begun is half done, which means that success is more likely with a good beginning.