about 100 degrees Celsius
Depends on where you live.
What temperature is the tap water? A little will dissolve in room temperature tap water, but if you raise the temperature of the water more sugar will dissolve. If you boil the sugar, it will break down into two simpler sugars and won't precipitate when the water is cooled.
by putting thermometer in water
Beer boil at a higher temperature than tap water because contain many solutes.
Because you need to measure the temperature of water, not the air.
Depends on where you live.
about 7.3 degrees Celsius
around 54 degrees Fahrenheit
55
No, it isn't faster, tap water freezes just at the same temperature as tap water
Salt water can be any temperature you like, so depending on your tap water's temperature it's either yes or no.
What temperature is the tap water? A little will dissolve in room temperature tap water, but if you raise the temperature of the water more sugar will dissolve. If you boil the sugar, it will break down into two simpler sugars and won't precipitate when the water is cooled.
by putting thermometer in water
Maybe around 25ºC, depending on several factors.
after 30 seconds the temperature of the water is 19 degrees.
Beer boil at a higher temperature than tap water because contain many solutes.
It depends on the temperature of the tap water.