Depends on where you live.
about 100 degrees Celsius
by putting thermometer in water
Beer boil at a higher temperature than tap water because contain many solutes.
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.
Because you need to measure the temperature of water, not the air.
around 54 degrees Fahrenheit
about 7.3 degrees Celsius
55
about 100 degrees Celsius
No, it isn't faster, tap water freezes just at the same temperature as tap water
The temperature of tap water is typically around 10-20 degrees Celsius.
Salt water can be any temperature you like, so depending on your tap water's temperature it's either yes or no.
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.
To adjust the water temperature, turn the hot tap for warmer water and the cold tap for cooler water until you reach the desired temperature.