How long should I wait until 0.5 liters of water in a 2 liter

Newtons law of cooling. Get to it lad

>>8654121
I will get to it eventually but right now I'd like someone to quickly evaluate this for me.

I just learned this recently, don't you need either a "k" constant or a certain time to solve this?

>>8654138
about 17 minutes.

>>8654474
Goddammit, that's just too much.

>>8654116
but you also need to know;
the air density in the room
amount of pressure in the room
diameter and height of the kettle
the reactive characteristics of its plastic
Global place of your house and the current weather
that you're a faggot

to be able to exactly calculate that.

>>8654116
5 minutes or so. Put your hand into it. As long as you feel instant strong pain, it's above 65 deg C

File: 1486326018866.jpg (481KB, 1089x1166px) Image search: [Google]

481KB, 1089x1166px

>>8654116
1. Buy a thermometer
2. Calculate the constant k for the open kettle with the water in it with Newtons law of cooling
3. Solve the equation with the k
4. Fail as Newtons law of cooling is only accurate sometimes.

>>8654116
heat water to 100 degrees and to 85 degrees
pour into plastic kettles
touch both and remember sensations
touch kettle until it matches the way the 85° one feels

That ballpark is good enough

>>8654116
just make a thermocouple by yourself, are you STEM or what?