The water fountain temperature starts at 5 degrees when I fill my bottle up. By the time it’s full the temperature is 14 degrees. The bottle is 2 litres so what temperature is my water?

cool

way closer to 14 than 5, I imagine

why do you fill it all at once ?

That’s what thermometers are for.

All we can say for sure is that it will be >5C.

I’m thinking the simple solution…9.5 degrees (assuming a linear decrease in temp of the water)

way closer to 14 than 5, I imagine

why do you fill it all at once ?

Saves having to keep getting up to go fill the bottle.
No totty on the way there so no point in making several trips 😛

If you assume that the bottle fills at a constant rate, and the temperature of water from the fountain rises at a constant rate, and disregard any temperature gains/losses to the bottle material and it’s surroundings, then I’m fairly sure it should be 9.5 degrees.

Saves having to keep getting up to go fill the bottle.
No totty on the way there so no point in making several trips

Then it’s largely irrelevant as the water will warm to whatever the ambient temperature of your office is.

Try the cold tap – it’s much more reliable for delivering cold water.

If you assume that the bottle fills at a constant rate, and the temperature of water from the fountain rises at a constant rate, and disregard any temperature gains/losses to the bottle material and it’s surroundings, then I’m fairly sure it should be 9.5 degrees.

Correct, but I doubt those are valid assumptions (certainly the linear change in temp of the water).
A thermometer will tell you the answer of course!

2 litres?

Are you using it for washing as well?

A question i ask myself twice a day “should I flush or show someone?”

I hope you dont touch the nozzle of the water dispenser against the opening of your bottle.

Forgive my ignorance but how do you know the temperature of the water at the start and end of filling?

5 degrees, the watercooler temp’ goes up because there is more air than water in it after you’ve filled your bottle.

Hence it is 5 degrees again when you refill. 😀

what temperature is my water?

So, you’re holding the bottle and the air inside it is likely to be warm (unless we’re talking about a Sigg/metal bottle) therefore if the fountain gives a reading of 14 it is likely to be warmer than this in the bottle at the end.

The room temp (sounds high if you need 4l in a working day!), way you hold the bottle, bottle material etc need to be known for a decent calculation. Also the location of the thermometer in the fountain plays a part given the air issue mentioned above!

The real question is; “what tyres for occupational thermodynamics?” And what argoose said.

Forgive my ignorance but how do you know the temperature of the water at the start and end of filling?

We have a digital display on our fountains! How techy is that!?