Quote by someone who emailed me this
A man decided to have a cup of coffee. He took a cup of
water and put it in the microwave to heat it up (something that he had
done numerous times before). I am not sure how long he set the timer
for, but he wanted to bring the water to a boil. When the timer shut the
oven off, he removed the cup from the oven. As he looked into the cup,
he noted that the water was not boiling, but suddenly the water in the
cup "blew up" into his face. The cup remained intact until he threw it
out of his hand, but all the water had flown out into his face due to
the build up of energy. His whole face is blistered and he has 1st and
2nd degree burns to his face which may leave scarring. He also may have
lost partial sight in his left eye.
While at the hospital, the doctor who was attending to him stated
that this is a fairly common occurrence and water (alone) should never
be heated in a microwave oven. If water is heated in this manner,
something should be placed in the cup to diffuse the energy such as a
wooden stir stick, tea bag, etc., (nothing metal).
It is however a much safer choice to boil the water in a tea kettle.
General Electric's Response:
Thanks for contacting us, I will be happy to assist you. The e-mail
that you received is correct. Microwaved water and other liquids do not
always bubble when they reach the boiling point. They can actually get
superheated and not bubble at all. The superheated liquid will bubble up
out of the cup when it is moved or when something like a spoon or tea
bag is put into it.
To prevent! this from happening and causing injury, do not heat any
liquid for more than two minutes per cup. After heating, let the cup
stand in the microwave for thirty seconds! before moving it or adding
anything into it.
Here is what our local science teacher had to say on the matter:
"Thanks for the microwave warning. I have seen this happen before. It is
caused by a phenomenon known as super heating. It can occur anytime
water is heated and will particularly occur if the vessel that the water
is heated in is new, or when heating a small amount of water (less than
half a cup).
What happens is that the water heats faster than the vapor bubbles
can form. If the cup is very new then it is unlikely to have small
surface scratches inside it that provide a place for the bubbles to
form. As the bubbles cannot form and release some of the heat has built
up, the liquid does not bo! il, and the liquid continues to heat up well
past its bo iling point.
What then usually happens is that the liquid is b umped or jarred,
which is just enough of a shock to cause the bubbles to rapidly form and
expel the hot liquid. The rapid formation of bubbles is also why a
carbonated beverage spews when opened after having been shaken."
If you pass this on you could very well save someone from a lot of pain
and suffering.
Thank You Very Much.
Quote by dambuster
If you put a hot drink in a Thermos, it keeps it hot.
If you put a cold drink in, it keeps it cold.
I'm not bothered any more about how the flask knows whether to keep it hot or keep it cold. I'm just happy it does.
Yesterday (I think) I ping'd (tm Chard) a Roast beef and Yorkshire Pud dinner.
The destructions on the box said not to ping the Yorkshire Pudding, but oven it for whatever minutes at some numbers.
So - I set the "oven" part of it to bake (?) the pud. All well and good.
Pud out, turn it to "ping" mode.
"Put the meal and gravy in a tray and ping for 3 ish minutes."
Fecking thing melted the tray ! ! ! ! !
Now - if a £10 flask knows the difference between hot and cold, how come a £200 so called tossed off microwave/grill/conv(:confused/combi combo thingy doesn't know not to melt my plastic trays???
:confused:
Quote by O. K.
If you put a hot drink in a Thermos, it keeps it hot.
If you put a cold drink in, it keeps it cold.
I'm not bothered any more about how the flask knows whether to keep it hot or keep it cold. I'm just happy it does.
Yesterday (I think) I ping'd (tm Chard) a Roast beef and Yorkshire Pud dinner.
The destructions on the box said not to ping the Yorkshire Pudding, but oven it for whatever minutes at some numbers.
So - I set the "oven" part of it to bake (?) the pud. All well and good.
Pud out, turn it to "ping" mode.
"Put the meal and gravy in a tray and ping for 3 ish minutes."
Fecking thing melted the tray ! ! ! ! !
Now - if a £10 flask knows the difference between hot and cold, how come a £200 so called tossed off microwave/grill/conv(:confused/combi combo thingy doesn't know not to melt my plastic trays???
:confused:
Quote by VenusnMars
If you put a hot drink in a Thermos, it keeps it hot.
If you put a cold drink in, it keeps it cold.
I'm not bothered any more about how the flask knows whether to keep it hot or keep it cold. I'm just happy it does.
Yesterday (I think) I ping'd (tm Chard) a Roast beef and Yorkshire Pud dinner.
The destructions on the box said not to ping the Yorkshire Pudding, but oven it for whatever minutes at some numbers.
So - I set the "oven" part of it to bake (?) the pud. All well and good.
Pud out, turn it to "ping" mode.
"Put the meal and gravy in a tray and ping for 3 ish minutes."
Fecking thing melted the tray ! ! ! ! !
Now - if a £10 flask knows the difference between hot and cold, how come a £200 so called tossed off microwave/grill/conv(:confused/combi combo thingy doesn't know not to melt my plastic trays???
:confused:
Quote by SlydeWHOOSH
Best fun i find is to heat through some milk in a microwave then put it on the kitchen surface & add a metal spoon.......
WARNING: KIDS DON'T TRY THIS AT HOME (do it at your friends)
The cup carry on to cook & all of a sudden the work suface if full of bubbling milk.
Ahhhh the wonders of modern science, ow enthrawling but dangerous!!!
The WHOOSH Manâ„¢