WikiWirral Online with you since 2003, fantastic.
Forum Stats
12254 Members
65 Forums
72899 Topics
982766 Posts
51 posts in the last 24hrs
Max Online: 7831 @ 8th Apr 2013 4:18pm
Who's Online - Click Me
82 registered (alan128, 15 invisible), 1906 Guests and 310 Spiders online.
Key: Admin, Global Mod, Mod
Social Media : Follow Us


(Views 7days)This Weeks Most Read
Boom : New Ferry Explosion 2364
Incident at Westminster 1669
Offset number plates 545
Death at Leasowe Train Station 386
Huge Gas Explosion in New Ferry Sat 25/03/17 382
What does this all mean? 269
Planet Earth Tonight 263
Has Talktalk been hacked yet again? 233
Snowhite's Bird Rescue 198
Reclaimed floorboards needed. 192
New General Forums
hi
by norma67
26th Mar 2017 7:42pm
Clocks go Forward
by Mark
25th Mar 2017 3:01pm
Mannequin Challenge AKA MRI Scan
by fish5133
24th Mar 2017 11:20am
Surely the most honest add.....
by buddy
20th Mar 2017 5:43pm
New Wirral History
William Bernard's building, Birkenhead
by yoller
20th Mar 2017 4:27pm
1882 Plan of the borough of Birkenhead and Wards
by Dave_Wood
19th Mar 2017 11:57am
New Brighton Coop
by Mike_White
9th Mar 2017 12:48pm
Tranmere High School for Girls 1882 Chesnut Grove
by sarah708
6th Mar 2017 8:23pm
Whetstone Lane, Birkenhead
by MoretonExpat
6th Mar 2017 8:04am
Forum Tips
Photo Gallery Forums
Birkenhead Transport Museum 24th Feb 2017
fireworks on the Mersey last night
Topic Replies
hi
by Dilly
Yesterday at 11:36 PM
'March' Photo Competition.
by snowshoes
Yesterday at 10:58 PM
Boom : New Ferry Explosion
by fish5133
Yesterday at 08:27 PM
It's Broken : Forum Update
by Mark
Yesterday at 08:13 PM
Prescriptions
by diggingdeeper
Yesterday at 06:55 PM
Death at Leasowe Train Station
by fish5133
27th Mar 2017 11:12pm
What song are you listening to?
by Vanmanone
27th Mar 2017 3:50pm
Huge Gas Explosion in New Ferry Sat 25/03/17
by venice
27th Mar 2017 1:18pm
Incident at Westminster
by casper
27th Mar 2017 9:48am
March
M Tu W Th F Sa Su
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
Recent Posts : What's On ?
Planet Earth Tonight
by Excoriator
26th Mar 2017 10:31am
Lee and Cragg Quarries - Bacup
by Mark
23rd Mar 2017 7:43am
Topic Options
Rate This Topic
#783683 - 7th Apr 2013 10:39am IMPORTANT SAFETY NOTICE
venice Offline

Forum Master

Registered: 21st Jul 2011
Posts: 2628
Loc: Wirral
Many of you will know this information already , but as its been sent to me by my health and safety relative, I have promised to pass it on just incase it saves someone from a nasty accident.

Its been checked out on Snopes and appears to be true.



Subject: Boiling water in microwave


A 26-year old 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).

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 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 a local high school 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 any time 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 that has built up, the liquid does not boil, and the liquid continues to heat up well past its boiling point.

What then usually happens is that the liquid is bumped 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.

Top
Wirral Info : Advertising
Click me for more Information......

WikiWirral Numbers : Between 150 and 200 New Members Every Month. With Over 3,500 unique visits and 35,000 Page Views each day. Average +500 Search Engines Daily and over 1,000,000 Million Page views a Month. Advertising from 20 . Click Me
#783685 - 7th Apr 2013 10:47am Re: IMPORTANT SAFETY NOTICE [Re: venice]
muffermurphy Offline
Beginner

Registered: 8th Mar 2012
Posts: 5
Loc: wirral
there's a new fangled invention called the kettle out now.
give it a try laugh

Top
#783688 - 7th Apr 2013 10:54am Re: IMPORTANT SAFETY NOTICE [Re: venice]
Sallybear Offline
Smartchild

Registered: 5th Apr 2009
Posts: 587
Loc: Wirral
Nearly every microwave cooking instructions require you to let things stand. There is a reason for this. Also it never hurts to stir something while it is cooking in the microwave, if something was cooked in a pan you would do this, ok not water perhaps but anything else.

Top
#783695 - 7th Apr 2013 11:07am Re: IMPORTANT SAFETY NOTICE [Re: venice]
kittykat Online   content
Enthusiast

Registered: 1st Jan 2011
Posts: 166
Loc: Just here
You have a designated health & safety relative? seeyu

Top
#783700 - 7th Apr 2013 11:31am Re: IMPORTANT SAFETY NOTICE [Re: kittykat]
venice Offline

Forum Master

Registered: 21st Jul 2011
Posts: 2628
Loc: Wirral
Ha! ---our original one was called 'mother in law'

Top
#783720 - 7th Apr 2013 1:21pm Re: IMPORTANT SAFETY NOTICE [Re: venice]
Blueskier Offline
Enthusiast

Registered: 22nd Mar 2013
Posts: 194
Loc: Wallasey
This has been well known for some time. If you put something like a wooden stick in the water while it is heating it wont happen. Something about agitating the air in the water.

Top
#783775 - 7th Apr 2013 4:59pm Re: IMPORTANT SAFETY NOTICE [Re: venice]
beanie65 Offline
Member

Registered: 21st Dec 2012
Posts: 70
Loc: wirral
Here's a link to an experiment done on myth busters.
http://www.youtube.com/watch?v=1_OXM4mr_i0

Top

Moderator:  Mod 
Random Wirral Images

Click to View Topic.
Newest Topics
Death at Leasowe Train Station
by Mark
27th Mar 2017 10:02pm
KEYS found
by rocks
26th Mar 2017 11:48pm
hi
by norma67
26th Mar 2017 7:42pm
Huge Gas Explosion in New Ferry Sat 25/03/17
by Dogwalker59
26th Mar 2017 10:36am
Snowhite's Bird Rescue
by diggingdeeper
26th Mar 2017 2:44am
For Sale & Free
boxed 10 inch tablet for sale
by stumpyduck
26th Mar 2017 7:12pm
various fly reels and boxes of fly's
by brady
25th Mar 2017 10:48am
Challenge extreme angle grinder used once
by brady
25th Mar 2017 10:43am
White Hyundai I30, 2011 plate For sale, 1.4 petrol
by goodoldphil
24th Mar 2017 6:24pm
I am having a clear out!
by TheComputerLab
24th Mar 2017 4:01pm
Featured Member
Registered: 8th Nov 2011
Posts: 319
Newest Members
BoilerEngineer, flipmodefly, Noize, cartoonhead, shelleyc1990
12254 Registered Users
Today's Birthdays
No Birthdays
New Wirral Info
Planet Earth Tonight
by granny
25th Mar 2017 11:50am
Reclaimed floorboards needed.
by Gold_Moon
25th Mar 2017 10:45am
Has Talktalk been hacked yet again?
by Habdab
24th Mar 2017 10:25am
What does this all mean?
by venice
22nd Mar 2017 12:20pm
black contiboard locally?
by fish5133
21st Mar 2017 9:30pm
News : New Topics
Death at Leasowe Train Station
by Mark
27th Mar 2017 10:02pm
KEYS found
by rocks
26th Mar 2017 11:48pm
Another Terrorist Attack ? -London Islington
by fish5133
26th Mar 2017 3:03pm
Huge Gas Explosion in New Ferry Sat 25/03/17
by Dogwalker59
26th Mar 2017 10:36am
Boom : New Ferry Explosion
by diggingdeeper
25th Mar 2017 9:39pm
New Enthusiast Forums
Snowhite's Bird Rescue
by diggingdeeper
26th Mar 2017 2:44am
Offset number plates
by venice
23rd Mar 2017 1:24am
File too large
by Dilly
20th Mar 2017 10:41am
ford focus 1.6 t reg rattling
by Little_B
19th Mar 2017 11:02pm
Alloys refurb and colour change. The Wheel Deal.
by TheComputerLab
18th Mar 2017 9:17am
(Views 24hrs)Trending Newest Topics
Wirral Sunrise Sunset
Sunrise Wed 6:50am
Sunset Wed 7:42pm
Local Time Wed 2:53am
WikiWirral Can . . . .