Microwaving Water

Microwaving Water!

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 buildup 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 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 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.'

90# on your telephone‏

I dialed '0', to check this out, asked the operator, who confirmed that this was correct so please pass it on . . . (l also checked out Snopes.com. This is true, and also applies to cell phones!)

PASS ON TO EVERYONE YOU KNOW

I received a telephone call last evening from an individual identifying himself as an AT&T Service Technician (could also be Telus) who was conducting a test on the telephone lines. He stated that to complete the test I should touch nine(9), zero(0), the pound sign (#), and then hang up. Luckily, I was suspicious and refused.

Upon contacting the telephone company, I was informed that by pushing 90#, you give the requesting individual full access to your telephone line, which enables them to place long distance calls billed to your home phone number.

I was further informed that this scam has been originating from many local jails/prisons DO NOT press 90# for ANYONE.

The GTE Security Department requested that I share this information with EVERYONE I KNOW

YOUR CAR KEYS as an ALARM SYSTEM

Put your car keys beside your bed at night. If you hear a noise outside your home or someone trying to get in your house, just press the panic button for your car. The alarm will be set off, and the horn will continue to sound until either you turn it off or the car battery dies.

This tip came from a neighborhood watch coordinator. Next time you come home for the night and you start to put your keys away, think of this: It's a security alarm system that you probably already have and requires no installation. Test it. It will go off from most everywhere inside your house and will keep honking until your battery runs down or until you reset it with the button on the key chain.

It works if you park in your driveway or garage. If your car alarm goes off when someone is trying to break in your house, odds are the burglar/rapist won't stick around... After a few seconds all the neighbors will be looking out their windows to see who is out there and sure enough the criminal won't want that! And remember to carry your keys while you are walking to your car in a parking lot. The alarm can work the same way there.

This is something that should really be shared with everyone. Maybe it could save a life or prevent a sexual assault.

My Mom has suggested to my Dad that he carries his car keys with him in case he falls outside and she doesn't hear him. He can activate the car alarm and then she'll know there's a problem.

P.S. I am sending this to every one I know because I think it is fantastic. It would also be useful for any emergency, such as a heart attack, where you can't reach a phone.