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Are Mobile Phones Dangerous? to the users health...
Posted 23 December 2004 - 08:58 PM
This calculation is not quite correct. It should be:
It may seem that mobile phones cause negligible radiation in comparison to microwave ovens but a simple calculation will show you the opposite.
If you talk on the cellular phone just one hour a day the whole radiation is as follows:
1 hr a day x 365 days a year = 365 hours
365 hours x 3 watts = 1095 watts
1095 watts x 10 years = 10950 watts!!!
Decide for yourself!
1 hr/day x 365 days= 365 hours
1 Watt = 1 Joule/s
365 hoursx 60 mins/hour x 60 secs/min = 1,314,000 secs
1,314,000 secs/year x 3 Watts = 3,942,000 Joules / year
So every year the cellphone emits 3,942,000 Joules, however not all of this gets absorbed by you.
Compare this energy release with that of sunlight:
The Sun emits 1370 Watts per square meter.
1370 Watts/m^2 x 0.5 m^2 = 685 Watts
1 hour x 60 mins/hour x 60 secs/min = 3,600 secs
685 Joules/s x 3,600 secs/hour = 2,466,000 Joules / hour
Compared to the energy of the Sun, the power of the cellphone is negligible. But the cellphone's energy is in microwaves while the Sun's energy is mostly in visible light, so we still can't tell if cellphones are that dangerous. I don't think that cellphones are that dangerous, but if you overuse them too too much they might be dangerous.
This calculation is also not quite correct:
The error is that weight does not accumulate, it only counts when the cars are on the bridge. If the bridge can hold up to 40000 kg, then that means it can hold a maximum of 40 cars at one time. As long as no more than 40 cars are on the bridge at one time, the bridge will not break.
View 1 is my view.
Let me give another example:
Cars are driving over a bridge with a frequency of 10 cars per minute. The bridge can handle upto 40000 kg. Each car weighs about 1000 kg.
10 cars = 10*1000 kg = 10000 kg
We then quickly find out that the bridge will break in
40000 kg / 10000 kg = 4 minutes!
Hope you guys enjoy this physics explanation!
Posted 23 December 2004 - 10:06 PM
Posted 24 December 2004 - 01:18 AM
THE QUESTION isn't are they safe? The REAL question is how fast do you want to "cook" your brain and how many brain cells can you afford to lose? Although the final evidence isn't in it's only a question of time before some slick lawyer brings a successful class action suit for the damage CP's are causing as the scientific evidence is accumulating daily. Remember the cigarette companys??. Am not saying the CPs industry is at fault, just that at some point this society has got to stop blaming others for an individual's total lack of common sense just because they were "told" it was safe.
Posted 04 January 2005 - 09:46 PM
Posted 26 January 2005 - 01:11 PM
I would have to say that radation from the cell phone, has it even killed anyone yet? Guessing not or else i would of heard about it, so it seems safe enough just to talk to people while out doing something.
Posted 26 January 2005 - 01:56 PM
Posted 22 March 2005 - 06:10 PM
Posted 30 March 2005 - 07:51 AM
That being said, the risks these days are minimal, Especially with text messaging. The less time the phone is next to your head, the better.
Posted 30 March 2005 - 02:09 PM
I have seen some medical reports suggesting that EM Radiation from cell phones can affect your ability to concentrate, but I am skeptical to say the least. I am willing to believe that the EM Radiation is more harmful to young children than adults, this only makes sense since thier skulls are still developing and the EM fields can reach more areas of the brain at once since a childs head is smaller. This makes sense. The only problem with the theory that these EM Fields are dangerous is there has been no substantial linkage, and there are sources of EM Radiation all around you all day, the cell is just one source.
The only thing dangerous about cell phones is the way people use them. I see so many people driving on the freeways while talking on the phone... come on people have you never heard of handsfree set? I have even seen people so wrapped up in there phone conversation that they cross a busy intersection without looking for traffic, saw that cause a pretty bad fender bender once.
The only other danger I have ever heard of that is reported to have substantial evidence to support it is that a cell can cause explosions while at a gas station filling up. The theory is that if you are filling up and your phone rings a small spark from the light that lights up when phones ring can cause the gas fumes to ignite. However any fans of mythbusters know this isn't true Click me for details.
Posted 15 April 2005 - 02:48 PM
But what time lears is that you only know of somthing is really dangerous (or not) if after a wile that can be 10 days or years you don't know...
Einstein didn't know what he put in to a formulla was oing to destroy a city and so are ther many other things that are bad (or good) for us that we thing at the time that is was invented was good for us (or bad).
Posted 19 April 2005 - 10:30 AM
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