Saturday, January 30, 2010
Electrons travel faster than light when in water???
In 1934, a Russian physicist, Pavel Cerenkov, speeded up electrons to 160 000 miles/sec in water. Light travels at 140 000miles/sec in water. Thus, in water, electrons travel faster than light!! Isn't it amazing?? For his work, he was awarded the Nobel Prize in physics in 1958.
Search engines: www.freewebs.com
the beauty exposed ;
Why does light travel FASTER than sound??
LIGHT is an electromagnetic wave, such as infrares and ultraviolet waves, that travels at 186 000 miles per second. But SOUND is a pressure wave that travels through air and other objects. The speed of the pressure is determined by the physical properties of the air.
Search engines: www.answerbag.com
the beauty exposed ;
Ever wondered what are umbra and penumbra shadows?
Umbra is the darkest part of the shadow, the light source is completely occluded, experiencing a total eclipse.
Penumbra is in which only a portion of the occulting body is obscuring the light source, experiencing a partial eclipse.
Search engines: www.wikipedia.org/wiki/umbra and penumbra
the beauty exposed ;
Saturday, January 23, 2010
What is a
WET CELL???Basically, it is a
primary cell with a
liquid electrolyte (contain free ions which make it electrically conductive). Search engines: www.wikipedia.comthe beauty exposed ;
Monday, January 18, 2010
Why is
red on top and
violet right at the bottom during dispersion??
Basically, when white light travels through the prism at different speeds, red is the fastest, thus, bending away from the normal, violet is the slowest, thus, bending towards the normal.
the beauty exposed ;
Did you catch the
solar eclipse on
15 JANUARY 2010??The
Solar Eclispe over the
Indian Ocean was known the
"Ring of Fire" as the
Sun and the Moon are exactly in line but the actual size of the
Moon's shadow is
smaller than that of the visible disc of the Sun. The covered Sun is therefore known as the "Ring of Fire".
It lasted for about
11 minutes 18 seconds on
15 January 2010.We should
never watch the eclispe with our
naked eyes too!
Search Engines: www.google.comthe beauty exposed ;
Friday, January 8, 2010
Are sports drinks acidic??
YES!! Sports Drinks are ACIDIC. They possess high content of sugar, addictives and mainly, CITRIC ACID.
Bad News!!
After prolonged consumption of sports drinks, you run the risk of damaging your teeth. According to my research, sports drinks weakens the tooth enamel, causing bacteria to "invade" and grow more easily. It can erode the dentin of your teeth as well.
Ways to reduce this risk:
- should be consumed quickly, preferably with a straw
- do not retain drinks in your mouth
- go for refrigerated sports drinks as the acid dissolution constant is temperature dependant
Search engines: www.brianmac.co.uk/drinks.htm
http://www.cnn.com/
the beauty exposed ;
Thursday, January 7, 2010
Can't sense our gloved hands??
A capacitive touch screen panel consisits of an insulator (e.g. glass), coated with a transparent conductor (e.g. indium tin oxide). As our body is a conductor, thus, it results in a distortion of the local electrostatic field when our fingers are in contact with the screen.
Therefore, wearing gloves will interfere with the transmission of electrical current between your fingers and the touch screen.
Search engines: http://en.wikipedia.org/wiki/Touchscreen
http://www.google.com/
the beauty exposed ;
Wednesday, January 6, 2010
The ice sticks to my fingers after taking out from the freezer! Why??
Basically, all of us have moisture on our fingers, and this moisture (water) instantly becomes frozen to the suface of the ice, thus resulting in a "sticky" feeling.
the beauty exposed ;
Why is red on top and violet right at the bottom during dispersion?? 
The ice sticks to my fingers after taking out from the freezer! 