<body> Curiosity Is A Door To New Dicoveries
...she's Beautiful

Joyi Koh
Capricon
13 January is my day(:
PLMGPS / PLMGSS Thank SOPHIA for helping me with the codes(:

...Other scientists

SOPHIA(:
DORCAS
MELISSA
LISA
LISHAN
RACHEL
RADIANT
JANELLE
JASLEY
SEOWHWEE
STELLA
STACY
SARAH
SHIYU

...EXHIBITIONS

  • March 2009
  • April 2009
  • May 2009
  • July 2009
  • January 2010
  • February 2010
  • March 2010
  • April 2010
  • May 2010
  • July 2010
  • August 2010

    •

    ...Yackie Yack Yack



     

    ...Lost in beauty

    layout design, coding,  photo-editing,

    by ice angel



         Brushes- 1| 2

    Saturday, February 27, 2010


    Heat Adventures

    www.youtube.com (by logindoss)

    the beauty exposed ;



    Conduction trick



    www.youtube.com (by Socoolscienceshow)

    the beauty exposed ;



    Heat by convection


    www.youtube.com (by jberes87)

    the beauty exposed ;



    Snell's Law


    www.youtube.com/watch?v=dWwQq12BkVc


    www.youtube.com/watch?v=PGxCCZJ_hNw

    the beauty exposed ;

    Monday, February 22, 2010




    Formation of Rainbows???

    A rainbow is formed when sunlight enters the rain drops and is dispersed into many rays of colours.

    They are not only formed after the rain, but even when there are suspended drops of water like in waterfalls and fountains, or the sprays of water on the ocean, in mist and so on.

    We need to stand with the sun behind our backs to see a rainbow. The rays of the sunlight are reflected within the raindrops and are cast back to the observer's eyes.
    Search engines: www.google.com

    the beauty exposed ;



    What are photoreceptors??

    Basically, they translate light rays into electrical signals and send them to the brain.
    They detect red, blue and green, which are the primary colours.

    Search engines: www.google.com

    the beauty exposed ;




    Disappearance of the test tube???

    When glycerin is poured into the test tube, which is placed in the boiling tube, apparently, it 'disappears'! Why???

    Basically, the glass (pyrax) and glycerin have the same reflective index.
    Search engines: www.google.com
    Videos below:

    www.youtube.com/watch?v=6BMievKy2U8

    www.youtube.com/watch?v=eCxcyZFFIOO

    the beauty exposed ;



    Kirchoff's first law?

    The sum of currents entering a juction of an electric current= sum of current leaving

    the beauty exposed ;

    Saturday, February 20, 2010



    Difference between ammeter and voltmeter?

    Ammeter
    1. must be connected in series
    2. measure current
    Voltmeter
    1. must be connected in parallel
    2. measure voltage/ potential difference
    Search engines: www.google.com

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    Potential Difference

    S.I Unit: voltage (V)

    It is the amount of energy needed to move one unit charge of electricity from one point to the other. (between two points)

    Just like diffusion, the charges move from higher potential energy (postive terminal) to lower potential energy (negative terminal).


    Voltage

    Voltage is the amount of energy the electrons receive from a source of current.

    A voltmeter is used to measure the potential difference. Smaller values are measured with millivoltmeter or microvoltmeter.

    It must be connected in parallel in a circuit.

    The positive terminal of the voltmeter must be connected to the positive terminal of the cell or battery. Same goes for the negative terminal.

    the beauty exposed ;



    A Few Recaps before common tests!

    Electricity:

    Definition: Electric current is the rate of flow of electrical charge, often negatively charges (electrons).

    S.I Unit: Ampere (A)

    Ammeter is used to measure electric cuurent flow in the circuit and must be connected in series.

    The positive terminal (RED) of the ammeter must be connected to the positive terminal of the cell or battery. same goes for the negative terminal (BLACK).

    Smaller values of current can be measured in milliamperes and microamperes.

    Conversion:
    1 Ampere= 1000 milliamperes(mA)

    the beauty exposed ;

    Monday, February 8, 2010




    Can't touch switches with wet hands??

    Basically, all water conduct electricity as they have some ionic content (H+ and OH- ions). Sweaty hands contain salt, which has free electrons and ions, thus, sweaty hands conduct electricity better than wet hands, as in literally wet as one had just washed his/her hands.

    This answers our question above. Touching switches with wet hands will lead to electric shocks.

    Search engines: http://www.wiki.answers.com

    the beauty exposed ;