Monday, July 24, 2006
lol. a quick recap of the day's work as promised
ss; test
english; modal verbs. (lame)
chinese; test
physics; LENSES
focal point (F) = the parallel rays converge. = the point the image is projected?
when object is further thn 2F, the image is inverted = REAL! and dimnished(small)
*camera and the eye*
when object is at 2F, the image is inverted again= REAL! but this time the image is exactly the same
*photocopier*
when object is before F, the image is magnified = VIRTUAL! and upright.
*magnifying glass*
when object is at F, the image is magnified = VIRTUAL! and the imae is at infinity. far far awayy ;D
*spotlight*
oya went thru test paper. remember: to include the speed of sound is constant!
frequency against wavelenght is inversely proportionate
vibrations of any musical isnt sound = transverse waves
my units -.-
maths; free period but never mind REVISION!
SYMMETRY PROPERTIES OF A CIRCLE;
1.OC is perpendicular to AB whereby C is the midpoint
2.if AB and CD are equal chords, the distance between them is equal
3.Tangent to the circle is perpendicular to radium
4.Tangents drawn from an external point to a circle are equal in length ( equal tangents from ext. pt.)
ANGLE PROPERTIES OF A CIRCLE;
1.Angles in the same segment are equal ( < in the same segment)
2.Angle at the center of the circle is always twice the angle at the circumference contained by the same arc
(< at the centre= 2 time < at the circumference)
3.Any angle at the CIRCUMFERENCE in a SEMICIRCLE subtended by the DIAMETER is a right angle ( right < in semicircle )
4.Angle formed by a tangent of a circle and a chord throught its point of contact is equal to the angle in the alternate segment (alt. segment theorem)
CYCLIC QUADRILATERALS ; all 4 vertices lying on the circumference
1.Opposite angles in a CQ are supplementary (< s in opp. segments)
2.In one side of the CQ, exterior angle formed = interior opp. angle. ??? lol
well that's all for today
after school went to Mac
thn i took the cheesburger for lynn
but apparently i took the wrong one!
thn lynn bit into it alr
and so did i
so when the person came to serve her special order,...!!!
lol in the end we got a free burger ;p
went home alone and slep for awhile on the mrt
ahah nearly missed my stop.
YESTERDAY
had music clinic.
mmmm new pond. HAHA
but no fishes. too small i guess
sang woyaokuaile and it turned out all screwed
sang lu by fish, and it wasnt any better
no praises for me today ):
went to do some shopping after mc at town
no more GSS anymore. ):
