alright, you have 2 pieces of rope, you know that each rope takes an hour to burn
they are not at all uniform (ie. can be fat at one end and skinny at another)
that is, burning a rope 1/4 of its length does not take 15 minutes
how would you measure 45 minutes exactly??
Let
a=b
multiply both sides by b
ab = b^2
minus a^2 from both sides
ab-a^2 = b^2 - a^2
factorise
a(b-a) = (b-a)(b+a)
divide both sides by (b-a)
a= b+a
BUT a=b
a = 2a
divide through by a
1 = 2
i had to do C programming at Uni this session
and i have to say programming is so stoopid/hard/boring
does anyone hear actually like programming or is good at it?
I was just wondering why Design and Technology students like us have to work our asses off all year making major design projects while still trying to study, why this subject is so poorly ranked.?
i am possessed. seriously i am that damn good at any computer game. it started at an early age when i finished alex the kidd on sega when i was about 4, from then on ive always been a computer game master. i wish they had a big competition or something, or there was a way to get payed for...
A small amount of pure sodium metal is dropped into 1.2L of water. The reaction is summarised in the following equation.
2 Na(s) +2 H2O(l) ---> 2 NaOH(aq) + H2(g)
The gas collected occupied a volume of 4.68L at 25 degrees celcius and 1 atm. pressure
a) Calculate the amount in moles of...
Q. A student placed a 0.5g strip of magnesium ribbon in 100mL of
(i) 0.10 mol/L ethanoic acid
(ii) 0.10 mol/L sulfuric acid
Compare the chemistry of the above two reactions in terms of the strength of the acid, rate of reaction and volume of gas formed. Use equations in your answer
???
1)explain why the hydrogen spectrum contains many lines when a hydrogen atom only contains one electron?
2) The ground state potential of the hyrogen atom is -13.6 eV. A photon of energy 14.6 eV collides with an elecron in the ground state of a hydrogen atom. What will be the energy of the...
do we have to know all the types of quarks and leptons, their symbols and their charges??
Also in this years Newington trial there was this question in quanta to quarks and i'm not sure how its done..
Q.An electric field is applied to a sample of hydrogen to stimulate the Balmer transition...
from a pack of nine cards numbered 1,2,3,......,9 , three cards are drawn at random and laid on a table from left to right
1) what is the probability that the number formed exceeds 400?
11) what is the probability that the digits are drawn in descending order??
1) How many different six letter words can be formed from the letters of the word AUSTRALIA ??
2) How many different sums of money can be made up from six $20 notes, two $5 notes, four $2 coins, seven $1 coins, three 50c coins, and one 20c coin ??