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Clearly all real numbers. this includes +- infinite not just the positive side.

When copying DNA, mRNA codes T as U am i correct? Question: During DNA transcription a complementary molecule of mRNA will be produced. Draw the base sequence that would be produced if the base sequence A T T G C T were the template. Answer : U A A C G A It should be T U U C G U right...

Future IT man :) They need super staring abilities without blinking you know. Thats why they stare at the comp all day, its for training :P

tan (x+y) + tan (x-y) / 1- tan (x+y) tan (x-y) = tan [(x+y) + (x-y)] , using tan (A+B) = tanA + tanB / 1-tanAtanB = tan (2x)

a ball is thrown with initial velo 20m/s at an angle of elevation arc tan (4/3) Suppose that the ball is thrown up a road inclined at arc tan (1/5) to the horizontal. Show that: The time of flight is 2.72 secs, and find the distance the has been thrown up the road. Additional info you might...

Re: another question check : x = 3 + sin4t + root3 cos4t express in x = x0 + asin(4t+A) ans should be x = 3 + 2sin(4t+pi/6) am i correct

partial fractions: 1 / v(1+v) = [av+b / v^2+1] + [c/ v] 1 = v(av+b) + c(1+v^2) when v =0, 1 get your terms equation coefficients of x^2, then simultaneous with previous equation you then get c= 1, a= -1, b= 0

i need to confirm something prove that v^2 = n^2 (a^2 - x^2) x.. = -n^2x 1/2 v^2 = -(n^2 x^2)/ 2 + C/2 v^2 = -(n^2. x^2) + C when v = 0, x=a therefore C = n^2 . a^2 v^2 = -(n^2x . x^2) + n^2 . a^2 hence v^2 = n^2 (a^2 - x^2) is this proof correct? and do you have derive each time...

got it now thx kcqn a>0, since a is amp :)

bump damn forgot to ask teacher agn

A particle is moving with SHM of period pi seconds and max velo 8m/s. If the particle started from x = a, find a , then find the velo when the particle is distant 3m from the mean position. x.. = -n^2x or x.. = -n^2(x-x0) damn i fail at this topic :haha:

TSS: Secchi disk(just use object) is lowered into the water until it can no longer be seen; the depth is then recorded as a measure of the transparency of the water (inversely related to turbidity). But since your water is clear, you'd need some long ass tube so im not really sure. or you could...

yep ok me :) even though i can borrow a book from library are these 'special' questions or just the ordinary

ahh ok ty

is the x in that formula x..?? and it says the resultant formula should be derived by integration each time, and not quoted, you can do the honours :P

The amplitude of a particle moving in shm is 5m, and its acceleration when 2m from its mean position is 4m/s^2. Find the speed of the particle at the mean position and when it is 4m from the mean position. answer 5root2 m/s, 3 root2 m/s (how do you get this..) i did : x=a sin(nt+A) => when x...

i think so 210 mg/ 1000 mL : c2 / 100mL c2 = 21 ppm i just put it in ratios, cos c1v1 = c2v2 will change the value something seems wrong, may someone clarify please

<DIR>an environmental chemist tests a water sample and find it contains 210 ppm of nitrate ions. He takes 10mL of solution and adds 90mL of distilled water to it. What is the conc. of nitrate ions in this 100mL solution? Justify your choice </DIR>

ty got it

the velo of a particle is proportional to its displacement. When t = 0 , x=2, and t = 10, x = 4. Find the displacement- time function, and find the displacement when t = 25. i dont understand the part in bold i interpreted it as v = x? dx /dt = x??