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Yuni
Questions (19)
Salt dissolving in water is an example of a chemical change
1 answer
249 views
what should i labeled on giant chromosome slide?
-things that should have on that chromosome.
0 answers
313 views
the common metallic elements have been invetigated for their relative reactivities and have been arranged into what is called
1 answer
394 views
does the voltaic cell(in exp) must be the same with the standard cell that we calculated based on the formula?
0 answers
335 views
The reaction AB(aq)->A(g)+ B(g)is second order in AB and has a rate constant of 0.0282 M^{-1} s^{-1} at 25 Celsius. A reaction
2 answers
2,028 views
are blood pressures have differences between genders?explain your answer.
-from what i know, women have lower risk to get high
2 answers
611 views
potential difference=40v b2n plate A & B.
find work done if q=+3C from a) B to A b) A to B *i already know the ans but i need the
3 answers
437 views
if a & b are perpendicular vectors, show that
a)(a+2b).(a-b)=|a|^2-2|b|^2 b)(a+b).(a-b)=|a|^2+|b|^2 *how to show it?just multiply
2 answers
607 views
prove cos(x+y) / cos(x-y) = (1-tan x tan y)/(1+tan x tan y)
1 answer
690 views
rate=k[A2][B2]^2.
by how much would the rate change if: i) [A2] is doubled? ii) [B2] is halved? *does the rate change equal with
2 answers
392 views
the atom of element A has 2 electrons in its highest energy level N.
a)what is the special name given to elements in the same gp
1 answer
492 views
150 cm3 0.24 M naoh solution react with excess al(no3)3, calculate the mass of saodium aluminate produced.
al(no3)3 + 4naoh ->
1 answer
414 views
how to know from the experiment if the oxygen produced as a result of carbon fixation or electron transport?
my experiment result
1 answer
1,027 views
-rate of photosyhthesis in presence of light intensity & CO2.
~A : sodium bicarbonate in darkness pH b4 xperiment-9 " @ 20 min- 8
0 answers
508 views
what is the original color of Phenolphthalein solution? pink or colourless?
1 answer
982 views
A piece of wire of length 240 cm is bent into the shape of trapezium where the eqtn is = 13x+13x+y+y+24x. Find the value of x
1 answer
957 views
the volume of an cylindrical can with a radius r cm and height h cm is 128000 c^3, show that the surface area of the can is
1 answer
602 views
a liquid form of penicillin is sold in bulk at a price of $ 200 per unit.If the total cost for x unit is
2 answers
1,318 views
if i get 4 % of yield in the experiment of chemical reactions of copper and percent yield. Is there a possibility the experiment
0 answers
456 views
Answers (5)
is the answer 1392 s?
thanks
i'm sorry. the electric field are from A to B. dear drwls,you didn't answer my question. i know about the concept but why the v is negative? or how can it be proven mathematically by the formula?.
im sorry but b4 this i already seacrh at the internet but i didn't found what i want. so i hope there will be another answer coming on.
can any1 plz answer this question.
