Base Definition and 586 Threads

Please justify this phenomenon: In an active mode for a transistor, ideally it is assumed that collector current is independent of the base collector reverse bias, whereas, the collector is slightly dependent on the base collector voltage. Thanks ~Eternallove

if we treat acetaldehyde with dilute base which out of the following two will be the major product: a}acetic acid b}alpha hydroxy butanal Ofcourse anyone would think of an aldol product which would be [B]beta hydroxy butanal[/B],but that is not given here,isn't there a slight chance that...

In DNA, the two purines are Adenine and Guanine and the two pyrimidines are Thymine and Cytosine. NOw...in DNA...Adenine pairs with Thymine and Guanine pairs with Cytosine. A purine pairs with a pyrimidine. That explains why Adenine cannot pair with Guanine and why Thymine cannot pair with...

When I look at a map which shows the sea floors I see canons at the base of large rivers which tend to fork out and travel long across the ocean floor. It looks very much like they were carved by the river. What are these and what caused them?

Base 10 Anomaly An applied 49-year study into the origin of pi and the Base 10 number system resulted in the finding of a highly anomalous formula. Essentially, the finding derives from the perfect ratios (0:1:1:2:3:4) given by Pythagoras who we know studied and perhaps taught in the...

Hi. Part of my homework was to work out what the SI base units of the gravitaional constant are. I'm crap at working out base units so could somebody help me out? Thanks If anyones wondering, G is 6.67 x 10ˉ¹¹ N m² kgˉ²

I've never really used Mathematica before so I'm rather confused by it, how would I say convert a number, 23a94b13 to base 10?

The base of a certain solid is the triangle with vertices at (-8,4) ,(4,4), and the origin. Cross-sections perpendicular to the y-axis are squares. Then the volume of the solid is __________ i have no clue or don't even know how to start this problem. Well the first thing i did was just...

Hi, I've a riddle that I can't solve. I hope someone can help me in it. Here is it: If we have a number and add the digits of that number, then subtract the summation we got from the original number, why is the result always multiples of the base system minus 1. Here is an example...

Hi, I just began working on a little program to convert base 10 number to Roman numerals. I couldn't figure out how to make a loop to count how many Ms, Ds, Cs etc. so I wrote it out the long way for now. I can see a lot a repetition and an obvious pattern in my divisors, since I am dividing...

Hiya, Im trying to determine the initial molarity of an unknown acid, sooo I am trying to titrate it with standardized sodium hydroxide solution (0.1M). But I am having a load of problems figuring out what the heck I am supposed to do since i am told the acid is a weak acid. If I am...

Hi all, I don't know how to solve this: The vector u has the coordinates ( u_1, u_2, u_3 ) to the base a = { ( 1,0,0), (1,1,0), (1,1,1) } and it has the coordinates ( u^{'}_{1}, u^{'}_{2}, u^{'}_{3} ) to the base b. We also know: u_1 = 2u^{'}_1 - u^{'}_2 + u^{'}_3 u_2 = u^{'}_1...

pH help?? This is the question i need help in: A 0.200 M solution of a weak base in water has a pH=10.40. Calculate the value of kb for this base. I know the answer but i need help on how to get that answer. Thanks

I don't have the answers in the back of my book and I really want to know if i did this correctly since its graded. the Problem is: Let the region bounded by x^2+y^2=9 be the base of a solid. Find the Volume if cross sections taken perpendicular to the base are isosceles right triangles. i...

Here's the question: ---------- A base stock solution is prepared by dissolving both 1 gram of sodium hydroxide and 2 grams of potassium hydroxide in enough water to prepare 100 mL of solution. How many millimeters of this base stock solution are required to neutralize 100 mL of 0.50 M...

CH3OOH (aq) + NH3 (aq) ‹———› NH4+ (aq) + CH3COO- (aq) Would the above reaction, involving acetic acid and ammonia qualify as a proper neurtalization reaction involving a weak acid and weak base? Or, would a reaction involving acetic acid and sodium bicarbonate be better? Regards

We conducted a lab on Friday and today we have to answer a few post lab questions. I'm stuck on one question and it asks: Does sodium bicarbonate (aka Baking Soda) (NaHCO3) function as an acid or a base? What sort of condition will determine this? I know that sodium bicarbonate will...

i don't understand how to find the exact answer to log base 4 64 without using a calculator. can anyone help?my teacher gave examples but they are on bad photocopies sarah

A man of mass 83.8 kg stands on top of a uniform ladder whose mass is 11 kg and whose length is 8.7 meters. Find the distance (in meters) from the base of the ladder to the center of mass. Here's what I did: X(center of mass) = (83.8*8.7) + (11*0) / (83.8+11) = 7.69meters but the...

Hi. I need to find a base for the subspace V in R3 which has the equation x+2y+3z=0 Can someone please tell my if the space I'm looking for is [1 0 0;0 2 0;0 0 3] ? If not, please explain what I'm doing wrong

consider the titration of 50.0mL of 0.10 M methyl ammonia with 0.10 M HCl. Calculate the pH after 15mL of titrant= 11.05 25mL of titrant= 10.68 50mL of titrant= 8.98 60mL of titrant= ? At 60 mL there is an excess of 1 mmol of HCl. At this point do I say that the pH is 1 (-log of 0.10)...

I feel like an idiot asking this in a chemistry forum, but I have looked everywhere. I don't understand what acid and bases are, and how they work. I understand chemical bonding down to quantum physics, but I just don't understand this, what is happening in an acid?

acid or base? please help hi during a science lab we tesed various unknown substances to classify them as either acid or base. Some of the indicators that were used was: bromthymol blue, blue/red litmus paper, phenophthalein . One of the substances was acid according to 2...

Or the ping from a triangle the opposite side of the globe, lost in the back ground noise, some things may exist, but remain forever hidden to our detectors, if so how could they be of use to us? Can energy be dark, can matter hide from us, are we just the puff of smoke left over from the...

The problem is a follows 142 alpha 214 = 331 and 431 beta 123 = 303 where alpha and beta are unknow operators I am pretty sure they are +,-,*,/ I know the radix (base) must be 5 or higher because 4 is present By assuming the base to be 5 and converting to decimal, I...

I am a member of the Dozenal Society of Great Britain ( [PLAIN]www.dsgb.orbix.co.uk[/URL] ) . We maintain that base twelve is better than ten, and, in our own small way, try to examine and explore this point. Anyway, my point is I was wondering if anyone had any interesting thoughts or ideas...

i am curious as to how this would look. i wonder how the addition tables would look in base -5? would the multiplication look the same? here is what i know so far: addition multiplication 0 1 2 3 4...

Hello I really need help for working out the concentration of an acid / base. 1) How can we use a simple thermochemistry measurement and a density measurement, to find the concentration of an acid or alkali? (other than titration) 2) How do you devise an experiment to estimate the...

I have several questions. 1.)Supose [H+] is 100 times less than the ka for an acidic acid-base indicator (see Eq.2), and enough acid is added to the the solution to raise [H+] by a factor of 10,000. What value did the ration of the different colored forms of the indicator, [ln-]/[H ln], have...

Why is 10 a base number? Why not 4? Is it because we can count to 10 on our fingers? This sounds like a stupid question I know but it's been bugging me.

The emitter current in a certian npn transitor is 8 mA. If .8% of the minority carrier injected into the base recombing with the holes, find the base current , collector current and the exact value of alpha i am not sure how to get this started thanks joe

im sick of logs use base and index steps to show the answer to 37 x 0.785 using logarithms with a base of 10, e and 5. i just want to know how to start this problem. thanks in advance

I've got a friend who lives on a military base. The base has a firewall that blocks out a ton of stuff and such so I was wondering if anyone knew something that could bypass this firewall. I remeber someone had http tunnel client a while back and that worked but you have to pay for that.

The base of a solid is a circle of radius a, and its vertical cross sections are equilateral triangles. Find the radius of the circle if the volume of the solid is 10 cubic meters. Eq. Triangle: A = [sqrt(3)/4]s^2 V = [sqrt(3)/4]*Integral{-a to a} 4(a^2 - x^2) dx V = 2*...

in our everyday life, for as long as i know we have been using base 10. why not base 9? base 8? base 16? base 50? is it because we have 10 fingers (which is how our ancestors counted, and thus maybe made the base10 system we are so accustomed to)?

432432 base 5 = ____ base 10?