Hi! Thanks for the quick reply.
I have thought of using P(A)=1−P(A′). However, it is not as straightforward as it seems. What exactly is your A' over here? A would be the case of more incoming calls than outgoing calls AND a total of of at least 3 calls. What would be A'? The phrasing eludes me...
Hi. I normally can solve poisson distribution questions with ease. But this one question had me thinking for hours on end with no solution. It would be great if someone can help me.
QN:
The number of incoming calls per minute, X, to a telephone exchange has a Poisson distribution with mean 2...
Suppose the Ksp value of AgCl is 2 x 10^-10.
Lets say we have a saturated solution of AgCl, i.e concentration of Ag+ ions = concentration of Cl+ions = (2 x 10^-10)^0.5=1.41 x 10^-5
Ok so what i know is that if we add more Ag+ ions in the solution, precipitation of AgCl would occur since...
Ahh okay. I think i get it now after reading your post and thinking for so many hours.
Firstly, the formula intensity = power/area gives the power at a particular point. If we were to sum all the points ( surface area of a sphere), we would get the total power of the source, which is always...
Homework Statement
Suppose sound wave is emitted uniformly in all directions by a speaker.
At a distance of 1.1m, the amplitude of it sound is 1.2x10^-8m
What is the amplitude of sound at a distance of 1.7m?The Attempt at a Solution
What I'm confused is why does the amplitude of sound change...
Homework Statement
I have two questions. Both questions are in the picture below. Dont mind my workings lol
http://img163.imageshack.us/img163/5680/scanpic0001qe.jpg
Ans to the 1st qn: C
The potential difference across the 3ohm resistor is zero. Thus, it can be considered that the 4ohm and...
my take:
for a) the period won't change the period of pendulum = 2pi/w = 2pi(L/G)^0.5 so mass doesn't affect period of pendulum
b) yes use the formula
c) not sure
Use the formula x= (wavelength x D)/a where x is the fringe separation, D is the distance from the double slits to the screen and a is the separation of the two slits
fringe separation = 9/3 = 3mm
D = 0.8m
A = 0.12mm
convert all units to M. and you can find wavelength
u will get 4.5*10^-7m...
no but if u increase the supply voltage won't the voltage drop across the wires also increase? Like for example you increase the voltage of a battery the voltage drop across the resistor increases
Homework Statement
Ok so i was doing my revision for my exams and i was reading on transformers and they said that stepped-up Voltages and stepped-down currents minimizes for tranformers I^2R power losses in the transmission cable. I know that current is decreased, but a higher voltage, by...
Homework Statement
img341.imageshack.us/img341/1338/scanpic0001a.jpg
This is the picture. Sorry i can't add a link cause i do not have 10 posts.
The part that i don't understand is why the aluminium ring takes a longer time to fall when an alternating current is used
The Attempt at a...
oh one last question. If that's the case, then why do voltmeter measure the pd across the battery in this circuit?
http://img405.imageshack.us/img405/1755/84586970.png
Is the above circuit the same as this circuit?:
http://imageshack.us/photo/my-images/542/24112736.png/
If so then...