Mathematics - 11 October 2006

2006-10-11 04:10:20 · 7 answers · asked by Teresa A 1

Can anyone actually explain to me how this mathematics question was does as I had it in an engineering test but couldn't do it:
The power gain of an amplifier relates input power, Pi, to output power, Po, by;
Power gain= 10log(small 10) Po/Pi decibles (dB)
a) As part of the assesment of a new system you have been asked to find the power gain when Po=15W and Pi=300mW
B) you also have to find out what the output power will be if input power is 400mW and the power gain is 20dB.


Please may someone explain this to me step by step as it completely mindblows me, thanks to anyone who can help me it will be much appreciated.

Thanks everyone :)

2006-10-11 04:09:07 · 2 answers · asked by louie_ellis 1

Can anyone actually explain to me how this mathematics question was does as I had it in an engineering test but couldn't do it:
The power gain of an amplifier relates input power, Pi, to output power, Po, by;
Power gain= 10log(small 10) Po/Pi decibles (dB)
a) As part of the assesment of a new system you have been asked to find the power gain when Po=15W and Pi=300mW
B) you also have to find out what the output power will be if input power is 400mW and the power gain is 20dB.


Please may someone explain this to me step by step as it completely mindblows me, thanks to anyone who can help me it will be much appreciated.

Thanks everyone :)

2006-10-11 04:08:40 · 3 answers · asked by louie_ellis 1

Can anyone actually explain to me how this mathematics question was does as I had it in an engineering test but couldn't do it:
The power gain of an amplifier relates input power, Pi, to output power, Po, by;
Power gain= 10log(small 10) Po/Pi decibles (dB)
a) As part of the assesment of a new system you have been asked to find the power gain when Po=15W and Pi=300mW
B) you also have to find out what the output power will be if input power is 400mW and the power gain is 20dB.


Please may someone explain this to me step by step as it completely mindblows me, thanks to anyone who can help me it will be much appreciated.

Thanks everyone :)

2006-10-11 04:08:24 · 3 answers · asked by louie_ellis 1

a man has a stone weighing 40 kg.he has to divide it into 4 parts such that he can weigh any quantity from 1 to 40 kg by keeping a few or all of the stones on the balance only once(not by weighing two times). can u help himout??

2006-10-11 04:04:23 · 3 answers · asked by armor 1

2x + 5y = -30 and 3x – 4y = 1 can you show how u got the anwser so i can learn

2006-10-11 03:57:33 · 7 answers · asked by Anonymous

2006-10-11 03:53:37 · 3 answers · asked by Vacas Mugen 2

3x + y = -7 and -3x + 6y = 4

2006-10-11 03:49:27 · 7 answers · asked by Anonymous

The final velocity V is given by the equation:
i
V = V + at
. f .... i

Where V is the objects initial velocity
i
a, as it's accelleration
and t is the durationof the accelleration

a= ?

2006-10-11 03:45:08 · 6 answers · asked by SCHNITZEL 1

a tap drops water bubbles in same time intervals.when the bubble drop"B" drops from the tap ,bubble drop "A" 0.25m away from the tap(drops fall virticaly).count the distance of bubble "A"(from the tap) when the distance between "A" & "B" are 0.75m
g=10ms^-2

2006-10-11 03:44:09 · 2 answers · asked by Nethushanka 1

Solve by the substitution method. I know that the answer is (3,-2) but how do you get it??

2006-10-11 03:33:34 · 14 answers · asked by manda9287 1

a. radius
b. circumference
c. height
d. diameter

2006-10-11 03:08:30 · 7 answers · asked by Tony R 1

2006-10-11 03:04:51 · 8 answers · asked by Teresa A 1

I invent two formulae in calendar to find out any date from B.C. to A.D for any year (I able to tell any date with in one min upto one lakh years). So i would like to PhD in mathes of this subject. I am economically poor to study, so i want any instution to support me and to publish my calendar. Besides this I have the format of 700 years in a single page and easily understand by normal people.

2006-10-11 03:00:24 · 4 answers · asked by eswar rao 1

what is the best job hunting method - internet, cold call, company webpage, networking

2006-10-11 02:41:36 · 2 answers · asked by A D 1

name different types of statistics.

2006-10-11 02:30:46 · 5 answers · asked by Nikki 2

and finally divide it by the derivative of the slope of mt. everest with respect to its base.

2006-10-11 02:29:47 · 3 answers · asked by fujiko 1

The equation is shown with letters, each letter stands for a number. Try to solve this problem:

(k*(r+w+m)/t*a*(z-d-b+v))*(v*b*d*z*m*r*k*w)=k

Just try to solve the value of k.

2006-10-11 02:21:33 · 8 answers · asked by Anonymous

I thought that if you are adding interest to an amount continuously (every moment), it would definitely gain more than having the same amount being compounded only monthly or annually.
the equation for continuous compounding is S = Pe^(j-infinity*t)
S = future value
P = principal amount
e = natural log
j-infinity = force of interest (also denoted with delta)
t = time

2006-10-11 02:19:44 · 2 answers · asked by c377om377o 1

This is a stupid test to examine a specific feature on yahoo.

2006-10-11 02:17:40 · 19 answers · asked by Will M 2

2006-10-11 02:13:05 · 4 answers · asked by Anonymous

Can you show every step in your working please.

I know the answer (it's in the back of the book) but I can't quite get it!

2006-10-11 02:00:53 · 16 answers · asked by mr_sporty_spice 2

2006-10-11 01:30:33 · 4 answers · asked by Anonymous

I want a mathematical proof.....

2006-10-11 01:30:26 · 9 answers · asked by Red Falcon 1

i worked on this for over 2 hours now, plz help
suppose G is a group that has exactly 8 elements of order 3. how many subgroups of order 3 does G have?

2006-10-11 01:25:40 · 6 answers · asked by dsfdsfd f 1

2006-10-11 01:15:12 · 9 answers · asked by Kerri C 1

2006-10-11 01:02:26 · 10 answers · asked by pooh 1

2006-10-11 00:48:29 · 12 answers · asked by pooh 1

or is it a outstanding pleasure from which you can not stop thinking after a good deal of discoveries?

2006-10-11 00:40:59 · 10 answers · asked by AdrZZ 1

We all know the very famous Euler's Identity
e^iπ + 1 = 0

Now, we transpose 1
e^iπ = -1

We raise both sides to 2
e^2iπ = 1

Now, we raise both sides to the power 1/2iπ.
e^(2iπ/2iπ) =1^(1/2iπ)

Therefore,
e^1 = 1

And,
e = 1

Happy?
^_^

2006-10-11 00:11:36 · 9 answers · asked by kevin! 5