Science & Mathematics - 23 October 2006

a soccer player has kicked in his last seven games, the following number of goals. 4, 12, 6, 10, 11, 8 and 6..
how many foals does he need to kick in the next game for a mean of 8?

2006-10-23 20:09:36 · 8 answers · asked by Anonymous in Mathematics

In your pocket you have £10.48. It is made up of four different denominations of coins. There are exactly the same number of each coin and the largest denomination is £1. How many of each coin is there are what are their respective values?

2006-10-23 20:07:01 · 2 answers · asked by Giridhar V 1 in Mathematics

2006-10-23 20:03:28 · 4 answers · asked by Anonymous in Physics

2006-10-23 20:02:54 · 16 answers · asked by Anonymous in Geography

for basic medical examination in tropical developing countries
-haemoglobin estiamiton
-urine protein estimation
-RBC count

2006-10-23 19:59:16 · 1 answers · asked by elle 2 in Medicine

Two blocks (A and B) are tied together and are being pulled along horizontally by a rope attached to Block A with a force of 84N. Block A is 35kg with a coeifficient of friction of .02. Block B is 16kg with a coefficient of friction of .03. Find the following.

What is the accelration of either block?
What is the net Force on Block A?
What is the Tension on the rope between the two blocks?

16kg T=? 35kg
[B]----------------[A]------- > 84N
u=.03 u=.02

2006-10-23 19:58:35 · 3 answers · asked by Anonymous in Physics

what is the limit of sin (1/x) as x approaches infinity?
is it infinity or is it zero?

what is the limit of 2cos(2x) as x approaches infinity?
is it infinity or zero?

please explain this..thanks

2006-10-23 19:56:19 · 6 answers · asked by ? 1 in Mathematics

Our physics teacher told us to build something that uses lenses. What projects can you suggest? It would be pretty nifty nice if you can show me blueprints... hehe.... that ends my question... xiao..

2006-10-23 19:48:49 · 4 answers · asked by terabyte 1 in Physics

I have few ideas such as using several large fountains in series that shoot sea water into the air hundereds of meters to cool the surrounding area. This may effect the dessert climate in a way that it may start to eventually cool the atmosphere and bring in cool air currents. The fountains would take seawater from the nearby seas that surround a particular country and by using gas turbine pumps send the water high into the atmosphere. There would be a byproduct of this process in that it will create seawater lakes that may also contribute to cooling the local area.

Also, as the water falls it will draw in cooler upper atmoshpere air similar to what happens in rain squals when wind is generated by the falling rain drops.

2006-10-23 19:45:58 · 8 answers · asked by Anonymous in Weather

Consider an acid, HA, with pKa = 5.883. 0.19 moles of hydroxide ion are added to 61.99mL of a 0.412M solution of the acid. What is the resulting pH?

Answer is 3.758. Thanks for your help.......(by the way, I have a test on Wednesday so yeah.........lol)

2006-10-23 19:36:16 · 3 answers · asked by Anonymous in Chemistry

2006-10-23 19:34:27 · 4 answers · asked by Anonymous in Engineering

I'm now want to design an amplifier which is 2.1 channel.
Now my problem is to design the low pass fillter for the woofer.
Then i have to limit the frequency at the level of 300Hz is it too low to produce a best quality of bass?
To make this type of filter should it use a Op Am?

2006-10-23 19:34:00 · 4 answers · asked by coereo 1 in Engineering

a.always remains greater inside a membrane.
b.eventually becomes balanced on both sides of a membrane.
c.always remains greater on the outside of a membrane.
d.becomes imbalanced on both sides of a membrane.

2006-10-23 19:33:09 · 5 answers · asked by ? 3 in Biology

small amounts will precipitate. Why?

2006-10-23 19:30:30 · 2 answers · asked by AREVIK N 1 in Chemistry

2006-10-23 19:23:07 · 4 answers · asked by dizzyandconfused 2 in Physics

Can you please state your view, tell your discipline and give some details of your academic record?

2006-10-23 19:19:36 · 4 answers · asked by Anonymous in Other - Science

Use 12.01 amu for the atomic mass of C, 1.008 amu for H and 16 amu for O.
I know that the answer is 219g, i just dont know how to get it?

2006-10-23 19:12:53 · 7 answers · asked by tx_guy505 1 in Chemistry

This concerns cellular filaments. During research experiments, they often stain for vim and beta-gal at the same time. Why, what is the basis of this, is my question.

2006-10-23 19:11:00 · 1 answers · asked by pw12321 1 in Biology

2006-10-23 19:09:01 · 2 answers · asked by deepjit r 1 in Engineering

You know how the heart is a sign for love? Well what is the sign for hate.

2006-10-23 19:07:41 · 10 answers · asked by Darkangel10x 1 in Other - Science

I just need to know this. Yes 20 most recent earthquakes, 20 most recent tsuamis...

2006-10-23 19:06:47 · 3 answers · asked by adrianchemistry 2 in Earth Sciences & Geology

More importantly, can you count on both hands and count to 1024?

2006-10-23 19:04:13 · 8 answers · asked by supensa 6 in Mathematics

2006-10-23 19:02:56 · 13 answers · asked by Anonymous in Earth Sciences & Geology

Let V be the complex inner product space consisting of all continuous funtion on [-pi,pi] with the inner product defined as
=the integral from -pi to pi of f times g

Now I know that it is easy to prove that the set of functions {sin(x), cos(x), sin(2x), cos(2x), ,,,} for all n natural is orthogonal because it is easy to show that the inner product
= 0 for all m,n natural numbers
= = 0 if m doesn't equal n

My question is that is this not also true for all m,n where m doesn't equal n. Why does this only work when m,n are restricted to natural numbers?

I have seen and done the proof (while trying to work with Fourier Series) and it seems to me that it should for for ALL m and n instead of just natural number.

2006-10-23 19:00:01 · 2 answers · asked by The Prince 6 in Mathematics

2006-10-23 18:53:54 · 2 answers · asked by julia t 1 in Mathematics

A.selective transport.
B.cell surface markers.
C.chromosomes.
D.the type of invading bacteria.

2006-10-23 18:53:32 · 5 answers · asked by ? 3 in Biology

2006-10-23 18:52:15 · 2 answers · asked by julia t 1 in Mathematics

How do you solve this using the L'Hopital's Rule?
1. the limit of cotx/ln x as x approaches zero from the right side (0+)
2. the limit of cos((1/t))^2 as t approaches infinity


and as addition, what is the limit of
x + sin(2x) as x approaches infinity?

thanks all

2006-10-23 18:51:39 · 4 answers · asked by ? 1 in Mathematics

The earth behaves like a magnet and the shape of the earth's magnetic field resembles that of a Bar magnet of length 1/5th of the earth's diameter,buried at its centre.
What is the role of this Magnet?has it got something to do with gravity?

2006-10-23 18:47:34 · 8 answers · asked by shreenidhi 1 in Physics

a.chlorophyll
b.carotenoids
c.carbon dioxide
d.water

2006-10-23 18:41:22 · 11 answers · asked by ? 3 in Biology