Science & Mathematics - 5 October 2006

If a hamburger costs 30 cents more than a hot dog and 20 cents less than a cheeseburger, and 3 hamburgers cost 75 cents less than 2 hamburgers and 2 cheeseburgers. How much does the hamburger cost?

2006-10-05 18:44:33 · 9 answers · asked by Leanne C 1 in Mathematics

It seems this was not caused by fire but deomlition.

2006-10-05 18:37:40 · 13 answers · asked by Luke F 3 in Physics

What kind of jobs (technical) can be expected in the near future in the field of Nanotechnology? Also, how fast is it growing to be influential in our day 2 day lives?

2006-10-05 18:36:59 · 3 answers · asked by Sana 2 in Physics

2006-10-05 18:33:55 · 11 answers · asked by Anonymous in Astronomy & Space

when a question pops up asking me 'what is the variable in this experiment' what does that actually mean, what kind of answer am i supposeto write there.Obviously you can't see the experiment itself that the questions for but i just want the basic meaning of the question...thanks heaps!! =)

2006-10-05 18:32:36 · 3 answers · asked by Anonymous in Biology

2006-10-05 18:30:18 · 7 answers · asked by Anonymous in Earth Sciences & Geology

Let U and V be subspaces of a vector space W. Prove that their intersection U (intersection) V is also a subspace of W.

I don't understand. If U lies in W, how could the intersection EVER be outside of W?

2006-10-05 18:27:32 · 2 answers · asked by Sean H 2 in Mathematics

2006-10-05 18:26:49 · 6 answers · asked by Anonymous in Earth Sciences & Geology

HELP!!! I'm measuring the rate of transpiration of a leafy shoot every 30 mins and there are two sets of conditions, Condition A and Condition B. The following are the results:-

30mins - A 3mm, B 1mm
60mins - A 6mm, B 2mm
90mins - A 9mm, B 4mm
120mins - A 14mm, B 3mm
150mins - A 17mm, B 3mm
180mins - A 23mm, B 3mm

From these results what would you expect Conditions A to be like (in terms of light intensity, humidity, wind movement)?. Explain why you think so.

I hope someone can help with this, thank you soooo much!! =)

2006-10-05 18:24:01 · 3 answers · asked by Anonymous in Biology

2006-10-05 18:19:32 · 5 answers · asked by Nikhet.F 1 in Mathematics

round the curve without skidding. The radius of the curve is 160 m. At what angle with respect to the horizontal must the curve be banked? Answer should be in degrees.

2006-10-05 18:19:09 · 3 answers · asked by Anonymous in Physics

2006-10-05 18:16:02 · 6 answers · asked by Anonymous in Physics

I'm looking for a way to cover a giant sphere with cloth. My problem is that you can't just wrap the cloth aroung the sphere...because it will wrinkle uncontrollably. How can I make the cloth lay flat? I assume it means making many separate cuts that fit together in the shape of a sphere...but I can't figure it out yet. Please help!

2006-10-05 18:13:36 · 5 answers · asked by MattMan 3 in Engineering

What intrigues me is how we can fashion microprocessors from stone tools. There is a progression. Stone tools led to copper tools, which led to bronze and iron and parts of increasing refinement. I don't understand how crudity can lead to sophistication. What is the missing ingredient?

2006-10-05 18:10:31 · 7 answers · asked by Gibaudrac D 2 in Engineering

Can the male's nipples produce milk???

2006-10-05 18:07:53 · 10 answers · asked by the redcuber 6 in Biology

QUESTION:
"A winch at the top of a 12-meter building pulls a pipe of the same length to a vertical position. The winch pulls the rope in at a rate of -0.2 meters per second. Find the rate of vertical and the rate of horizontal change at the end of the pipe when y=6"

Please show me how to do this. Thank you.

2006-10-05 18:05:05 · 1 answers · asked by Elk n' Fresh 4 in Mathematics

If I have a two-dimensional matrix, such that I know the sums of the rows and the columns, and that all the elements are in the set of integers [1..9], is there a simple way, other than guess-and-test, to determine each element? Let me set it up:

[a b]
[c d]

a + b = w, c + d = x, a + c = y, and b + d = z. a <> b, c <> d,
a <> c, and b <> d. If I know w, x, y, and z, how do I find a, b, c, and d?

And...go!

2006-10-05 18:03:18 · 2 answers · asked by supensa 6 in Mathematics

http://www.carm.org/evolution.htm

2006-10-05 18:01:47 · 8 answers · asked by chained6002 1 in Biology

also dinosaurs went extinct at the end of the cretaceous period. would they have witnessed the formation of the himalayals? Why or why not? and how long were dinosaurs around? (I know I ask alot but please answer every part of the Question as much as possible)

2006-10-05 17:58:14 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Show: Q[sqrt(3)] is a subfield of R (the real numbers).
I know to show this, the following must be true:
1) a + b is an element of Q
2) (a)(b) is an element of Q
3) Of is an element of Q
4) a + x = 0f has a solution in Q
5) 1f is an element of Q
6) if a is an element of Q and a is not equal to 0f, then the solution of (a)(x) =1f is in Q

I'm not really sure how to show any of these, so any help would be greatly appreciated! Thanks!

2006-10-05 17:52:32 · 3 answers · asked by jjodom1010 3 in Mathematics

I want to improve the lives of all humanity. What is my next step and beyond.

2006-10-05 17:51:42 · 8 answers · asked by brokolay 3 in Engineering

i think the answer is one but i dont know how to get it....thanks

2006-10-05 17:51:22 · 6 answers · asked by ice_cream_chico11 1 in Mathematics

2006-10-05 17:48:52 · 6 answers · asked by zaffar Mahdi 1 in Botany

Simple question, hard answer. Where is it placed. Possibly it is not there until birth, or is taught in upbringing. Upbringing is DEFINATELY ruled out from studying bastardized animals. What part of the biological process holds this information.

Additional Details

4 days ago
Is instinct programmed into the lifecycle of a person from repetitive training, to be passed on to the children?????

3 days ago
One last question, if instinct is inheritent-ly created and passed on from so called "lifetime experiences;" does it or will it dissolve with certain variables such as no more need for this instinct? (This means all progenies are from the same species, race, culture, etc, with no need to adhere to this instinctive nature anymore.)

2006-10-05 17:47:01 · 4 answers · asked by careercollegestudent69 4 in Biology

http://www.gennet.org/facts/nessie.html

2006-10-05 17:44:17 · 9 answers · asked by chained6002 1 in Biology

this is how the experiment went: We first did an experiment proving Boyle’s law. 1) We got a meter stick with plastic tube tied to the stick with rubber bands and a stopper. 2) We recorded the atm in the lab room. 3) With the stopper removed we pored 1 cm of water in the tube so it was even on both sides of the tube. 4) We put the stopper on one side of the tubing. 5) We measure the level of the water on the side with the stopper, and the height of the whole side of the tube with the stopper. We did this in order to get the height of trapped air. 6) We recorded this volume in our lab book. We then recorded the level of the water on the open side of the tube. 7) we then added 10cm of water to the tube and recorded the value and did this until we reached the top of the tube.

2006-10-05 17:43:41 · 2 answers · asked by hockeyislife21 1 in Chemistry

WANNA BE IN NASA SOME DAY.

2006-10-05 17:42:48 · 9 answers · asked by addy 1 in Astronomy & Space

please give me some reliable website about transistors and thyristors

2006-10-05 17:42:42 · 4 answers · asked by perry 1 in Engineering

2006-10-05 17:40:01 · 8 answers · asked by ddelga2005 1 in Chemistry

2006-10-05 17:32:42 · 3 answers · asked by SmoOth 1 in Chemistry