Science & Mathematics - 16 September 2007

i am having a problem....i'm having a right angles triangle in which i know all the three angles and the base....how can i find the hypotenuse? i have heard that that this is possible thorugh the law of sines...how? what is this law? and what are sines?can someone please guide me?

2007-09-16 23:52:01 · 9 answers · asked by suhas m 2 in Mathematics

If I' am given a dependent value and am asked to find it's corresponding independent value, how could I go about doing this (assuming I am given other ordered pairs as well)?

2007-09-16 23:51:55 · 1 answers · asked by Anonymous in Mathematics

Just wondering. Is high temp. a form of ionizing radiation? or non-ionizing radiation?

2007-09-16 23:51:44 · 3 answers · asked by Joey D 1 in Other - Science

The attractive force (F) between two objects varies directly as the product of their masses (M1 and M2) and inversely as the square of their distance (d) . If M1 and M2 are both halved and d is doubled , find the ratio of the new value of F to its original value .

2007-09-16 23:49:44 · 1 answers · asked by Anonymous in Mathematics

its for my GCSE at college

2007-09-16 23:49:24 · 23 answers · asked by Anonymous in Physics

2007-09-16 23:43:19 · 26 answers · asked by Anonymous in Geography

please specific colleges and courses would be very helpful. i'm look for courses teaching the arts of necromancy, voodoo, witchcraft, mythological creatures of past and present(i.e. zombies, weres, psi and sang vamps, fae, ect), and other things of that nature. any ideas guys?

2007-09-16 23:40:55 · 4 answers · asked by Anonymous in Paranormal Phenomena

Shrek have 2 spaceships. Ship "1" flying in a speed of 0.84c (c- speed of light). Ship "2" is faster than ship "1" (no one is actually flying in the speed of light).
Shrek also have 2 machines. A food machine (1) and a drink machine (2). He want to activate both the machines and that they will finish their work simultaneously and beside him.
The "normal" time it takes the food machine to work is 2.7hours , while the washing machine takes 3.28h.
(a)What Shrek need to do with himself and the machines ,so he could wait as little time as possible combine with the machines finishing their work simultaneously (meaning who will be on earth and who will be on the ships).
(b) how much time will pass on Shrek during the above events.
(c)Using Lorentz transformation, how much time it takes (from the view of the one who stayed on earth-Shrek, or one of the machines) the ships to turn around meaning stopping moving forward and starting heading back

2007-09-16 23:37:59 · 3 answers · asked by riverdancer 1 in Physics

what is the scientific name for the dust particles that moisture clings too, in a cloud to create rain.

2007-09-16 23:37:02 · 4 answers · asked by Anonymous in Weather

2007-09-16 23:27:36 · 8 answers · asked by nitish s 2 in Chemistry

i just want to know what is contained inside a rubella vaccine?
if possible, could u list them?

and does rubella contains substance from animal? such as pig?

2007-09-16 23:25:01 · 3 answers · asked by emmy_vanilla 2 in Medicine

2007-09-16 23:09:23 · 26 answers · asked by ishita 1 in Mathematics

2007-09-16 23:09:11 · 1 answers · asked by Blueshine R 1 in Geography

2007-09-16 23:06:45 · 4 answers · asked by 121><._}/? 1 in Mathematics

How do u work out the exact angles of these trigonometry questions? They are in my test 2mrw and i dnt know how to do it. Here are some practice questions i received from my teacher:
Find exact values of:
a) tan 60 degrees
b) cos (pi)/4
c) sin -45 degrees

and how do u solve these equations:

0 a) cos theta= -0.5
b)sin theta= -0.5

please show working out.

2007-09-16 22:57:28 · 7 answers · asked by Inhaler 4 in Mathematics

I am poor and can't really afford a computer. Just wondering if I need to have my own, when I get into medical school.

2007-09-16 22:56:13 · 6 answers · asked by Anonymous in Medicine

A triangle has sides of length x inches, x + 1 inches, and x + 2 inches and its perimeter is given by x + (x + 1) + (x + 2) = 42 inches.

2007-09-16 22:43:59 · 8 answers · asked by Vonnie 2 in Mathematics

1, List the prime number between 15 and 45?

2,What is the L.C.M of 4, 5 and 8?

3, What is the H.C.F of 24, 36 and 40?

2007-09-16 22:43:39 · 8 answers · asked by Ben 1 in Mathematics

2007-09-16 22:37:17 · 11 answers · asked by evening_go_jogging 2 in Astronomy & Space

I have heard that the US Military are tracking something in deep space that is travelling faster than anything previously seen and it is heading straight towards Earth. Apparently it is travelling so fast that when is does hit (estimated sometime next May) we won't even see it before it does. Has anyone else heard this?

2007-09-16 22:34:49 · 13 answers · asked by Alex 3 in Astronomy & Space

2007-09-16 22:19:28 · 13 answers · asked by Anonymous in Geography

L^(-1){1 / (s^(2) + s - 20)}

Thanks!

2007-09-16 22:15:10 · 1 answers · asked by Anonymous in Mathematics

Please help!!! All the problem says is: solve.

2007-09-16 22:14:37 · 10 answers · asked by Vonnie 2 in Mathematics

2007-09-16 22:12:40 · 3 answers · asked by Anonymous in Weather

2007-09-16 21:59:32 · 2 answers · asked by nea_m 1 in Medicine

2007-09-16 21:55:00 · 3 answers · asked by exo 7 in Geography

2007-09-16 21:53:07 · 3 answers · asked by Special J 2 in Weather

i am trying to use U-substitution.
but both of the following work:
u=tanx du=sec^2x
u=secx du=secxtanx

so i would have 2 different answers after pluging U back in....
which is correct?

thanks for answering

2007-09-16 21:48:46 · 4 answers · asked by thankyouforhelp 1 in Mathematics

2007-09-16 21:46:39 · 2 answers · asked by sandy 1 in Mathematics

2007-09-16 21:39:29 · 6 answers · asked by Robbie 2 in Medicine