Science & Mathematics - 20 November 2006

Can someone explain to me using information about mirrors and reflections why mirrors display words backwards.

2006-11-20 15:15:09 · 3 answers · asked by cult_king_666 1 in Physics

A 66.0 kg ice skater moving to the right with a velocity of 2.10 m/s throws a 0.19 kg snowball to the right with a velocity of 27.0 m/s relative to the ground.

(a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and the ice.
____m/s to the right

i think i'm supposed to use the conservaton of momentum which is m1v1i + m2v2i = m1v1f + m2v2f but i don't know which one is the v2i or v2f or v1i or v1f.

2006-11-20 15:15:01 · 2 answers · asked by tingerpoo 2 in Physics

2006-11-20 15:13:26 · 5 answers · asked by Anonymous in Mathematics

biological radiation

2006-11-20 15:13:21 · 3 answers · asked by Lanie 1 in Biology

can the EARTH be physically MOVED out of its current orbit to say, one between mars and jupiter, by MANKINDS efforts alone. IF SO, please state the method required.

2006-11-20 15:10:50 · 6 answers · asked by . S 3 in Physics

and if u could and if u understand this question: What data would you need to answer this question?(the 1 above) (like the mass, volume, density, r some other thin. (suppose 2 be inside the results in a data table r sometin))

2006-11-20 15:04:21 · 4 answers · asked by J 5 in Earth Sciences & Geology

please explain all steps to me..i know, it could be painful..
i must be skipping a step in my calculator
the whole thing is set = to 1 if that helps explain my dilemma here
thanks!!

2006-11-20 15:04:15 · 2 answers · asked by Anonymous in Mathematics

I wish to give a telescope as a gift. I would like to keep it under or up to $4,000. The main thing I want it to have is the ability to move with the earth so that you dont have to keep reajusting when viewing a distant planet (just knowing the name of this feature would help a lot too). Another nice feature would be able to auto locate certain plants or stars. I dont know much about telescopes, but the reciever of the gift has some expierence. But the more detailed you are the better. Thank you

2006-11-20 15:04:03 · 4 answers · asked by Anonymous in Astronomy & Space

I need help on how to solve these and show my work!

At Noon a horse and buggy headed north at 8 mph. two hours later the roadster headed south from the same location at 60 mph. At what time will the horse and buggy be 118 miles from the roadster?

2006-11-20 14:56:03 · 3 answers · asked by rivasamer 1 in Mathematics

because i have to find the diameter of some planets for sci. and i dont know if equatorial radius has anything to do with diameter...

2006-11-20 14:49:50 · 4 answers · asked by Anonymous in Astronomy & Space

How do I find the net ionic equation for the reaction of sodium phosphate with hydrochloric acid?

2006-11-20 14:49:45 · 1 answers · asked by nglennie_06 1 in Chemistry

please help..

2006-11-20 14:47:38 · 3 answers · asked by Serendipity 3 in Mathematics

ugh i hate math, but my teacher provided me with 4 right triangles 1 of them is a half of a square i just cant find the numbers of them i dont know how! cuz there was no number included with them. the next was like 1 hole square and half a 1 and another half of 1, HELP!

2006-11-20 14:42:48 · 8 answers · asked by Anonymous in Mathematics

How does the force with which you push your friend compare to the force with which your friend pushes you? How do your accelerations compare?

2006-11-20 14:42:22 · 1 answers · asked by Anonymous in Physics

2006-11-20 14:40:21 · 8 answers · asked by Rez 5 in Medicine

-7 0 0 3
-5 -5 0 0
0 -5 0 0
-9 -4 5 2

find the determinant of this matrix!
thank you!

2006-11-20 14:37:42 · 5 answers · asked by jose u 1 in Mathematics

2006-11-20 14:36:47 · 7 answers · asked by nike b 1 in Mathematics

why do you suppose there is such a great discrepancy between the accuracy of predicted masses for these two triads?

2006-11-20 14:35:44 · 1 answers · asked by Anonymous in Chemistry

2006-11-20 14:35:04 · 3 answers · asked by hidayani 1 in Biology

-------->what is a crystal?

2006-11-20 14:33:01 · 2 answers · asked by Anonymous in Chemistry

how to i find the length of the hyptotenuse of a right triangle

2006-11-20 14:32:26 · 18 answers · asked by Anonymous in Mathematics

Tell me what you think about that!

2006-11-20 14:28:46 · 18 answers · asked by Tyler1990Cali 2 in Astronomy & Space

His theory of relativity is:
D=R * T
Distance= Rate (times) Time

2006-11-20 14:28:02 · 4 answers · asked by Nick T 1 in Astronomy & Space

What if safety WAS guaranteed?

2006-11-20 14:27:21 · 5 answers · asked by attn deficiency. 3 in Astronomy & Space

2006-11-20 14:26:34 · 5 answers · asked by Uperson 2 in Weather

why was mendeleev's decision to leave blank spaces on his table sometimes referred to as his most significant contribution to the periodic table?

2006-11-20 14:26:32 · 2 answers · asked by Noor 3 in Chemistry

2006-11-20 14:24:58 · 10 answers · asked by Anonymous in Physics

2006-11-20 14:24:00 · 5 answers · asked by Anonymous in Astronomy & Space

???

2006-11-20 14:23:44 · 7 answers · asked by bonitpitta 1 in Mathematics

Triangle ABC is isosceles with line AC=line BC. Line AC = 6, line BC= 2x+2, line AB=x+1. Solve for x
6
-1
2
5
thanks!!!!!!!!

2006-11-20 14:23:43 · 10 answers · asked by hehe 1 in Mathematics