Science & Mathematics - 9 October 2007

2007-10-09 11:12:34 · 9 answers · asked by SAS wildcat cheerleader(: 3 in Mathematics

What is the answer to........8 radical 5 - 10 radical (1/5)

2007-10-09 11:12:28 · 3 answers · asked by baseballman1243 1 in Mathematics

This is for a science project :)

2007-10-09 11:06:07 · 8 answers · asked by Anonymous in Chemistry

I'm building a radio for my science fair project but i'm not sure what to test about it. i was thinking about the wave interference, but not sure... Any ideas and details on execution of em? (oh, and the radio's bn made out of an oatmeal box^_^)
thanks in advance! ^_^

2007-10-09 11:05:19 · 3 answers · asked by Anonymous in Other - Science

May and Richard are throwing a Frisbee at the beach. When May throws to Richard, the height, in metres, of the Frisbee above the sand after t seconds is described by the function
h(t) = -2t²+3t+1.

a.) Find the avg. velocity of the Frisbee for the time period beginning when t=1 and lasting
i.) 1 s ii.) 0.5 s

b.) Find the instantaneous velocity of the Frisbee when t=1

2007-10-09 11:04:57 · 3 answers · asked by Anonymous in Mathematics

Well, I know that there's 21, but that's about it. Please help me out!!

2007-10-09 11:03:52 · 2 answers · asked by basketcait 2 in Weather

2007-10-09 11:03:20 · 4 answers · asked by Integer 1 in Mathematics

I mean, I have a earthlike beachball, and even I can see that Australia is on the bottom. Do they have to hang on to vines all day to keep from falling off the earth?

2007-10-09 11:03:11 · 21 answers · asked by Anonymous in Earth Sciences & Geology

i'm talking about air guns, and rounds that don't connect with a person or a building. do they come back down to earth?

i know this probably has a really simple answer but i am very confused. have watched cop shows there they shoot into the air. and i was thinking... why doesn't the bullet come down. and managed to confuse myself

2007-10-09 11:01:35 · 34 answers · asked by maraesa1000 5 in Physics

2007-10-09 10:57:44 · 10 answers · asked by LilyDragon 3 in Geography

2007-10-09 10:56:51 · 6 answers · asked by queen b 1 in Astronomy & Space

My problem is as follows: A sled is dragged along a horizontal path at a constant speed of 1.5 m/s by a rope that is inclined at an angle of 30.0° with respect to the horizontal (the figure below). The total weight of the sled is 470 N. The tension in the rope is 270 N. How much work is done by the rope on the sled in a time interval of 10.0 s? What equation would i use to figure this out? I cant seem to find one that also calculates work with tension of the rope.

2007-10-09 10:53:42 · 2 answers · asked by sportzblock 1 in Physics

I love star gazing but never even know what I'm looking at. Where can I go to find something similar to the "idiots guide to star gazing”?

2007-10-09 10:52:55 · 5 answers · asked by Apple Pie 2 in Astronomy & Space

Pre calc hw: solve 2x^3 + 2x^2 = 4x + 4. Please show work if possible thanks for the help on this one.

2007-10-09 10:48:30 · 2 answers · asked by Gabe E 1 in Mathematics

2007-10-09 10:43:28 · 9 answers · asked by ningis n 1 in Astronomy & Space

Like in the industry

2007-10-09 10:40:06 · 2 answers · asked by Anonymous in Chemistry

Math Polynomial P(x) is divided by x-2. The quotient is 2x^2 + x-2 and the remainder is -1. Find P(x).
Please show work if possible thanks for the help

2007-10-09 10:39:34 · 4 answers · asked by Gabe E 1 in Mathematics

2007-10-09 10:39:21 · 3 answers · asked by Anonymous in Earth Sciences & Geology

A student carelessly allows some aluminum tongs to sit a beaker containing CuCl2 solution for a period of tim and a reaction occurs.
The original mass of tongs : 85.1 g
Final mass of tongs: 73.2 g

a) calculate the moles of atoms of aluminum reacted.
b)calculate the number of atoms of aluminum that reacted.
c) Calculate the moles of atoms of copper that are produced. (Hint: use ratio)
d) Calculate the mass of copper that is produced

2007-10-09 10:38:05 · 1 answers · asked by Anonymous in Chemistry

where does the Colorado River begin? tell short and to the point

2007-10-09 10:37:24 · 12 answers · asked by Dried_Squid 2 in Geography

2007-10-09 10:37:15 · 6 answers · asked by Anonymous in Weather

A cart slides down an inclined 1.44m long inclined ramp. The height of the ramp is .10m. The angle of the ramp is not given.

The work done by the friction is -.06. I need to figure out the value of the friction force acting on the cart. The formula I'm using is Work done by the friction = Friction force * d cos theta.

My problem is that since the problem doesn't provide the angle, I'm not sure what to use for theta - should I use 180 degrees because the friction force is acting in the opposite direction? Or should I use 4 degrees (by deriving the unknown angle by using sin theta = height/length of ramp).
Thank you for your help.

2007-10-09 10:36:06 · 2 answers · asked by Eva 1 in Physics

please help meee
i dont understand it

thanx

2007-10-09 10:31:58 · 5 answers · asked by -x-lollie-x- 1 in Mathematics

e^x + e^-x = 10

I solved it graphically, but I have to know how to do it algebraically.

I have no idea how to attack this, I figured I'd take the natural log of all three to get an answer:

lne^x + lne^-x = 10
x - x = ln10
0 = ln10

That's obviously not right. How do I approach this? Thanks.

2007-10-09 10:31:14 · 4 answers · asked by Anonymous in Mathematics

V1x =
V1y =
V2x =
V2y =

(b) Determine the sum V1 + V2.
Magnitude

Direction
° (counterclockwise from the +x axis is positive)




? help please

2007-10-09 10:29:04 · 2 answers · asked by Shawn Carter 1 in Physics

2007-10-09 10:27:26 · 5 answers · asked by DEPRESSED™ Volatile Tempter 3 in Biology

f(x)= x^3/2 when x= -6

2007-10-09 10:24:32 · 2 answers · asked by needalittlehelp 1 in Mathematics

I dont understand what im sopposed 2 write!!! plz HELP ME!!

2007-10-09 10:24:20 · 5 answers · asked by Anonymous in Botany

like what is the difference between 60, 75, and 100 watts? Does 100 watts last longer? Or is it just brighter? Or both?

2007-10-09 10:23:48 · 5 answers · asked by Anonymous in Other - Science

Do they mean "light moves in wave and not in a straight line'.?

2007-10-09 10:23:41 · 3 answers · asked by Padmini Gopalan 4 in Physics