Science & Mathematics - 10 October 2007

a)nearly as fast as the waves it produce
b)as fast as the waves it produces
c)faster than the waves it produces

2007-10-10 08:05:17 · 1 answers · asked by isabel l 1 in Physics

whose vertices A,B,C have coordinates

A=(0,1,2)
B=(1,2,0)
C=(2,0,1)

2007-10-10 08:02:59 · 3 answers · asked by bdx 1 in Mathematics

solve system of equation

5r+2s=0
-3t=12
6s+5t=10

2007-10-10 08:02:51 · 10 answers · asked by Anonymous in Mathematics

2007-10-10 08:02:39 · 6 answers · asked by smartboy_sumit14 1 in Astronomy & Space

|1 2 -1 0|
|1 0 1 1|
|4 5 0 1|
|0 0 3 2|

2007-10-10 08:01:30 · 3 answers · asked by bdx 1 in Mathematics

2007-10-10 07:59:46 · 5 answers · asked by <3 2 in Astronomy & Space

2007-10-10 07:54:05 · 3 answers · asked by Apple Pie 2 in Astronomy & Space

SO2 + O2 -----> ?

2007-10-10 07:51:16 · 1 answers · asked by Chuck 1 in Chemistry

A 1100 N crate is being pushed across a level floor at a constant speed by a force of 300 N at an angle of 20.0° below the horizontal, as shown in Figure P4.37a.
(a) What is the coefficient of kinetic friction between the crate and the floor?
(b) If the 300 N force is instead pulling the block at an angle of 20.0° above the horizontal as shown in Figure P4.37b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in (a).

2007-10-10 07:49:48 · 1 answers · asked by Anonymous in Physics

1.) -2(x-3)=1/2x+3, 2.) 3-(x-4)=x+3, 3.) x+1=-x, 4.) 2x+2=4x-8, 5.)2x+2=-4, 6.) 4x-8=8.

2007-10-10 07:49:47 · 10 answers · asked by Anonymous in Mathematics

2007-10-10 07:47:34 · 4 answers · asked by claire f 1 in Biology

A sled weighing 61.0 N is pulled horizontally across snow so that the coefficient of kinetic friction between sled and snow is 0.100. A penguin weighing 73.0 N rides on the sled, as in Fig. P4.76. If the coefficient of static friction between penguin and sled is 0.700, find the maximum horizontal force that can be exerted on the sled before the penguin begins to slide off.

2007-10-10 07:47:15 · 1 answers · asked by swimchic632 2 in Physics

An object initially at rest falls a distance h. use the formula y= - 1/2 gt^2 to express the time (t) it takes to fall in terms of h and g.

If the object is not initially at rest, but is moving horizontally with a speed v it will go a distance x-vt during the fall. use the time from part 1 to solve for v in terms of h, g, and x.

a balls is shot horizontally. its initially 1 m above ground. it hits the ground after traveling 2 m horizontally. what was the balls initial horizontal speed?

the ball is shot at an angle (theta) above horizontal. it is initially at ground level.. the distance it will travel before returning to the ground is x= v^2 sin (2 theta)/g. use the speed v of earlier ? and find the distance it will travel if (theta) = 30 degrees.

Given the range is x=v^2 sin (2theta)/g what angle should the ball be **** in order for it to travel the longest distance.

please show calculations! do any of the problems you can!

2007-10-10 07:47:01 · 1 answers · asked by Jamie 3 in Physics

Why do people their homework questions on here? We can tell whether you're stuck on homework, or curious (all good reasons to post) or trying to sucker us into doing your homework for you. PLEAAAASE just read your text or search online before you resort to asking on here. I'd love to help if you're stuck and can't find the answer, but it's pretty clear some of you aren't trying at all. Anyone else annoyed?

2007-10-10 07:46:57 · 5 answers · asked by Jenny H 3 in Biology

i was wondering how the use of aluminum is important for glass bulding construction and what type of machine is needed to make the aluminum sutable for such purpose

2007-10-10 07:46:29 · 1 answers · asked by Mr diplomat 1 in Engineering

I have 2 questions.

1.) The light intensity on a screen behind a double slit is shown, in which y = 1.7 cm. The slit spacing is 0.20 mm and the wavelength of the light is 570 nm. What is the distance from the slits to the screen?

The graph peaks in the middle at 12 mW/m^2 and is 0 at each end.

2.) In a double-slit experiment, the slit separation is 195 times the wavelength of the light. What is the angular separation between two adjacent bright fringes?

I have no clue what to do. If anyone can help thanks.

2007-10-10 07:46:04 · 2 answers · asked by johnsonbuckeyefan 1 in Physics

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Picture41.png

2007-10-10 07:37:48 · 1 answers · asked by Anonymous in Mathematics

What is the integral of x² ?

∫ x²

2007-10-10 07:37:28 · 9 answers · asked by Anonymous in Mathematics

5ab +2b
4pq+q
7ty+10y
3xz+5x^2z




thankyooh!

2007-10-10 07:37:00 · 3 answers · asked by Anonymous in Mathematics

The drawing shows a circus clown who weighs 960 N. The coefficient of static friction between the clown's feet and the ground is 0.45. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum pulling force that the clown must exert to yank his feet out from under himself?
Drawing: http://images.google.com/imgres?imgurl=http://webassign.net/CJ/04_58.gif&imgrefurl=http://www.webassign.net/v4cgi/student.pl%3FWebAssignUsername%3Ddemo%26WebAssignInstitution%3Ddemo%26WebAssignPassword%3Ddemo%26Department%3Dv4demo%26course%3D11,1%26struct%3DABDiAYAxBxBvEAEvBMDFDMCXAkCfEnBUAeDUEIDBBcAEAaERCEATAkEjDqCaBGEFBoELArCQDHCmAtCXBFDRBhCxuUCPEPDiDcAbBgEMEmCjDtErCXDkDh&h=321&w=225&sz=12&hl=en&start=1&um=1&tbnid=k3sQw_VDwFG1qM:&tbnh=118&tbnw=83&prev=/images%3Fq%3Dphysics%2BThe%2Bdrawing%2Bshows%2Ba%2Bcircus%2Bclown%2Bwho%2Bweighs%2B.%2BThe%2Bcoefficient%2Bof%2Bstatic%2Bfriction%2Bbetween%2Bthe%2Bclown%2527s%2Bfeet%2Band%2Bthe%2Bground%2Bis%2B.%2BHe%2Bpulls%2Bvertically%2Bdownward%2Bon%2Ba%2Brope%2Bthat%2Bpasses%2Baround%2Bthree%2Bpulleys%2Band%2Bis%2Btied%2Baround%2Bhis%2Bfeet.%2BWhat%2Bis%2Bthe%2Bminimum%2Bpulling%2Bforce%2Bthat%2Bthe%2Bclown%2Bmust%2Bexert%2Bto%2Byank%2Bhis%2Bfeet%2Bout%2Bfrom%2Bunder%2Bhimself%253F%26svnum%3D10%26um%3D1%26hl%3Den%26safe%3Doff%26rls%3DDKUS,DKUS:2006-32,DKUS:en%26sa%3DN

2007-10-10 07:35:04 · 2 answers · asked by Jim E 1 in Physics

2007-10-10 07:32:32 · 12 answers · asked by Anonymous in Mathematics

I honestly do not know the answer to this. Why are DNA and RNA not constantly seeping into all living things? I am doing research on this question, and I would like some intelligent input, please.

2007-10-10 07:27:48 · 5 answers · asked by Rebekah C 1 in Biology

16
S
32.06

A. 4.5
B. 9
C. 18
D. 36

2007-10-10 07:26:23 · 8 answers · asked by chris 1 in Chemistry

2007-10-10 07:24:41 · 4 answers · asked by Angel 1 in Biology

8(t + 7) = 32.... please help!!!

2007-10-10 07:22:24 · 22 answers · asked by just me... 1 in Mathematics

gas in a piston-cylinder assembly with initial volume 100cm^3 is compressed from 1 atm to 2atm. If the process happens at constant temperature, what is the work involved in the process?

i think there is no work involved since T is constant. but i'm not sure. please help!

2007-10-10 07:21:05 · 6 answers · asked by Effrem 1 in Engineering

Given rectangle WXYZ. If WX = 10y - 4 and YZ = 13y - 7, find WX.

1

6

24

32

2007-10-10 07:19:43 · 2 answers · asked by Anonymous in Mathematics

2007-10-10 07:17:32 · 2 answers · asked by Crystal 3 in Mathematics

What Happens If Metals React With Oxygen?

2007-10-10 07:17:16 · 10 answers · asked by Anonymous in Chemistry

A capacitor of capacitance C=10-6 F is discharged through the resistor of resistance
R=10 Ohm. (Switch is closed at t=0) When the energy stored in the capacitor will be half
of its initial value?

2007-10-10 07:16:51 · 3 answers · asked by Anonymous in Engineering