Science & Mathematics - 5 November 2006

2006-11-05 10:24:45 · 5 answers · asked by cluj120 2 in Chemistry

A glider of mass 0.152 kg is moving to the right on a frictionless, horizontal air track with a speed of 0.820 m/s. It has a head-on collision with a glider 0.298 kg that is moving to the left with a speed of 2.25 m/s. Suppose the collision is elastic.

Find the magnitude of the final velocity of the 0.152 kg glider.

Find the magnitude of the final velocity of the 0.298 kg glider.

2006-11-05 10:23:23 · 1 answers · asked by darkangelwattitude 1 in Physics

Could some one please help me with the above question? I couldn't find a detailed article on Google. Thanks a lot.

2006-11-05 10:23:13 · 1 answers · asked by smile 1 in Zoology

If spacetime is itself expanding at what rate does it expand?

Should we assume spacetime expands at the speed of light because it can? Or just enough to contain matter and energy so also must be the speed of light.

2006-11-05 10:19:23 · 8 answers · asked by mesun1408 6 in Astronomy & Space

I guess I'm an average speed walker.

2006-11-05 10:18:25 · 2 answers · asked by Moon O 1 in Physics

I'm doing my physics homework and have run across a problem with the direction north of east in it and I would like to know if it's northeast or just north.

2006-11-05 10:15:35 · 13 answers · asked by bri08310 1 in Physics

On a frictionless horizontal air table, puck A (with mass 0.371 kg) is moving toward puck B (with mass 0.251 kg), which is initially at rest. After the collision, puck A has velocity 0.121 m/s to the left, and puck B has velocity 0.652 m/s to the right.

What was the speed v_Ai of puck A before the collision?

Calculate DeltaK, the change in the total kinetic energy of the system that occurs during the collision.

2006-11-05 10:09:20 · 1 answers · asked by darkangelwattitude 1 in Physics

2006-11-05 10:08:15 · 12 answers · asked by Ysabella G 1 in Earth Sciences & Geology

2006-11-05 10:07:56 · 12 answers · asked by Sage 2 in Geography

I do not understand Descartes' Rule of Signs, so please help. I am not necessarily looking for the specific answer, but some direction on how to do these types of problems.

Use Descartes' Rule of Signs to determine how many positive and how many negative real zeros the polynomial can have. Then determine the possible total number of real zeros:

P(x) = 2x^3 - x^2 + 4x -7
and
P(x) = x^8 - x^5 + x^4 - x^3 + x^2 - x + 1

2006-11-05 10:07:44 · 2 answers · asked by James B 1 in Mathematics

out, none of the other bulbs will work.

2006-11-05 10:06:41 · 3 answers · asked by allenmad 1 in Physics

A woman wants to measure the height of a nearby tower. To this end, she places a 9ft pole in the shadow of the tower so that the shadow of the pole is exactly covered by the shadow of the tower. The distance between the pole and the tower is 168ft , and the pole casts a shadow that is 3.75 long. How tall is the tower? Round your answer to the nearest foot. (The figure below is not drawn to scale.)

2006-11-05 10:03:58 · 4 answers · asked by Anonymous in Mathematics

oxygen?

a) 53.4
b) 21.6
c) 145
d) 107

Please show steps too. thanks!!

2006-11-05 10:03:15 · 4 answers · asked by Anonymous in Chemistry

Any ideas of where online to find a graph that shows the capacitance vs displacement of a capacitance transducer?

2006-11-05 10:02:49 · 3 answers · asked by Rori S 1 in Engineering

A. 2 NA (cr) + 2 H20 (l) > 2NaOH (aq) + H2 (g)
B. Na (cr) + 2 H2O (l) > 2 NaOH (aq) + H2 (g)
C. 2 Na (cr) + 2 H2O (l) > 2 NaOH (aq) + 2 H2 (g)
D. none of the aboved

2006-11-05 09:56:36 · 2 answers · asked by allenmad 1 in Chemistry

I keep hearing this strange sound coming from the direction of one of our floor vents. It's only every few minutes or so, but it's a very short, high-pitched squeak. It sounds almost the same as when tennis shoes squeak on a gym floor. I've never heard a sound like that in this room before. I'm not afraid of bats, but I'm curious if that's what the sound could be.

2006-11-05 09:54:46 · 3 answers · asked by Somebody 1 in Zoology

please help me i really don't get it

2006-11-05 09:52:29 · 8 answers · asked by simi 2 in Biology

2006-11-05 09:47:36 · 3 answers · asked by Robert P 1 in Mathematics

in physics

2006-11-05 09:47:12 · 6 answers · asked by this Mike guy 5 in Physics

Any way to do it?

2006-11-05 09:44:16 · 8 answers · asked by trafficer21 4 in Mathematics

the universe never ends and i fell so small. anybody else feel this way?

2006-11-05 09:43:43 · 13 answers · asked by Anonymous in Astronomy & Space

ok it says:
there is a feild with a perimiter of 120m by 150m. You need to put a fence around it. If the poles are placed 2m apart how many poles will you need to put around the entire feild?

yes i know im stupid, but please i just need help :'(

2006-11-05 09:42:55 · 8 answers · asked by bulletprooflonliness 4 in Mathematics

h (x) = 4x + 3 function table

the table looks like this:
x......... h(x)=

-5 =
-1 =
0 =
3 =
5 =


I am still new at starting these

2006-11-05 09:42:42 · 4 answers · asked by Anonymous in Mathematics

2006-11-05 09:41:38 · 1 answers · asked by racm_86 3 in Physics

Draw the Lewis dot structure for an atom of oxygen. using this Lewis dot structure, hypothesize why molecules with an oxygen bonded to two other atoms always had a bent shaape (instead of a straight line).

You don't have to give me lewis dot structure for oxygen.

2006-11-05 09:40:57 · 2 answers · asked by Anonymous in Chemistry

A 5.00 liter sample of gas measured at 27.0 degree C and 1.25 atm of pressure has a mass of 10.13 g. What is the molecular weight of the gas in u??

Please show me how you get it also. Thank you!!
If you know, please answer, if you don't, please don't guess. I'd appreciated very much.

2006-11-05 09:40:44 · 4 answers · asked by Anonymous in Chemistry

I like freezing rain. I dont see why people make such a big deal out of it.

2006-11-05 09:40:21 · 11 answers · asked by Sarah C 1 in Weather

2006-11-05 09:38:07 · 17 answers · asked by Kamille J 1 in Mathematics

2006-11-05 09:37:47 · 6 answers · asked by sexatie 1 in Biology

2006-11-05 09:36:42 · 6 answers · asked by simi 2 in Biology