Science & Mathematics - 7 November 2007

2007-11-07 09:34:06 · 2 answers · asked by nyyfan 1 in Chemistry

If two starships fly away from each other with speeds 0.6c (that is 60% of speed of light) each, at what rate the distance between the ships increases?

2007-11-07 09:33:42 · 3 answers · asked by Alexander 6 in Physics

A scientific biological response would be very much appreciated. Thank you.

2007-11-07 09:30:56 · 7 answers · asked by Anonymous in Biology

biology,cells

2007-11-07 09:28:58 · 2 answers · asked by Danilo O 1 in Biology

In Example 10.5 (Section 10.3) we found that for a hollow cylindrical shell rolling without slipping on a horizontal surface, half of the total kinetic energy is translational and half is rotational. What fraction of the total kinetic energy is rotational for the following objects rolling without slipping on a horizontal surface?
(a) A uniform solid cylinder.

(b) A uniform sphere.

(c) A thin-walled hollow sphere.

(d) A hollow, cylinder of outer radius R and inner radius R/2.

*I thought I was looking right at the chart the question was talking about but I still am getting wrong answers!!!

2007-11-07 09:27:26 · 1 answers · asked by Walachka 3 in Physics

i need to rewrite it in the form ax+by=c

2007-11-07 09:27:14 · 3 answers · asked by dorothy p 1 in Mathematics

Work done by the battery
Work = UQ = 1 Joule
Energy strored in capacitor according to my textbook
Energy = 1/2 CU² = 1/2 Joule

Where did 1/2 Joule of energy disappear?

2007-11-07 09:26:24 · 1 answers · asked by Alexander 6 in Physics

r^4-(3^2*2^4)?

2007-11-07 09:24:59 · 3 answers · asked by Epitaph 2 in Mathematics

I need a lot of science fomulas.
Like force, and momentum, and acceleration, and velocity, and speed, and kinda anything relating to that suff.
Please help?!

2007-11-07 09:24:29 · 1 answers · asked by Smuckers 4 in Physics

2007-11-07 09:22:52 · 1 answers · asked by Anonymous in Botany

I'm just curios

2007-11-07 09:22:14 · 13 answers · asked by Oppa 2 in Astronomy & Space

It's got 6 letters. The fourth one is an I.
I've narrowed it down to these:

Barium
Cerium
Cesium
Curium
Erbium
Osmium
Indium
Radium

It's a metal and is rare, but is found in some photoelectric cells and in atomic clocks.

2007-11-07 09:22:14 · 4 answers · asked by michelle8 4 in Chemistry

2007-11-07 09:20:10 · 4 answers · asked by Landshark 1 in Geography

how much time does it take to fly from South pole to North pole?

2007-11-07 09:18:57 · 4 answers · asked by Alexander 6 in Mathematics

Question: Find the point between Saturn and the Sun at which an object can be placed so that the net gravitational force exerted by Saturn and Sun on this object is zero.

mass of sun: 1.991 x 10^30
mass of saturn: 5.68 x 10^26
distance between sun and saturn: 1.43 x 10^12

i set the forces equal to each other
GmMsun/r^2 = GmMsaturn/ (d-r)^2

where d is the distance between the two.

I cancelled out common terms and got
Msun/r^2 = Msaturn/ (d-r)^2

I plugged in the values and then tried to solve for r using the quadratic equation, butI kept getting a nonreal answer. any help would be appreciated!

2007-11-07 09:13:17 · 2 answers · asked by Katlyn G 1 in Physics

Points X and Y are two different points on a circle. Point M is located so that line segment XM and line segment YM have equal length. Which of the following could be true?

I. M is the center of the circle
II. M is on arc XY
III. M is outside of the circle


A. I only
B. II only
C. I and II only
D. II and III only
E. I, II, and III

2007-11-07 09:10:00 · 17 answers · asked by Nicole S 2 in Mathematics

If you are given 626mmhg for pressure, to solve for volume, in the above formula,do you have to change this into atm pressure, or can you use either in the P part of the equation? Which would be 626mmhg/760mmhg for the conversion to atmoshere pressure. If I knew this, the gas laws would be a little easier. Thanks for help, I like chemistry, but it can get a little hairy!

2007-11-07 09:09:41 · 4 answers · asked by dannchris@sbcglobal.net 1 in Chemistry

2007-11-07 09:06:26 · 11 answers · asked by blue_eyed_woman_23 3 in Mathematics

2007-11-07 09:06:05 · 2 answers · asked by Anonymous in Biology

2007-11-07 09:06:02 · 2 answers · asked by sehchi_b18 1 in Mathematics

2007-11-07 09:03:15 · 6 answers · asked by Anonymous in Chemistry

How do their magnetic fields differ from the magnetic fields of Earth, Jupiter and Saturn?

2007-11-07 09:01:04 · 2 answers · asked by Anonymous in Astronomy & Space

If a potato core is allowed to dehydrate by sitting in the open air, would the water potential of the potato cells decrease or increase? Why?

2007-11-07 08:58:09 · 2 answers · asked by Kev 2 in Biology

2007-11-07 08:57:17 · 7 answers · asked by sunfire11 1 in Weather

1. -27+(-17)+(-7)+....+43
2. 1 + 4 + 7 +...+142
3. 400+394+388+...+(-32)
4. the first 20 terms of the series 13+20+27+...

2007-11-07 08:57:00 · 1 answers · asked by Anonymous in Mathematics

what are the major raw materials in bobby pins?

2007-11-07 08:56:25 · 1 answers · asked by Anonymous in Chemistry

Assume 13429.7 gallons of water accounts for 2/3 of your water usage for 1 year. Calculate the total amount of water in gallons you use in 1 year

2007-11-07 08:55:02 · 3 answers · asked by Rachel 1 in Mathematics

A) .3 m
B) .2 M
C) .2 m
D) .2 g

2007-11-07 08:54:47 · 1 answers · asked by wtimm99 1 in Chemistry

The x- and y-components of an acceleration vector are 3.0 m/s2 and 4.0 m/s2 respectively.
What is the direction of the acceleration vector (in degrees)?

2007-11-07 08:54:22 · 1 answers · asked by Anonymous in Physics

2007-11-07 08:51:10 · 3 answers · asked by Anonymous in Biology