Science & Mathematics - 9 October 2007

then there is no sound right? so when a star explodes, or the black hole feeds, still no sound. i can't fatham that.

2007-10-09 09:20:53 · 11 answers · asked by CJJ 2 in Astronomy & Space

Is there any animal specie that have no sex / gender?

2007-10-09 09:18:58 · 2 answers · asked by Anonymous in Zoology

An initial .38 moles of POCl3 are placed in a 3.3 L container with initial concentrations of POCl and Cl2 equal to zero. What is the final concentration of POCl3? ( you must solve a quadratic equation)

1. final concentration = .219 M
2. final concnetration = .0526192 M
3. final concentration = .089 M
4. final concentration = .334152 M
5. final concentration = .0263096 M

2007-10-09 09:17:37 · 1 answers · asked by yakov59 1 in Chemistry

2007-10-09 09:15:11 · 5 answers · asked by Marty B 2 in Mathematics

I am about to literally pay two runners to figure this out- anyway:

Runner A is initally 5.6km west of a flagpole and is running with a constant velocity of 8.8km/h due east.

Runner B is initally 4.9km east of the flagpole and is running with a constant velocity of 7.9km/h due west.

When they hit, how far will they be from the flagpole.

I keep getting 3.9!

2007-10-09 09:11:39 · 1 answers · asked by Anonymous in Physics

A fire helicopter carries a 773 kg bucket at the end of a 25.9 m long cable. When the helicopter is returning from a fire at a constant speed of 40.4 m/s, the cable makes an angle of 37.2 degrees with respect to the vertical.
The acceleration of gravity is 9.8 m/s/s.
Find the horizontal force exerted by air resistance on the bucket. Answer in units of N.

2007-10-09 09:10:36 · 1 answers · asked by lilprincess_2good4u 1 in Physics

So how are daughter and parent cells the same and how are they different. Also this is during Mitosis.

2007-10-09 09:10:14 · 2 answers · asked by Anonymous in Biology

2007-10-09 09:08:25 · 4 answers · asked by jenny_kimz 1 in Zoology

2007-10-09 09:08:17 · 1 answers · asked by evie™ 1 in Earth Sciences & Geology

2007-10-09 09:01:10 · 5 answers · asked by Nature 2 in Earth Sciences & Geology

Suppose a golf ball has a mass of .05kg is hurled with a speed of 10 m/s at a heavy bowling ball of mass 1.5kg initially at rest and bounces elastically from the bowling ball.

Which ball has the greater momentum after collision. Why?
Which has the greater kinetic energy and why?

2007-10-09 09:00:06 · 2 answers · asked by txsweetpea512 1 in Physics

between the earth and the sun to that between Jupiter and the sun. The mass of Jupiter is about 318 times the mass of the Earth. The gravitaional attraction between the sun and Jupiter is stronger by a factor of about____________?

PLEASE HELP!!

2007-10-09 08:57:43 · 5 answers · asked by f16pilottmo 2 in Astronomy & Space

The rear of a bicycle passes a point O on a road with a velocity 4ms-^1 and an acceleration of 2ms^1.4 seconds later the front of a car passes O with a velocity of 2ms-^1 and an acceleleration of 4ms-^1.How far from O does the front of the car meet the rear of the bicycle? Please help so may of times q's like these come up nd i cant do em

2007-10-09 08:55:04 · 1 answers · asked by the phenom 1 in Physics

If the parametric curve starts at (5,-6) when t=0 and ends at (1,1) at t=1, then find a,b,c,d if the parametric equations are x=a+bt and y=c+dt!

2007-10-09 08:53:21 · 4 answers · asked by garrett m 1 in Mathematics

I was working on my house and found an old rock with a very clear image of a fossil, (fish like) about 4 inches long. I hate to just throw it away. Someone might really be into this type of history. What can I do with it? I live in southwest Los Angeles area. Thank you.

2007-10-09 08:51:50 · 2 answers · asked by kingsley 6 in Earth Sciences & Geology

2007-10-09 08:50:26 · 9 answers · asked by AngolianSientist 1 in Engineering

I am having a very difficult time in my Algebra class learning how to calculate slope. My teacher rushes through the lecture, and leaves over half of the class in a stuper. Could someone, ANYONE, make an attempt to help me figure these problems out? And do you have any tips/suggestions that may make learning how to calculate slope any easier?

THANK YOU from the bottom of my heart to all who may answer and help me with this question!!!

Write an equation for each line passing through the given pair of points. Give the final answer in slope-intercept form.

1. (-1, -7) and (-8, -2)
2. (1/2, 3/2) and (-1/4, 5/4)

Write an equation of the line satisfying the given conditions. Give the final answer in slope-intercept form.

3. Parallel to 5x=2y+10; y intercept (0, 4)

Thanks again!!!

2007-10-09 08:49:37 · 4 answers · asked by mrsdynamite 2 in Mathematics

2007-10-09 08:48:31 · 1 answers · asked by goldfinger29209 1 in Geography

thnx

2007-10-09 08:47:36 · 13 answers · asked by jon 1 in Mathematics

2007-10-09 08:47:29 · 4 answers · asked by JoAnna 2 in Earth Sciences & Geology

i know all this problems are easy but i am having hard time with my physic because i dont' understand physic,so plz help me as much as you can 1 or 2 is better than nothing =]

1.when representing velocity as a vector?
2.in order to find the components of a vector,you should....?
3.which of the following would not be considered a projectile?
4.the horizontal component of a projectile's velocity is independents of.....?
5.in the absence of air friction,the vertical component of a projectile's velocity doesn't change as the projectile moves?
6.in the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves..is true or some time true or alway false?
7.which best approximates the resultant of a pair of 10 unit vectors at right angles to each other?
8.when in orbit,a satellite like the space shuttle is....?

2007-10-09 08:46:30 · 2 answers · asked by some guy =] 3 in Physics

2007-10-09 08:46:28 · 1 answers · asked by breanna w 1 in Earth Sciences & Geology

A baseball diamond is a square with side 90ft. A batter hits the ball and runs towards first base with a speed of 24ft/s. At what rate is his distance from second base decreasing when he is halfway (45ft) into first base? At what rate is his distance from 3rd base increasing at the same moment?

2007-10-09 08:43:46 · 3 answers · asked by Anonymous in Mathematics

2007-10-09 08:43:28 · 2 answers · asked by CARL E 1 in Mathematics

Cs isotpe 135

2007-10-09 08:42:02 · 6 answers · asked by Anonymous in Chemistry

?????????????????

2007-10-09 08:39:57 · 3 answers · asked by Emily 2 in Earth Sciences & Geology

if you know any of the following, then please include.
-when the next major meteor shower can be seen in toronto/newmarket, ontario.
-where to see each major meteor shower in 2007.
-a little info on each major meteor shwer.
-anything you know about meteor showers.
-a good website that includes anything above
thanks

2007-10-09 08:39:23 · 8 answers · asked by meteor showers 1 in Astronomy & Space

do you think that humans will witness the death of our sun?

2007-10-09 08:31:42 · 11 answers · asked by Bob The Fish 3 in Astronomy & Space

I was assigned a sheet full of problems in physics class, and I got them all except these two. Could anyone help me please?

1. A car is stopped at a stoplight. As soon as it turns green, it accelerates 10 ft./s^2 while a truck that didn't stop, having a constant velocity of 30 ft./sec passes the car.

How far beyond the starting point will the car overtake the truck, and how fast will the car be traveling at this time?

-------------------------------

2. A student wants to test acceleration due to gravity, so he climbs to the top of a 900 ft. tall building and falls off the roof. 5 seconds later, Superman arrives at the scene and flies down to the bottom to catch him (Assume Superman's acceleration to be acceleration due to gravity).

A. What must Superman's Initial velocity be to catch the student immediately before the student would hit the ground?

B. What must be the height of the building so that even Superman cannot save him?

2007-10-09 08:30:58 · 2 answers · asked by Anonymous in Physics

http://i24.tinypic.com/72ahl4.png
CLICK ON IT! i dont know how to type a radical on the com..sorryy PLEASE EXPLAIN. ugh im not getting the right answer. thanks so much. much love

2007-10-09 08:28:21 · 5 answers · asked by hOLLiSTER gURLiE! 1 in Mathematics