Science & Mathematics - 1 November 2007

during birth, the baby leaves the mother's body, passing through these TWO BONES: ________ and _______

2007-11-01 17:04:06 · 3 answers · asked by cb 2 in Biology

This is a particle motion problem. A point moves smoothly along the curve y=x^(3/2) in the first quadrant in such a way that its distance from the origin increases at the constant rate of 11 units per second. Find dx/dt when x=3.
This is a Calculus problem. The answer is dx/dt=4 units/second. I want you to explain the answer. Thank you so much. I appreciated it.

2007-11-01 17:03:59 · 2 answers · asked by Anonymous in Mathematics

I cannot figure out this problem, I figured out the answers for part (a) and (d) but I cannot figure out parts (b) and (c). I have tried every equation and plugged and chugged and still no correct answer...Help! Please!

A rotating star collapses under the influence of gravitational forces to form a pulsar. The radius of the star after collapse is 3.00 10-4 times the radius before collapse. There is no change in mass. In both cases the mass of the star is uniformly distributed in a spherical shape.

(a) What is the ratio of the angular momentum of the star after collapse to before collapse?

The answer to part (a) is 1

(b) What is the ratio of the angular velocity of the star after collapse to before collapse?

(c) What is the ratio of the rotational kinetic energy of the star after collapse to before collapse?

(d) If the period of the star's rotation before collapse is 2.00 107 s, what is its period after collapse?

The answer to (d) is 1.8 seconds

2007-11-01 17:03:16 · 3 answers · asked by Anonymous in Physics

2007-11-01 17:02:36 · 5 answers · asked by lightbulb627 1 in Chemistry

why does the moon move across the sky and why are there different phases??

2007-11-01 17:02:16 · 5 answers · asked by BlahBluhBlahBluhBlah 2 in Astronomy & Space

S(s) + O2 (g) --> SO2 (g) Change in heat is -296 kJ/mol

a) How much heat is evolved when 275g sulfur is burned in excess O2?
b) How much heat is evolved when 25mol sulfur is burned in excess O2?

Can someone help me out on this and show me a step by step process on how to solve this?

2007-11-01 17:02:04 · 2 answers · asked by Anonymous in Chemistry

Solve. x^2 – 7x – 4 = 0

2007-11-01 17:01:04 · 3 answers · asked by Anonymous in Mathematics

Solve by using the quadratic formula. x^2 = 5x + 8

2007-11-01 16:59:45 · 10 answers · asked by Anonymous in Mathematics

Simplify 8+√24/2

2007-11-01 16:58:39 · 7 answers · asked by Anonymous in Mathematics

=D You are so smart

2007-11-01 16:58:34 · 2 answers · asked by jennaczar 1 in Physics

A hammer slides down a roof that makes a 32degree angle with the horizontal. What are the magnitudes of the components of the hammer's velocity at the edge of the roof if it is moving at a speed of 6.25 m/s

please help me understand how to do this problem please! i will choose a best answer

2007-11-01 16:56:08 · 3 answers · asked by Anonymous in Physics

2007-11-01 16:55:56 · 9 answers · asked by orldoming 1 in Astronomy & Space

So in class we had a pyramid of reeses and we need to find and equation for the number of candies in each row?and an equation for the sum of all the candies? the pyramid has 1 on the first row, 3 on the second, 6 on the 3rd and so on...we found out there is 220 candies in 10 layers. anyone?

2007-11-01 16:49:39 · 2 answers · asked by am 2 in Mathematics

what do you think of them?????
are they real??????
and how do they work????

2007-11-01 16:47:56 · 20 answers · asked by enemany 4 in Paranormal Phenomena

2007-11-01 16:46:57 · 4 answers · asked by Anonymous in Mathematics

2007-11-01 16:42:42 · 1 answers · asked by djvo3djvo 1 in Mathematics

first one to answer gets 10 pts

2007-11-01 16:40:27 · 3 answers · asked by Goody1234567 2 in Biology

How can we tell which type we are observing? Why do type II explode? What is the type II supernovae core made of just before the explosion that destroys it?

2007-11-01 16:40:07 · 3 answers · asked by Anonymous in Astronomy & Space

2007-11-01 16:39:33 · 1 answers · asked by Amused 1 in Other - Science

Does its tempterature make any difference? What will eventually happen to this White Dwarf?

2007-11-01 16:38:02 · 2 answers · asked by Anonymous in Astronomy & Space

Because there is no air or atmosphere, what would it do?


and why?

2007-11-01 16:36:38 · 3 answers · asked by Anonymous in Physics

2007-11-01 16:34:46 · 2 answers · asked by Anonymous in Astronomy & Space

At noon a private plane left Austin for Los Angeles, 2100 km away, flying at 500km/h. One hour later a jet left Los Angeles for Austin at 700 km/h. At what time did they pass each other
please show work...

2007-11-01 16:33:14 · 9 answers · asked by littlepeculiar13 2 in Mathematics

doesn't say on the package.

2007-11-01 16:33:12 · 4 answers · asked by staggerlee917 2 in Engineering

Look this is a 7th grade problem. B=3s^2t. Solve for t.

2007-11-01 16:32:55 · 5 answers · asked by unni a 1 in Mathematics

I've been told that the continents are moving 3-4 inches closer to each other each year. When and will they ever reunite into one.

2007-11-01 16:31:16 · 7 answers · asked by Anonymous in Earth Sciences & Geology

Sketch a graph of a relation that is not a function and that has all real numbers in its domain and all real numbers less than or equal to -3 in its range.

2007-11-01 16:30:57 · 5 answers · asked by Admire 1 in Mathematics

You have a bag of cubical balloons that you inflate at a rate of 40cm^3 per second, how fast will the balloon's surface area get larger when the balloons edges are 4cm long?

I have trouble solving things implicitly so any help on this would be appreciated.

2007-11-01 16:29:33 · 1 answers · asked by John Avry 2 in Mathematics

2007-11-01 16:24:53 · 4 answers · asked by Anonymous in Weather

what im trying to ask is what is the reproductive structure of willow moss

2007-11-01 16:23:06 · 1 answers · asked by joe boi 2 in Botany