Science & Mathematics - 3 October 2006

2006-10-03 15:30:35 · 4 answers · asked by Karan S 1 in Chemistry

2006-10-03 15:28:48 · 3 answers · asked by steff 1 in Chemistry

A rocket engine can accelerate a rocket launched from rest vertically up with an acceleration of 20.0 m/s^2. however after 50.0s of flight the engine fails. g= 9.80 n/kg

what is the rockets' altitude when the engine fails?
when does it reach its maximum height?
what is the maximum height reached?
what is the velocity of the rocket just before it hits the ground?


What are the formulas' that I use to find these answers?

2006-10-03 15:28:35 · 3 answers · asked by Trevor M 1 in Physics

2006-10-03 15:27:01 · 7 answers · asked by osunumberonefan 5 in Medicine

i have the mass, volume,density

2006-10-03 15:22:47 · 15 answers · asked by Anonymous in Mathematics

2006-10-03 15:22:21 · 6 answers · asked by Anonymous in Chemistry

The average amount parents and children spent per chld on back-to-school clothes in Autumn 2001 was $527. Assume the standard deviation is $160 and the amount spent is normally distributed.

What is the probability that the amount spent on a randomly selected childe is more than $700?

What is the probability that the amount spent on a randomly selected child is less than $100?

What is the probability that the amount spent on a randomly selected child is between $450 and $700?

What is the probability that the amount spent on a randomly selected child is no more than $300?

2006-10-03 15:20:53 · 2 answers · asked by KISMET 2 in Mathematics

I'm in Calgary, and I like it when it is 20 degrees in the summer, and around 0 in winter.

2006-10-03 15:20:31 · 15 answers · asked by Anonymous in Weather

distinguish between force and pressure?

2006-10-03 15:19:49 · 8 answers · asked by foxy lady 2 in Physics

When the cosmologists say the universe is flat, what does that mean?

If you could explain it briefly in layperson terminology, that would be great. Thanks!

2006-10-03 15:18:18 · 5 answers · asked by powhound 7 in Astronomy & Space

2006-10-03 15:17:51 · 2 answers · asked by Gilbert L 1 in Geography

Explain why the function y=e^(x+c) has a derivative that is itself for all values of c.

2006-10-03 15:16:29 · 3 answers · asked by mochaspice16 1 in Mathematics

Explain why the function y = xe^x have a point of inflection? explain fully.

2006-10-03 15:15:43 · 4 answers · asked by mochaspice16 1 in Mathematics

my daughter needs help and i don't want to tell her the answer.

2006-10-03 15:14:58 · 3 answers · asked by *blonde*star* 1 in Mathematics

2006-10-03 15:14:58 · 3 answers · asked by spurs_rock_321 2 in Medicine

Delta Airlines quotes a flight time of 2 hours, 5 minutes for its flights from Cincinnati to Tampa. Suppose we believe that actual flight times are uniformly distributed between 2 hours and 2 hours, 20mins.

What is the probablility that the flight will be no more than 5 minutes late?

10 minutes late?

What is the expected flight time?

2006-10-03 15:14:16 · 4 answers · asked by KISMET 2 in Mathematics

I have a video camera and monitor that I want to use in a car. They use AC adapters which each output 12 volts, but a different amount of amps. I use an inverter to convert the car's DC current to AC, in order to power these AC adapters. Since the car's DC is 12 volts, I'm wondering if it's possible to skip the inverter and the two adapters and wire the devices directly.

I don't know the amperage of the car's DC output, or if it matters at all. Is there a risk of damaging the equipment if the amperage is too high or too low?

2006-10-03 15:10:03 · 7 answers · asked by samk 4 in Engineering

When you drop a 0.40 kg apple earth exerts a force on it that accelerates it at 9.8 m/s squared toward the earth. If the mass of the Earth is 5.98 times 10 to the 24th power, what is the magnitude of the earths acceleration.

2006-10-03 15:08:20 · 4 answers · asked by mike j 1 in Physics

What is it?

2006-10-03 15:08:15 · 9 answers · asked by spurs_rock_321 2 in Astronomy & Space

2006-10-03 15:07:57 · 10 answers · asked by Chemical Coltraine 2 in Astronomy & Space

What kind of job could I do? I might change my major to Finance because it seems like that is where the money is right now. What do you all think?

2006-10-03 15:06:20 · 12 answers · asked by norskiekid 1 in Biology

i need help in this problem
7x^2-4x-2-8x+4x^2

my answer is
12^2-12x-2
is that the Correct answer ?
my work
7+5=12x
-4-8=-12x
-2
final answer is 12^2-12x-2????

2006-10-03 15:05:40 · 7 answers · asked by plz help me 1 in Mathematics

2006-10-03 15:05:16 · 5 answers · asked by ashley 1 in Biology

How do I work this problem?

A cup of coffee is sitting on a table in an airplane that is flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.28. Suddenly, the plane accelerates, its altitude remaining constant. What is the maximum acceleration that the plane can have without the cup sliding backward on the table?

Can you please help me with this?

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

I've asked this question earlier and still haven't gotten an answer. I've been told how to do it but it's still confusing me b/c I have no idea what the ans is.

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.60 m. Two of the spheres have a mass of 4.50 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert on each other, what is the magnitude of the initial acceleration of the third sphere?

2006-10-03 15:04:41 · 3 answers · asked by blah 1 in Physics

This is for a book I am writing and I can't find the info anywhere. Did they even get rid of pluto? Do we have any more actual planets?

2006-10-03 15:02:56 · 21 answers · asked by Kassi C 2 in Astronomy & Space

Should we learn intelligent design along with Darwin's theory? Why or
why not?

2006-10-03 15:02:26 · 19 answers · asked by Anonymous in Biology

water/air/calsite/humus

2006-10-03 14:59:11 · 12 answers · asked by Lyndz 1 in Earth Sciences & Geology

I have a science project due in December, and it's about about what type of background noise would affect the growth of a plant the most. The problem is, I don't know what types of plants would be the most easiest to use. I've thought about lima beans, but I'm not sure on how to grow those...so some input on that would be helpful also...thanks in advance!

2006-10-03 14:57:44 · 8 answers · asked by numa-numa ninja 1 in Botany

i'm in AP calculus and have now come to the realization that i can't use long division to solve rational functions......i can use synthetic division....but that won't work for all rational functions.....

f(x)=(x^3)/(4-x^2)


here's my work so far.....
-x^2+4 / x^3 + 0x^2 + 0x

-1x
--------------------
-x^2+4 / x^3 + 0x^2 + 0x
x^3 -4x
---------------------
x^2+4x

ok, the math up there is hard to read so let me clarify what i did....first i took -1x and multiplied that by -x^2-4....which left me with 0x^2 + 4x
...but i don't see how i can continue after that....any insight would be appreciated

2006-10-03 14:56:57 · 7 answers · asked by egyptsprincess07 3 in Mathematics

2006-10-03 14:53:51 · 1 answers · asked by alexbk4ever 1 in Mathematics