Science & Mathematics - 17 July 2007

What is time?

2007-07-17 08:21:52 · 14 answers · asked by donmorano 2 in Astronomy & Space

5x^2=5

&

(x-2)(x-3)=6

& explain please

2007-07-17 08:18:43 · 9 answers · asked by Anonymous in Mathematics

2007-07-17 08:18:11 · 10 answers · asked by Anonymous in Physics

2007-07-17 08:15:56 · 6 answers · asked by Anonymous in Mathematics

The pressure inside a bottle of champagne is 4.5 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 1.1 cm. What is the frictional force on the cork due to the neck of the bottle?

2007-07-17 08:15:52 · 5 answers · asked by Anonymous in Physics

2007-07-17 08:14:14 · 3 answers · asked by dipndry 1 in Engineering

when I gave them old fashioned popcorn, made in a pop corn popper, all was fine and they totally LOVED it..but I gave them some microwaved popcorn and it totally sizzled when it hit the water
Does anyone know what caused the sizzle sound?

2007-07-17 08:09:58 · 3 answers · asked by Anonymous in Chemistry

I need to find the volume of the solid obtained by rotating the region given by the given curves about the y-axis bounded by

y=36x-6x^2 & y=0

so I have plotted the graph and found the points of intersection to be at 0 and 6

I found the expression of the indefinite integral:

-2x^3 +18x^2 + C

Then I found the parameters I will use to find the volume of my solid which I found by finding the maximum value of y=36x-6x^2 by taking the derivative and setting it to zero. This gave me a value of 3.

So I integrate the function from [0,3] but this only gives me the cross-sectional area.

How do I use the washer method to finish this question? or... did I approach it wrong?

2007-07-17 08:08:47 · 2 answers · asked by Anonymous in Mathematics

z=(square root sign over 2 -i )^4

2007-07-17 08:02:40 · 1 answers · asked by Anonymous in Mathematics

2007-07-17 08:00:44 · 4 answers · asked by *NiCoLA!* 1 in Astronomy & Space

Is there an end to the universe??

2007-07-17 07:58:53 · 37 answers · asked by Anonymous in Astronomy & Space

Someone close to me is currently disabled. But her insurance company is trying to cut off her benefits. I am helping her fight this. She has taken an EMG and the results said that "findings are suggestive of bilateral ulnar motor neuropathy at the elbows, mild bilateral distal and median sensory neuropathy."

But the insurance doctor said these were negative results, because, he claims, "suggestive" means the test didn't find anything. He went even further and said "Suggestive means it's what the patient tells you," not what the test found.

Is this correct? I'd definitely appreciate a great answer. I'm pretty sure sure suggestive is close to a positive finding, if not a positive one. Also, suggestive can't be what the patient tells you, at least not in this case. In this case, the patient does not even know what these medical terms mean.

Thanks a lot.

2007-07-17 07:57:34 · 8 answers · asked by uptownsfinest 1 in Medicine

2007-07-17 07:56:39 · 9 answers · asked by rickyt 1 in Zoology

2007-07-17 07:55:09 · 10 answers · asked by Anonymous in Mathematics

Would it be broken down and digested by the acids in your stomach eventually, or would it pass through you unaffected? Or would it get lodged somewhere and cause problems?

2007-07-17 07:52:46 · 14 answers · asked by Anonymous in Biology

in all cases the rate of reaction decreases
in virtually all cases the rate of reaction decreases
in all cases the rate of reaction increases
in virtually all cases the rate of reaction increases

2007-07-17 07:51:43 · 3 answers · asked by Anonymous in Chemistry

Find a positive alue if the given variable so that the trinomial is factorable .
x^2 + bx + 13 ; b = ?


A ) 15

B ) 12

C ) 13

D ) 14

2007-07-17 07:50:58 · 5 answers · asked by Anonymous in Mathematics

it decreases the activation energy of the reaction
it increases the number of collisions between reacting molecules
it makes the reaction more endothermic
it makes the reaction more exothermic

2007-07-17 07:49:59 · 7 answers · asked by Anonymous in Chemistry

ionic bonds are weak
no covalent bonds need to be broken for reaction to occur
reactions between ions are endothermic
reactions between ions are exothermic

2007-07-17 07:48:59 · 1 answers · asked by Anonymous in Chemistry

Is it ,because we can think?
That we can feel sorrow and pain?

2007-07-17 07:48:46 · 36 answers · asked by Josianne 3 in Biology

2x+3=8

2007-07-17 07:44:54 · 5 answers · asked by DEE H 1 in Mathematics

a)accelerating down a hill
b)going faster and faster
c)slowing down
d)maintaining a constant velocity.

2007-07-17 07:41:58 · 6 answers · asked by Lilly 1 in Other - Science

I've got to the bit where I have:
x+b/2a=the square root of b squared-4ac over 4a squared

I know that x+b/2a=the square root of b squared-4ac over 2a comes next but I don't know why.

Please can someone explain and I'm sorry I can't use maths symbols on the computer. If anyone could tell me how to do that too it would be helpful.

2007-07-17 07:40:54 · 6 answers · asked by becky 2 in Mathematics

the energy of the products is lower than that of the reactants
the energy of the transition state is higher than that of the reactants
both (a) and (b) are true
both (a) and (b) are false

2007-07-17 07:39:04 · 1 answers · asked by Anonymous in Chemistry

For the reaction 2NO2(g) ì N2O4(g) at 325 K equilibrium is established when [N2O4] = 0.020M and [NO2] = 1.08 ´ 10- 2M. What is the equilibrium constant for this reaction?

5.8 x 10^-3
2.9 x 10^-1
5.4 x 10^-1
1.7 x 10^2

2007-07-17 07:38:28 · 2 answers · asked by Anonymous in Chemistry

Hollis is paying off two student loans. One loan charges 7% interest per year. The other loan charges 9% interest per year. He owes $1500 more on the 7% loan than he does on the other. Last year he paid a total of $617 interest. How much does he owe on each loan?

Please help me make the two equations.

2007-07-17 07:36:56 · 8 answers · asked by Anonymous in Mathematics

stationary ?

2007-07-17 07:36:26 · 14 answers · asked by ronaldmallier 1 in Physics

in still water, a boat averages 7mph. it takes the same amount of time to travel 20 miles downstream with the current, as 8 miles up stream against the current, what is the rate?

how do i set this up to solve it?

2007-07-17 07:35:34 · 4 answers · asked by Anonymous in Mathematics

Consider fireworks Pets in general can't stand the sound of fireworks. We as human beings are just ignorant to there natural ability of fear towards the big bang. Are they born with this sense. Its happened before. We just forget.

2007-07-17 07:34:41 · 4 answers · asked by RACHEL C 1 in Zoology

- doesn't move around the earth

2007-07-17 07:34:29 · 8 answers · asked by professorgriff321 2 in Astronomy & Space