Science & Mathematics - 13 December 2007

If pharmacists usually work 40 hours per week, why do self-employed pharmacists work about 50 hours per week? Why is that?

2007-12-13 10:12:31 · 5 answers · asked by Anonymous in Medicine

A right circular cylinder is 188.5 square inches ,if its height is 7 inches,what is it radius?
A = 2pi r h+2pi r^2
188.5=6.28(7)r+6.28r^2
6.28r^2+43.96r-188.5=0
I dont know to how to go from there

A bathroom tub will fill in 15 minutes with both faucets open and the stopper in place. With both faucets closed and the stopper removed,the tub will empty in 20 minutes. How long will it take for the tub to fill if both faucets are open and the stopper is removed?
x=faucets y=stopper ,x+y=15,15-x-y=20
do i set it like this to a system of equations?

An air rescue plane averages 300 miles per hour in still air. It carries enough fuel for 5 hours of flying time. If,upon take off,it encounters a wind of 30 miles per hour and the direction of the airplace is with the wind in one direction and against it in the other,how far can it fly and return safely? Assume that the wind remains constant.
300/(x-30) + 300/(x-30) = 5
[300(x-30)+300(x+30)] /(x-30)(x+30) =5
600x/x^2-900 =5 ?

2007-12-13 10:12:30 · 1 answers · asked by Anonymous in Mathematics

I look every where on the internet and I can't find one. Does any know I wedsite where I could find it. I already tried google. I can't draw it out either. My teacher said he would take points off.

2007-12-13 10:10:14 · 3 answers · asked by .Heather. 3 in Chemistry

2007-12-13 10:07:43 · 3 answers · asked by Smart1 1 in Chemistry

After suffering a blow to the beack of the head, a patient becomes comatose but vital signs are stable. This suggests an injury to:

a) Postcentral gyrus
b) reticular formation
c) limbic system
d) cerebellum
e) medulla

2007-12-13 10:06:37 · 2 answers · asked by Anonymous in Biology

2007-12-13 10:05:05 · 7 answers · asked by Kimberly M 1 in Mathematics

Some researchers believe that the dinosaur Barosaurus held its head erect on a long neck, much as a giraffe does. If so, fossil remains indicate that its heart would have been about 11 m below its brain. Assume that the blood has the denisty of water, and calculate the amount by which the blood pressure in the heart would have exceeded that in the brain. Size estimates for the single heart need to withstand such a pressure range up to two tons. Alternatively, Barosaurus may have had a number of smaller hearts.
Pa

2007-12-13 10:04:28 · 1 answers · asked by Anonymous in Physics

can u guys telll me how to do this problem>??
a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses,what is the probability that the coin will land with the head up on the fourth toss?

2007-12-13 10:03:51 · 4 answers · asked by Anonymous in Mathematics

How can I calculate the vertical velocity at the end of an objects time interval with Net Force, Mass, Time and Angle given. The question is worded: A net force of 17.0N is applied to a 0.34-kg soccer ball for 0.090s causing it to move off at 28 degrees above the horizontal. Determine the vertical velocity of the soccer ball at the end of the 0.090-s time interval.

Any help is much appreciated!!

2007-12-13 09:59:29 · 1 answers · asked by brushedred99 1 in Physics

Can someone list 1 or 2 reactions that I could do to tell which solution is which (they're in unlabeled bottles).

2007-12-13 09:59:20 · 2 answers · asked by Anonymous in Chemistry

I need help because i cant find the importance of slope anywhere.

P.S.
please answer in full sentences....

2007-12-13 09:58:49 · 7 answers · asked by Princezz Icy 2 in Mathematics

Scientists have taken a gene from a flounder (a type of fish) and combined it with tomato gene to make a new species of tomato that is more tolerant of cold weather. Many people are against bioengineered food. Why do you think that is?

2007-12-13 09:57:47 · 4 answers · asked by Anonymous in Biology

2H2S + NaOH -> Na2S + 2H2O

2007-12-13 09:56:53 · 1 answers · asked by Anonymous in Chemistry

I just swtiched to that major for the time being but I was wondering what kinda jobs I could really do with that... anyone know???

2007-12-13 09:54:28 · 8 answers · asked by suthrn_sunshine_lsu 1 in Agriculture

im new to the hobby and im looking for the most versitile scope available for under 800.00. looking for quality optics. something that i can use for years to come.

2007-12-13 09:51:55 · 2 answers · asked by mikedelta 3 in Astronomy & Space

If yes - could this also mean that you might have been walking around a thousand years ago?

2007-12-13 09:47:07 · 7 answers · asked by ricnoodle 4 in Biology

and then carries the block horizontally a distance of 14.60 m.

(a) How much work is done by the person in the process?
(b) How much work is done by gravity in the process?

2007-12-13 09:46:42 · 1 answers · asked by Anonymous in Physics

2007-12-13 09:46:41 · 1 answers · asked by mojtaba m 1 in Earth Sciences & Geology

How long has NASA been around for?

2007-12-13 09:45:01 · 4 answers · asked by Anonymous in Astronomy & Space

I want to construct a magic apparatus that will enable a small electric shock to travel from the device through my body to the spectator's hand just my touching my hand to theirs. I would really like to buy this device, but it's a little expensive, so I'd rather build one myself. Any tips?
Check the hyperlinked website for a preview of the real device and to understand the desired effect.
http://www.ellusionist.com/product/accessories/additional+-+other/electric+touch+by+yigal+mesika.do?search=basic&keyword=smoke&sortby=newArrivals&page=1
Thanks

2007-12-13 09:38:08 · 6 answers · asked by Anonymous in Engineering

If a train leaves New York at noon going 10E23 MPG and another train leaves France going 12E6 MPG, then how fast will they be traveling when they leave Earth's atmosphere?

2007-12-13 09:35:25 · 1 answers · asked by Brady M 1 in Physics

please give me your ideas why YOU believe Global Warming does NOT exsist!

2007-12-13 09:34:02 · 6 answers · asked by ~FliZo~ 2 in Earth Sciences & Geology

Ty.

2007-12-13 09:32:33 · 10 answers · asked by Anonymous in Astronomy & Space

I know this is a weird Q. But I ask it a lot. I am just worried that the earth will go kamboom along with the rest of the Milky Way. Also, If this ever happens can we go to an other planet to be SAFE? THANKS SO MUCH!!! :-) :-( :-]

2007-12-13 09:31:27 · 16 answers · asked by Beaner 1 in Astronomy & Space

A baseball player throws a ball from second base to home plate. He releases the ball from a height of 6 feet on a horizontal path with a velocity of 85 miles per hour. Will the ball reach home plate without bouncing? (or on the "fly") If not, how far away from home plate will the ball bounce? If so, what will be the height of the ball when it gets to home plate?

2007-12-13 09:28:43 · 3 answers · asked by kellibelli7392 1 in Physics

Emphasis on convex. If not, counterexample please. Thanks.

2007-12-13 09:28:33 · 3 answers · asked by Anonymous in Mathematics

so i watched this thing on tv where through a telescope we, on earth, saw a star explode like millions of light years away, therefore we literally watched the past. it made me ask does time even exist? why is it to a dying man 14 seconds can seem like our standards of an "hour" and why to a little girl being at disneyworld half a day can seem like this same "hour"? If we look at a planet two light years away...we in 2007, currently view a planet in its 2005 state ... so basically we all have different perspectives, so does time exist or does it make no sense or is it simple relative?

2007-12-13 09:28:21 · 10 answers · asked by goldcharm 2 in Astronomy & Space

I'm stuck on these few problems. Somebody please help me I've been struggling for an hour now.

I need to find the derivitive:

1. f(x) = (2x^2 + 5)^7
2. f(x) = 1 / 3 square root of 3 - x^3
3. y = x^3 square root of x + 1

this one need you need to find the tangent line equation
4. f(x) = square root of 2x + 1 (4,3)

this one you need to find the acceleration
5. f(x) = square root of x^3 + 1 with x = 2

all answers/help/suggestions are appreciated
Thank You

2007-12-13 09:26:34 · 2 answers · asked by Anonymous in Mathematics

the question reads

find the equation of the tangent to the parabola

y= 5 - x^2 at P(2,1)

Thanks for any help, i really have no idea, do i substitute x = 2 into the equation? so y=1?

then what :s sub in y so it equals 4- x^2 meaning x= +-2? please help

2007-12-13 09:26:14 · 4 answers · asked by AP12 2 in Mathematics

2007-12-13 09:25:02 · 3 answers · asked by rws8725 1 in Biology