Science & Mathematics - 10 October 2007

2007-10-10 17:29:36 · 2 answers · asked by Anonymous in Earth Sciences & Geology

plz

2007-10-10 17:29:13 · 2 answers · asked by Anonymous in Engineering

using Lim
h->0

2007-10-10 17:29:05 · 6 answers · asked by BCS 2 in Mathematics

My dog recently died.
Please don't make any cruel comments.
I hope this site doesn't have a "war" going on like R&S does.! (cynics and believers battling it out!)

2007-10-10 17:29:02 · 14 answers · asked by Deenie 6 in Paranormal Phenomena

Does gravity act to make a star star smaller or larger?

2007-10-10 17:27:44 · 6 answers · asked by Carlos 2 in Astronomy & Space

2007-10-10 17:22:46 · 11 answers · asked by Anonymous in Engineering

2007-10-10 17:22:26 · 4 answers · asked by rosemary M 1 in Mathematics

2007-10-10 17:22:14 · 10 answers · asked by MV7J 1 in Medicine

2007-10-10 17:20:48 · 14 answers · asked by ganesh 1 in Engineering

2007-10-10 17:20:13 · 2 answers · asked by Michael 1 in Mathematics

A stats prof has noted from past experience that students who do the homework for the course have a 0.90 probability of passing the course. On the other hand, students who do not do the homework for the course have a 0.25 probability of passing the course. The prof estimates 75% of the students in the course do the homework. Given a student passes the course, what is the probability that she or he completed the homework?

2007-10-10 17:19:28 · 3 answers · asked by a.pasternak 2 in Mathematics

No jokers or cynics PLEASE !!

2007-10-10 17:18:33 · 11 answers · asked by Deenie 6 in Parapsychology

if you dont want to tell me what the answer is, please tell me how to do this problem. i always have trouble with these.

1) you have $32.14 to spend for a sweatshirt. the sales tax is 5%. what is the most the sweatshirt can cost?

2) you have $6.46 to spend for a dinner. there is no sales tax, but you want to leave a 15% tip. what is the most the dinner can cost?

thankyou!!!

xoxo

2007-10-10 17:18:14 · 8 answers · asked by ? 4 in Mathematics

2007-10-10 17:15:21 · 5 answers · asked by Lala 3 in Earth Sciences & Geology

Here's my question:
Find the equation of the plane passing through the point P(4,0,-4) and containing the line
x=2-2t
y=1+7t
z=3+3t.

I cant seem to figure it out. thanks in advance for any help.

2007-10-10 17:09:58 · 4 answers · asked by bob oso 2 in Mathematics

2007-10-10 17:08:26 · 10 answers · asked by bmw530i 1 in Astronomy & Space

On this scale how far from the Sun would Jupiter be? How Pluto be from the Sun on this scale? How far away would the Earth be?

2007-10-10 17:06:11 · 8 answers · asked by kris 1 in Astronomy & Space

In a practical real-world situation what must be done to change the cell size (i.e. the area where the base station is said to provide coverage) from a larger to a smaller one?

2007-10-10 17:02:42 · 5 answers · asked by Pierre 1 in Engineering

If H = height, B = area of bottom face, M = area of cross section halfway up, and T = area of top face, then the volume formula V = (H/6)(B + 4M + T) works for a variety of solids, such as a cone, a box, a fustrum, a pyramid, even a sphere or ellipsoid. When does it work or does not work? What are the conditions necessary for it to work?

2007-10-10 17:01:51 · 5 answers · asked by Scythian1950 7 in Engineering

2007-10-10 17:00:38 · 6 answers · asked by kris 1 in Astronomy & Space

I'm taking demazin and cold&flu tablets and both contain pseudoephedrine (I'm sick with a cold or the flu at the moment)

Anyway, they tend to make me drowsy but I've just noticed that they also relax me and help me focus a lot more. Normally, I find it extremely difficult to study, even for 5 minutes because I can't focus and in turn I get stressed out.

However, I'm suddenly in a very focused, relaxed mood and am having no troubles studying at all :S Is this an effect of the pseudoephedrine?

Also what are the effects of combining pseudoephedrine and codeine-ibuprofen pills (such as nurofen plus) because I took them last night and found myself in a bit of a delerius and confused state? Is it dangerous to combine the two?

2007-10-10 16:59:12 · 2 answers · asked by deedee 2 in Medicine

2007-10-10 16:55:34 · 3 answers · asked by Kumar 1 in Geography

2007-10-10 16:52:35 · 2 answers · asked by Kumar 1 in Weather

1)three times the greatest of three even integers exceeds twice the least by 38. find the integers.

2)the difference of two numbers is 12. two fifths of the greater number is six more than one third of the lesser number. find both numbers.


could you write the equation, define a variable, as well as the answer. i'm sorry this is how i understand problems.

2007-10-10 16:48:53 · 7 answers · asked by Anonymous in Mathematics

A balloon was filled with 4800cm^3
the loss of hydrogen gas during filling was 20%. what mass of iron splints and 98% (by mass) H2SO4 were needed to ensure the complete filling of the balloon? assume temperature of 0 degrees C. a pressure of 1.0 atm and 100% yield.

Fe(s)+H2SO4 -----> FeSo4 (aq) + H2 (g)

how do you solve this?

2007-10-10 16:48:31 · 1 answers · asked by sexxxxxxy4u 2 in Chemistry

2007-10-10 16:47:07 · 2 answers · asked by Bobby Saggy 1 in Mathematics

2007-10-10 16:46:59 · 3 answers · asked by Jonathan P 1 in Physics

"Approximately what mass of CuSO4 · 5H20 (250 g/mol) is required to prepare 250mL of 0.10 M Copper (II) Sulfate solution?"

Note: I would really appreciate it if someone could kind of, guide me through the steps, or show me the work, so that I can understand it better. I'm not able to understand that well in class, but after trying to get help on Y! Answers, I've seen that it really does help. (Thanks to the person who answered my last question, btw!)

2007-10-10 16:45:26 · 1 answers · asked by Mishal 2 in Chemistry

Several questions in my homework that i just could not figure out. please help (:

formulas::

vertical
distance= 1/2 * g * t^2
velocity= g * t

horizontal
distance= v * t
velocity= d/t

2. In baseball, a fastball takes about 1/2 seonds to reach the plate. Assuming that such a pitch is thrown horizontally, compare the distance the ball falls in the first 1/4 seconds with the distance it falls in the second 1/4 seconds.

5. a quarterback threw a football at 24 m/s at a 45 angle. If it took the ball 3 seconds to reach the top of its path, how long was it in the air?

2007-10-10 16:36:35 · 1 answers · asked by kiwi 1 in Physics

If the universe is expanding at the same rate of speed in all directions, what is the universe pushing against? Are we in a ball-shaped container?--What contains the universe and could our universe be the product of a universe that was destroyed?

2007-10-10 16:35:31 · 4 answers · asked by Anonymous in Astronomy & Space