Science & Mathematics - 28 December 2006

account for this difference

2006-12-28 08:29:59 · 6 answers · asked by chanti 3 in Chemistry

1. What is the equation for the ideal gas law?
2. List what each symbol stands for.
3. What is the value of R?


For 4 and 5, show your equation (symbols only, then your work with the numbers).
4. If 2.44 moles of Helium gas has a pressure of 2.4 atm at 343 K, what volume must the gas occupy?
5. If there are 6.25 L of Hydrogen gas at a pressure of 1.95 ATM and a temperature of 243 K, how many grams of hydrogen are there? (Hint: review assignment 4.8.)

2006-12-28 08:29:16 · 5 answers · asked by Anonymous in Chemistry

Copper (Cu).

2006-12-28 08:28:00 · 4 answers · asked by arreis08 1 in Chemistry

If x and y are positive integers, what is the value of xy?

(1) Greatest common factor of x and y is 10.
(2) The least common multiple of x and y is 180.

You need both statements to come up with answer. I just can't come up with it. Thanks for your help.

2006-12-28 08:25:34 · 8 answers · asked by Julia P 1 in Mathematics

show work please

2006-12-28 08:25:21 · 8 answers · asked by Anonymous in Mathematics

At intervals they have a series of right angles. is it to keep them from freezing? how does that work?

2006-12-28 08:24:55 · 3 answers · asked by domangelo 3 in Engineering

show work please

2006-12-28 08:24:01 · 8 answers · asked by Anonymous in Mathematics

if you had a time machine. would i be right in thinking that you could not go forwards in time. because if you when forwards in time then when you got there it would be the present and the passed. then when you come back to present day the future would be your passed because you have already seen it

2006-12-28 08:23:58 · 13 answers · asked by Anonymous in Physics

show work please

2006-12-28 08:22:01 · 13 answers · asked by Anonymous in Mathematics

I heard that sometimes there is a separate power plant that is built right next to the steel mill for the gas/heat byproducts that would otherwise be wasted. Is this true in the case of US steel mills? I am looking for a list of US steel mills that do this.

2006-12-28 08:21:59 · 1 answers · asked by Anonymous in Engineering

Other than play the lottery, gamble or invest in the stock market.

(Let's just assume this is possible)

2006-12-28 08:21:43 · 8 answers · asked by Patienttraffic 2 in Other - Science

Say in the Future while traveling the stars we would take frozen water from Asteroids and other small objects in space since water is very hard to find out there except on planets. How would one go about purifying it or making it drinkable. Remember free floating objects in space without atmospheres are subject to high amounts of Radiation.

2006-12-28 08:20:51 · 4 answers · asked by Anonymous in Astronomy & Space

Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute and Gear Q makes 40 revolutions per minute. How many seconds after the gears start rotating will Gear Q have made exactly 6 more revolutions than Gear P?

Thank you!

2006-12-28 08:20:50 · 5 answers · asked by Julia P 1 in Mathematics

For every integer k from 1 to 10 inclusive, the kth term of a certain sequence is given by (-1)^(k+1) * (1/2^k). If T is the sum of the first 10 terms in the sequence, then T is:

A) greater than 2
B) between 1 and 2
C) between 1/2 and 1
D) between 1/4 and 1/2
E) less than 1/4

Is there a way to answer this without having to sub in all 10 values for k? I have less than 120 seconds to answer questions like this on the GMAT exam...

Thank you!

2006-12-28 08:19:26 · 6 answers · asked by Julia P 1 in Mathematics

What is the dwarf planet between Earth and Mars called?(I think that is where it is located.)

A new planet was found a few years ago. What is the status on that? does it have a name? Is it beyond neptune?

Which planets spin in the opposite direction of Earth and most other planets on their axis?

2006-12-28 08:19:09 · 6 answers · asked by Anonymous 2 in Astronomy & Space

^? means to the power. For 2^0, it's 2 to the zero power..

show work in your answer please..

2006-12-28 08:18:56 · 20 answers · asked by Anonymous in Mathematics

I know the answer but not how to get the answer.

2006-12-28 08:18:01 · 12 answers · asked by : ) 6 in Mathematics

show work please

2006-12-28 08:14:59 · 9 answers · asked by Anonymous in Mathematics

There have been people on television who can do difficult math in their heads quickly. Awhile ago, a program was introduced on the market to help you to learn how to do it. Does anyone know the name of the program or any info about it?

2006-12-28 08:14:56 · 2 answers · asked by ? 3 in Mathematics

2006-12-28 08:14:42 · 4 answers · asked by Anonymous in Mathematics

2006-12-28 08:12:08 · 19 answers · asked by amanda d 2 in Weather

what is dividing by zero called? what is the term?

2006-12-28 08:11:40 · 4 answers · asked by XxsoccertennisvolleyballxX 1 in Mathematics

2006-12-28 08:09:41 · 24 answers · asked by Jenifer m 1 in Zoology

It was too far from the Twin Towers to suffer any structural damage, the fire inside Bldg 7 was small, Bldg 7 housed important offices like the NYC mayor's emergency command center, CIA and IRS offices, and the building collapsed STRAIGHT DOWN like it was a controlled demoltion.
If debris from the Twin Towers were responsible for the collapse of WTC 7, then wouldn't it have collapsed from the BASE of the building instead of from the top falling down like in a controlled demolition?

2006-12-28 08:09:29 · 5 answers · asked by Anonymous in Engineering

How hot is the explosion in a nuclear blast or asteroid impact.

2006-12-28 08:08:49 · 7 answers · asked by carlos sims 2 in Astronomy & Space

Revising for a/s but can't answer 2 practice questions can anyone help/explain?

1. name the type of chemical reaction that occurs when a strand of mRNA is formed from individual nucleotides?

2. a strand of mRNA has 53 codons but only 51 amino acids. suggest 2 reasons for this difference?

help would be much appreciated

2006-12-28 08:05:29 · 7 answers · asked by will t 2 in Biology

Because in school we just talked about Pangaea and the scientists don't even know! Will it come in our life time?

2006-12-28 08:02:35 · 9 answers · asked by Anonymous in Earth Sciences & Geology

Anything

2006-12-28 08:02:11 · 6 answers · asked by Paul S 1 in Engineering

2006-12-28 08:02:10 · 8 answers · asked by trentrockport 5 in Chemistry

2006-12-28 08:01:53 · 6 answers · asked by irfan b 1 in Medicine