Science & Mathematics - 19 November 2007

2007-11-19 23:59:56 · 4 answers · asked by Laurie C 1 in Mathematics

2007-11-19 23:59:45 · 22 answers · asked by Anonymous in Paranormal Phenomena

1)Calculate the water pressure at the base of Hoover Damn. the depth of water behing the dam is 220m.(Neglect the pressure due to atmosphere.)
2)The top floor of a building is 30 m above the basement. Calculate how much greater the water pressure is in the basement compared with the pressure at the top floor.
3)An 8.6-kg piece of metal displaces 1 liter of water when submerged. Calculate its density.
4)A 4.7-kg piece of metal displaces 0.6 litrt of water when submerged. Calculate its density.
5)A one-cubic centimeter cube has sides 1 cm in length. What is the length of the sides of a cube of volume two cubic centimeters?
6)Consider eigth one-cubic-centimeter sugar cubes stacked two-by-two to form a single bigger cube.What will be the volume of the combined cube?How does its surface area compare to the total surface area of the eigth seperate cubes?

2007-11-19 23:47:14 · 2 answers · asked by jealousy 1 in Physics

2007-11-19 23:43:17 · 2 answers · asked by RITCHELLE G 1 in Physics

In bleaching process. What's the effect? Is it an oxidation-reduction reaction? Pls explain clearly....
Thx a lot!!!

2007-11-19 23:39:28 · 1 answers · asked by Anonymous in Chemistry

What is your favourite thing to observe using a simple telescope?

Stars? Planets? Nebulas?
Can all of these be observed through a telescope, what is the easiest of these to observe, and what is your favourite?

2007-11-19 23:37:55 · 16 answers · asked by Link strikes back 6 in Astronomy & Space

and the number of covalent bonds they form?

2007-11-19 23:35:05 · 2 answers · asked by Thanks For The Help.. (^^,) 1 in Chemistry

Suppose a 10,000,000kg ship has a length of 160m while its breadth is 25m. Estimate how deep the ship sinks assuming the bottom to be rectangular with dimensions 25m by 160m. The ship is in the sea. please answer...

2007-11-19 23:33:57 · 3 answers · asked by Meww 1 in Physics

what happens to the size of the balloon? is the rest to the question.

2007-11-19 23:31:21 · 7 answers · asked by alisha d 1 in Chemistry

explain

2007-11-19 23:28:17 · 6 answers · asked by Anonymous in Chemistry

37. A boat goes downstream a distance of 5 mi in 15 min, but it takes 20 min for the return trip. Find the rate of the boat in still water and the rate of the current.

38. An airplane travels a distance of 1980 mi in 6 hr with the wind, but it takes 20 min for the return trip. Find the rate of the airplane in still air and the rate of the wind.

39. It takes a man 23 min longer to jog 5 mi than it takes his son to run the same distance. However, if the man doubles his rate, he can run the distance in 1 min less than his son. What is the man’s rate of jogging and what is his son’s rate of running?

40. The distance between two automobiles is 140 km. If the cars are driven toward each other, they will meet in 48 min. However, if they are driven in the same direction, they will meet in 4 hr. What is the rate at which each car is driven.

2007-11-19 23:23:54 · 3 answers · asked by squall_cloud 1 in Mathematics

what is the effect of temperature on the solubility of solute and gas in water?

2007-11-19 23:23:20 · 1 answers · asked by anna101085 1 in Chemistry

34. A woman has a certain amount of money invested. If she had $6000 more invested at a rate 1 percent lower, she would have the same yearly income from the investment. Furthermore, if she had $4500 less invested at a rate 1 percent higher, her, her yearly income from the investment would also be the same. How much does she have invested, and at what rate is it invested?

35. A chemist has two acid solutions. One contains 15 percent acid and the other contains 6 percent acid. How many cubic centimeters of each solution should be used to obtain 400cm3 of a solution that is 9 percent acid?

36. A tank contains a mixture of insect spray and water in which there are 5 gal of insect spray and 25 gal of water. A second tank also contains 5 gal of spray but only 15 gal of water. If it is desired to have 7.5 gal of a mixture of which 20 percent is spray, how many gallons should be taken from each tank?

2007-11-19 23:20:06 · 1 answers · asked by squall_cloud 1 in Mathematics

2007-11-19 23:17:31 · 4 answers · asked by Kirin Desuke 2 in Other - Alternative

2007-11-19 23:13:04 · 1 answers · asked by jamie 1 in Chemistry

2007-11-19 23:11:49 · 12 answers · asked by Shashi Ranjan 2 in Astronomy & Space

2007-11-19 22:56:22 · 11 answers · asked by Anonymous in Mathematics

If "x" men can do a job in "h" days, how long would "y" men take to do the same job.

A)x/h
b)xh/y
c)hy/x
d)xy/h

Please show step by step if possible. Thanks

2007-11-19 22:44:02 · 6 answers · asked by Sufian 2 in Mathematics

Need to figure what formula to use , So I can undewrstand how to work the rest of the problems I have in this same set up
thank you

2007-11-19 22:02:30 · 1 answers · asked by HisGlory 1 in Chemistry

2007-11-19 21:49:25 · 4 answers · asked by Caressa Joy C 1 in Physics

2007-11-19 21:20:13 · 14 answers · asked by WHITE LOTOUS 2 in Zoology

is that because moon is around earth and sun is around moon and earth is spinning fast than moon? or else? please answer the question. my important test is tomorrow and my teacher said this question is most important question.

2007-11-19 21:11:03 · 7 answers · asked by Anonymous in Astronomy & Space

2007-11-19 21:10:54 · 9 answers · asked by Anonymous in Geography

With no particular mark on them, they have even sized legs, they are about 1/4 inch in total size, they move kinda quick. I live in Oregon, I know what the black widows, Funnel web, hobo spider etc look like, but im curious about this one, because one of them was on my dog. So i was curious if you knew what spider this was?

thanks

2007-11-19 20:57:16 · 4 answers · asked by ♣Kellina♣ 5 in Zoology

i study a electronics module at high school.

the assessment is worked out like this:

exam is 50%
test is 20%
exercises 30%

in order to pass the module, i need to get 40% or more to pass the module.

can some one tell me what i should get in each assessment in order to pass at 40%?

how did you work it out?please help?

2007-11-19 20:38:44 · 6 answers · asked by . 1 in Mathematics

been the result of an impact against an astoride, sending it our way so to speak, and not because of internal gas expansion. If it hit one astoride, could we not expect a shower of such, and should we get ready to counter a possible extinction event?

2007-11-19 20:34:10 · 5 answers · asked by Tacit Hue 5 in Astronomy & Space

I need a book that covers all the topics of theoretical computer science, a sort of bible reference for theoretical computer science. Thanks!

2007-11-19 20:24:47 · 4 answers · asked by franc.stoic 1 in Other - Science

how can i arrange the digits from 10 to 18 in a 3x3 table like so that every row, column and diagonal totals the same amount.

any ideas how that is done, or how i can do it?

2007-11-19 20:22:51 · 4 answers · asked by . 1 in Mathematics

2007-11-19 20:12:09 · 13 answers · asked by Anonymous in Medicine

How tall is Tony Blare.. , and Gorden brown?as they look tall on Tv

2007-11-19 20:05:35 · 3 answers · asked by Anonymous in Mathematics