Science & Mathematics - 10 December 2006

1.Each leg of a tripod can extend to a length of 5 feet. What is the maximum possible distance between the ends of two legs?

2. MULTIPLE CHOICE: A triangle has two sides that have lengths of 16 inches and 28 inches. Which of the following could NOT represent the length of the third side?

A. 12 in. B. 26 in. C. 33 in. D 40 in. E. 43 in.

2006-12-10 16:24:05 · 2 answers · asked by Ace 1 in Mathematics

When Apollo 15 astronaut David Scott dropped a hammer and a feather on the moon to demonstrate that in a vacuum all bodies fall with the same (constant) acceleration, he dropped them from about 4 feet above the lunar surface. The television footage of the event shows the hammer and the feather falling more slowly than on Earth, where, in a vacuum, they would have taken only half a second to fall the 4 feet. How long did it take the hammer and feather to fall 4 feet on the moon, if the moon's gravitational acceleration is 13/80 that of Earth?

2006-12-10 16:22:50 · 4 answers · asked by Carter 2 in Mathematics

Imagine a space station which rotates to create artificial gravity (like in "2001: A Space Odyssey" or "Babylon 5".)

Suppose there is an Olympic size swimming pool in the outer ring.

Would the surface of the water in the swimming pool be flat or curved?

2006-12-10 16:22:38 · 5 answers · asked by Wolf Harper 6 in Physics

when the world changed temperatures in the past didn't the inhibitants of the earth then most likely have somehting to do with global warming??? i just don't see why everyone is so freaked out about it. maybe this is suposed to happen. is it really even proven???

2006-12-10 16:21:22 · 10 answers · asked by toefros123 3 in Earth Sciences & Geology

* first person to give a step by step proccesds and the correct answer gets my vote for best answer

Some marbles in a bag are red and the rest are blue. If one red marble is removed, then one-seventh of the remianing marbles are red. If two blue marbles are removed instead of one red, then one fifth of the remaining marbles are red. How many marbles were in the bag originaly.

2006-12-10 16:20:23 · 8 answers · asked by VHS123 2 in Mathematics

2006-12-10 16:19:23 · 4 answers · asked by hellokid 1 in Biology

solve for x if you wish

2006-12-10 16:17:50 · 4 answers · asked by camarodriver682005 2 in Mathematics

I hear "it" would be 99.9% human; but what would it be like if it was born into the world, any experts?

2006-12-10 16:16:21 · 5 answers · asked by wise.to.Jew! 1 in Biology

A 0.075kg ball in a kinetic sculpture is raised 1.33 m above the ground by a motorized vertical conveyor belt. A constant frictional force of 0.350N acts in the direction opposite the conveyor belt's motion. How much total work is done in raising the ball?

What i did:
0.075 kg * 9.81m/s^2 = 0.73575 N = weight force of ball on earth

down forces= 0.736 N + 0.350N = 1N
Opposite force is 1N since acc is constant

Wnet = Fnet (d) (cos ??)
Wnet = (1N) (1.33m)
wnet = 1.33 J

RIGHT??

2006-12-10 16:16:20 · 4 answers · asked by billf39 2 in Physics

which of the following statements are true (more than one is correct)?


a) For binary acids HA in the same row of the periodic table, the greater the electronegativity of A
the stronger the acid HA

b) For binary acids HA in the same column of the periodic table, the stronger the H-A bond
the stronger the acid HA

c) HBr is a stronger acid than HCl

d) H2SO3 is a weaker acid than H2SO4

e) HClO is a stronger acid than HBrO

f) For carboxylic acids : the greater the electronegativities of the atoms in the group bonded to the carboxyl group,
the stronger the acid

The following choices are incorrect: acdf, acd, ade, and acde

2006-12-10 16:15:14 · 3 answers · asked by MARK 2 in Chemistry

i am just wondering

2006-12-10 16:15:06 · 4 answers · asked by stix246 2 in Mathematics

I'm not just talking about human blood. In the whole animal kingdom, what colors does blood come in and what makes the blod those colors?

2006-12-10 16:14:43 · 9 answers · asked by Anonymous in Biology

If there is a lift with a bucket of water and a ping pong ball inside the bucket floating at the top, what happens to the ping pong ball and the water if the lift cable is cut while the lift is several floors up and free falls?

2006-12-10 16:13:19 · 11 answers · asked by deansenter 1 in Geography

2006-12-10 16:13:07 · 6 answers · asked by nazirp 1 in Astronomy & Space

What is the pH of a solution containing 0.25 M acetic acid and 0.25 M acetate ion. Acetic Acid has Ka= 1.8*10^-5.

Pls,not only answer,clear explanation...thanks.

2006-12-10 16:12:51 · 3 answers · asked by Tommy 2 in Chemistry

2006-12-10 16:11:03 · 4 answers · asked by Troy F 1 in Astronomy & Space

What is the final container volume needed to compress an ideal gas to 6.0 atms if before compression was in 4.0 gallon container at 1.5 atms?

2006-12-10 16:10:11 · 2 answers · asked by bruselee14 1 in Chemistry

best answer guranteed

2006-12-10 16:08:33 · 7 answers · asked by Calgarian_man 2 in Mathematics

2006-12-10 16:08:01 · 2 answers · asked by asiya h 1 in Mathematics

i am just wondering.

2006-12-10 16:07:38 · 7 answers · asked by stix246 2 in Mathematics

Electricity I know, but in more detail. I have forgotten what I learned in Physics. That rasies another question, I have only been out of college for one year, I feel like I have forgotten alot of material already, specifically math, physics, even english and spelling. Have others? I hope I didnt drink too much beer in school. Thanks.

2006-12-10 16:02:21 · 13 answers · asked by Ryan 1 in Physics

2006-12-10 16:00:23 · 2 answers · asked by Molly 2 in Chemistry

Thanks for the help. I'm having a serious brain fart. LOL

2006-12-10 15:59:07 · 12 answers · asked by Nerds Rule! 6 in Mathematics

A typical cancer cell has certain mutations in its genome that mess with life cycles of the cell. There is a couple of specific genes that are involved in fixing the cells damaged DNA such as the gene 51, aka "the guardian of DNA". Mutation of DNA sequences mutate these genes and a DNA is on its way towards becoming a cancer cell. The extracellular matrix also becomes disrupted and the cell looses connection with the outside cells. Would it be possible to somehow take a chemically prepared viral decoy: a retrovirus that contains those curing genes, inject it into the bloodstream and save a cancer cell. If the cell looses all connection with the outside, how does it receive the necessary nutrients for continuous growth and reproduction?

2006-12-10 15:58:25 · 5 answers · asked by s_alexander_s 1 in Biology

Using trigonometric identities

2006-12-10 15:56:43 · 4 answers · asked by Robert 1 in Mathematics

2006-12-10 15:55:49 · 6 answers · asked by Sarya D 1 in Physics

2006-12-10 15:55:18 · 4 answers · asked by kev 1 in Mathematics

a. 3,8,√2
b. 2,2,√3,4
c. 7, 7√2,14
d. 5, 10√3,10
e. 3,√3,6

explain your answer

2006-12-10 15:53:56 · 12 answers · asked by jrrkidd 1 in Mathematics

2006-12-10 15:47:42 · 7 answers · asked by Michael C 1 in Biology

a. 3,4,6
b. 25,30,35
c. 10,60,65
d. 6,9,12
e. 9,12,15

2006-12-10 15:46:07 · 7 answers · asked by jrrkidd 1 in Mathematics