Science & Mathematics - 20 November 2006

if you have a 3d cube. How many symmetries take vertex 1 to vertex 2? is there six. if there is how do you explain them

2006-11-20 09:54:01 · 3 answers · asked by hanjp123 2 in Mathematics

There is, however, a symbol for ordinary lined lines, intersecting lines, perpendicular lines, and parallel lines.

2006-11-20 09:53:28 · 3 answers · asked by merviedz trespassers 3 in Mathematics

During the a Sunday, I saw a straight line at an angle of 10 and 4 o'clock standing still sort of glitterring really hight in the sky. It seemed like a piece of metal glitterring from the Sun hitting it as it shook a bit. Then, apparently, it tilted forming a triangle shap which no longer glittered; it was just a bright light, where I could kind of make out three dots, one on each point of the triangle. I kind of could see solid lines connecting the dots, but not if the center was hollow. It seemed to rotate about three times, taking the form of a striaght line, and a triangle. Then, in the form of the straight angled line it started moving. I looked down 2 the street to see if anyone was looking up at it 4 about 3 secounds. No one was looking at it; but when I looked at it again there were only two round lights very far away from each other in the sky moving where it was and in the same direction. I searched the sky for a third light or anything else, but nothing. Helecupters?

2006-11-20 09:53:11 · 11 answers · asked by kasar777 3 in Astronomy & Space

If they get pulled together by gravity, then that means they have gained kinetic energy and lost no mass, but the law of conservation of energy forbids that!

2006-11-20 09:50:00 · 2 answers · asked by merviedz trespassers 3 in Physics

A certain volleyball team consists of 4 spikers, 2 setters and 4 spotters.

2006-11-20 09:49:39 · 1 answers · asked by Anonymous in Mathematics

A. a two carbon molecule from a siz carbon molecule
B. CO2 from a three carbon molecule
C. ATP from ADP and phosphate
D. NAD+ from NADH and H+
Explain!!!

2006-11-20 09:49:30 · 2 answers · asked by 000123 2 in Biology

hi, i just need help with some chemistry problems...I've been working so hard to try to understand on how to do these problems and its just not clicking so if you could possibly answer them and explain how you do them please!!! and please use terms that a young child can understand because thats how i am when it comes to chemistry! Thanks!

1.How many grams of hydrogen are produced by the action of hydrochloric acid on 50 grams of zinc?


2.How many grams of copper oxide may be reduced by 10 grams of hydrogen?



3.How many grams of sodium chloride are required to react with 196 grams of H2SO4?


4.How many grams of mercuric oxide are needed to produce 100 liters of O2?



5.How many grams of zinc are needed to produce 100 liters of hydrogen by acid replacement?



6.How many liters of hydrogen are needed to reduce 120 grams of copper oxide?

7.How many liters of oxygen may be obtained by electrolysis of 900 grams

2006-11-20 09:48:45 · 3 answers · asked by Anonymous in Chemistry

At 7:00 a.m. Joe starts jogging at 6 mi/h. At 7:10 a.m. Ken starts off after him. How fast must Ken run to overtake Joe at 7:30 a.m.?

I did it, but it did not match my choices. Can someone please help me here. I obviously did it wrong. :(

2006-11-20 09:48:38 · 6 answers · asked by Lizzie 5 in Mathematics

2006-11-20 09:48:13 · 2 answers · asked by Anonymous in Mathematics

She investigates the rate of change of the area of the ellipse as a increases at 7mm/s and b decreases at 11 mm/s.
1. Assuming that a and b change smoothly, write the known rate and the wanted rate as derivatives.
2. Annie recalls that the the area of an ellipse is A=(pie- i cant type the symbol)times ab. use this relationship among the variables to get an equation for the wanted rate.
3. Annie sets the animation in motion. when a = 30 and b = 50 will the area be increasing or decreasing? at what rate?
4. Annie resets the animation and starts it in motion again. When a =40 and b=20, will the area be ingreasing or decreasing? At what rate?

2006-11-20 09:47:39 · 1 answers · asked by irgrey12 1 in Mathematics

A.8
B.16
C.10
D.6

2006-11-20 09:46:30 · 3 answers · asked by Anonymous in Chemistry

If 2 red balls are selected, what is the probability that they came from box B?

There are 3 red balls and 3 green balls in box A, and 4 red balls and 5 green balls in box B. An experiment consist of first choosing a box at random and then selecting from it 2 balls, one after the other without replacement.

2006-11-20 09:46:22 · 4 answers · asked by Anonymous in Mathematics

i just need help on two of my algebra problems please!

Between 1980 and 1990, the number of cable television subscribers increased by about 3600 per year. IN 1987, there were 41,400 cable television subscribers. Find an equation that gives the number, y, of cable television subscribers, in terms of the year, x. let x=0 correspond to 1980.

After 8 weeks on a fitness program, Greg can jog 30 miles a week. His average mileage gain has been 2 miles per week. Find an equation that gives Greg's mileage, m, in terms of the number, n, of weeks that he stays on the program.

i believe they have to be in slope-intercept form? HELP please!

2006-11-20 09:45:30 · 3 answers · asked by spoiledCHiC. 1 in Mathematics

Do you use a lot of biochemistry knowledge?

2006-11-20 09:45:13 · 1 answers · asked by Anonymous in Biology

White and Black do not count. Natural products do not count.

2006-11-20 09:44:03 · 10 answers · asked by cindyrose 2 in Engineering

A bag contains 3 dimes and 2 nickles. Two coins are selected simultaneously and at random. Let X be the random variable whose value is the value in cents of the 2 coins selected.

2006-11-20 09:43:17 · 1 answers · asked by Anonymous in Mathematics

Please disregard Protons, Neutrons, and Electrons. What is the fastest velocity in Miles Per Hour that man has accelerated an object to thus far. An object is considered to be something like a
bullet, a jet plane, a space ship, a satellite, a space probe, etc.

I am asking this question in light of the many questions on Yahoo Answers concerning possible time travel and the need to go faster than 186,000 miles / second. I don't think we are anywhere close to man made velocities in that range. Can you provide any specifics?

2006-11-20 09:42:26 · 2 answers · asked by zahbudar 6 in Physics

Keep in mind that even though black bears are not as aggressive in nature as grizzlies, they are still bears and they can cause as much damage as a grizzly can so be wise about your answer.

2006-11-20 09:40:41 · 8 answers · asked by ben_ukraine19 2 in Zoology

2006-11-20 09:40:11 · 4 answers · asked by johnetta l 1 in Earth Sciences & Geology

The breadth of a rectangle is 3cm less than its length. The diagonal of the rectangle is 15cm. Find its length and breadth. What is the length of its other diagonal?

2006-11-20 09:40:07 · 4 answers · asked by h0m3r.simps0n 2 in Mathematics

2006-11-20 09:39:32 · 7 answers · asked by Dalton H 1 in Mathematics

A rectangle is three times as long as it is wide.If its lenght and width are both decreased by 2cm, its area id decreased by 36cm2.Find its orginal dimensions.

ii'm so lost. please show work so i can figure out to do the rest of my work

2006-11-20 09:39:17 · 2 answers · asked by alyssa p 1 in Mathematics

2006-11-20 09:36:52 · 11 answers · asked by wanda_brown62 1 in Mathematics

2006-11-20 09:34:57 · 5 answers · asked by wanda_brown62 1 in Mathematics

{(-6,2),(7,2),(6,-3)} {(-1,2),(7,1)(0,-3)} {(-6,2),(7,1),(0,-3)}

2006-11-20 09:33:12 · 3 answers · asked by wanda_brown62 1 in Mathematics

A horizontal force of 150 N is used to push a 41.5 kg packing crate a distance of 6.10 m on a rough horizontal surface. If the crate moves at constant speed. What is the coefficient of kinetic friction between the crate and the surface? Please show your work. Thank You!!!

2006-11-20 09:32:52 · 4 answers · asked by Tennis2127 2 in Physics

its thanks giving! Maria, her sister, brother, mother, father, grandmother, grandfather, uncle bart, and friends mr and mrs.lopez are sitting down to dinner. use the following clues to help you find out where everyone is sitting at the table.
each person is facing the table.

*the table is a rectangel
*maria's mother and father sit at each end of the table.
every male is sitting between two females
*Maria's father is sitting next to two of his children
*maria is sitting next to her father and someone not in her family
*marias grandfather is sitting next to a granddaughter and someone not in the family
*maria's brother sits to the left of his mother and accross uncle bart.

READ ALL OF EM FIRST THEN ANSWER

2006-11-20 09:32:48 · 9 answers · asked by andrew 3 in Mathematics

The original equation is (x^2+1)/(x+1). I found my second derivitive to be (4x-4)/ (x^4+4x^3+6x^2+4x+1). I need to find the points of inflection. I realize that these are found when the second derivitive is equal to zero. Am I correct in assuming that this function has no points of inflection.

2006-11-20 09:29:42 · 4 answers · asked by justsinginrain87 3 in Mathematics

What is the Effor Force?

What is the Resistance Force?

2006-11-20 09:29:28 · 3 answers · asked by Ern Bucket 2 in Physics

What is the chance of rolling a 3 if you roll one number cube?

2006-11-20 09:29:16 · 4 answers · asked by embrown411 1 in Mathematics