Science & Mathematics - 24 September 2007

In a Diesel engine LPG is added to boost performance. Could Hydrogen go the same, without expensive equipment? A Hybrid with lead acid batteries would produce more Hydrogen, maybe enough to make a difference.

2007-09-24 14:02:16 · 4 answers · asked by Phil R 1 in Engineering

2007-09-24 14:01:59 · 18 answers · asked by Anonymous in Zoology

In a Diesel engine LPG is added to boost proformance. Could Hydrogen go the same, without expensive equipment? A Hybrid with lead acid batteries would produce more Hydrogen, maybe enough to make a difference.

2007-09-24 13:59:11 · 1 answers · asked by Phil R 1 in Engineering

2007-09-24 13:58:57 · 2 answers · asked by Drakebellsbro 2 in Zoology

the problem IS "25,n,12,12,9,17,and 12 if the range is 21, and the median is 12, WHAT'S N?

2007-09-24 13:58:33 · 9 answers · asked by Sohotz 2 in Mathematics

((1/(3+h)) - (1/3)) / h

2007-09-24 13:53:05 · 2 answers · asked by Anonymous in Mathematics

1. a) Describe the process(es) by which (i) energy is produced in the Sun (ii) energy is transferred from the Sun to Earth.
b) Compare the heat radiated by a hot body with the light emitted from a lamp under the following headings:
(i) speed of travel (ii) ability to pass through a vacuum (iii) ease with which they are reflected (iv) ease with which they are absorbed.

2007-09-24 13:49:46 · 1 answers · asked by fabulous and fly 1 in Physics

If AC = 61 and AB is <15 then BC =......

Arrgh!!!

2007-09-24 13:48:44 · 2 answers · asked by Deb 1 in Mathematics

a segment of length (square root) of 10. Instructions are to use a compass on the given line....

2007-09-24 13:47:36 · 1 answers · asked by Deb 1 in Mathematics

2007-09-24 13:45:52 · 2 answers · asked by Random G 3 in Mathematics

My 3 /12 year old son wants to see Mars and I'm completely astronomy illiterate. I believe that it's supposed to be in the southeastern part of the sky (from Tampa, Fl) but that's all I know. It's partly cloudy but I see a big bright star/planet at about 30 degrees up from the horizon (where 90 is straight up). Is that it? Is it the brightest light in the sky?

2007-09-24 13:45:01 · 7 answers · asked by Vitiran 4 in Astronomy & Space

tomorrow i am teaching my class about matter and the 3 states of it which are solids, liquids, and gases. my teachers book says to use vanilla extract as a gas, but it is a liquid. so how do i present this to them with out getting tons of questions. I NEED TO BE ABLE TO TELL WHY VANILLA EXTRACT IS A GAS!!! HELP!!!

2007-09-24 13:44:49 · 12 answers · asked by mshaw1986 2 in Chemistry

1.process of transpiration in autotrophs
2.ability of consumers to move from place to place
3.metabolic activities of soil bacteria
4.evaporation of water from the Earth's surface

2007-09-24 13:41:54 · 2 answers · asked by Just a girl 2 in Botany

Can the mercury leach out of it and harm my vegetables...? Things like tomatoes, cukes, etc. Will I get sick by eating them if they absorb the mercury...?

I realize this must sound a litle silly, but I'm serious, so serious answers only, please! Thanks!

25 SEPT 07, 0142 hrs, GMT.

2007-09-24 13:41:40 · 1 answers · asked by cdf-rom 7 in Other - Science

acorns varied directly as walnuts and inversely as squirrels squared. when there were 28 acorns, there were 7 walnuts and 3 squirrels. how many acorns were there when there were 4 walnuts but only 2 squirrels?

2007-09-24 13:41:31 · 1 answers · asked by mandy 1 in Mathematics

A plane is flying South (270 degrees) @ 500 km/h with a strong wind from east at 45 km/hour. Find the velocity of the plane in reference to the ground

2007-09-24 13:39:03 · 2 answers · asked by Jennifer R 1 in Physics

Member since: September 06, 2007
Total points: 20 (Level 1)
Points earned this week:
--% Best answer

miss_su_09
S Help please?
1.How much work can a 50.0 kg wrecking ball traveling at 5.00 m/s do on the building it strikes?
250
10
1,250
625

2A flower pot falls off a window ledge 10.0 m above the ground. Its velocity as it hits the ground is
unknown because we don't know the mass of the flowerpot.
20 m/s
14 m/s
10 m/s


3.A horizontal force of 275.0 N is exerted on a box with a weight of 745 N while moving it a distance of 2.0 m. How much work was done on the box? (calculate your answer in Newtons - just give me the number, no units in answer area) ?


4. A rock on the ground is considered to have zero potential energy. In the bottom of a well, then, the rock would be considered to have
no potential energy (all kinetic energy)
negative potential energy
zero potential energy, as before.
positive potential energy ?


5. If you do 600 J of work hoisting a 20 kg bale of hay, to what height did you lift it (in meters)?

2007-09-24 13:39:02 · 1 answers · asked by miss_su_09 1 in Physics

why was being so large harmful to dinosaurs ???

2007-09-24 13:38:06 · 4 answers · asked by Sarah 2 in Zoology

1.calculate the speed of the bob at the next-to-last spark mark and
2.the d/t for the bob at the last spark mark
3.calculate the uncertainty in the d/t value for the last visible point

Using diagram
http://img524.imageshack.us/my.php?image=bobxt8.jpg

2007-09-24 13:37:53 · 1 answers · asked by Anonymous in Physics

Just trying to get a sample of opinions from a wide variety of people. Make your answers intelligent and informed, or be gone.

2007-09-24 13:37:07 · 6 answers · asked by Anonymous in Other - Alternative

2007-09-24 13:36:48 · 1 answers · asked by Yaneysi R 1 in Mathematics

Do yo think people who keep asking if you think man has walked on the moon are somehow retarded

2007-09-24 13:35:28 · 15 answers · asked by zebbedee 4 in Astronomy & Space

How do you calculate the volume of a rectangle which has the dimensions: 3.6 cm for length 1.3 cm for width and 1.2 cm for height.

2007-09-24 13:34:48 · 8 answers · asked by Anonymous in Mathematics

2. A golf ball rebounds from the floor and travels straight upward with a speed of 5.0 m/s. To what maximum height does the ball rise?

4. ball is thrown vertically up. 8 s later it returns to point on release. wat is the initial velocity?

5. A diver springs upward with an initial speed of 1.8 m/s from a 3.0 m board, Find the velocity with which he strikes the water. What is the highest point he reaches above water?

I ahve these three formulas i keep trying i just dont kno wat to do with the numbers

2007-09-24 13:33:50 · 1 answers · asked by Anonymous in Physics

when I was looking at the beautiful full moon tonite in Indy, it looked like it was bobbing around. No, I'm not on drugs(not even an aspirin) and there was not one ounce of alcohol in me. Is that a normal optical illusion?

2007-09-24 13:33:33 · 6 answers · asked by Anonymous in Astronomy & Space

NASA sends astronauts in orbit to space stations and satellites but when will they send men BACK to the MOON? You'd think that with this being the NEW MILLENIUM, they'd already been there and done that and going back for more! Looks like our Sci-Fi movies and adventures have all proven to be FLUKES.

2007-09-24 13:32:30 · 6 answers · asked by Delores B 1 in Astronomy & Space

2007-09-24 13:32:13 · 7 answers · asked by ry ry 3 in Biology

...but does not usually limit the distribution of life on land?

1. minerals
2. water
3. nitrogen
4. oxygen

2007-09-24 13:32:00 · 3 answers · asked by Just a girl 2 in Earth Sciences & Geology

2007-09-24 13:31:11 · 5 answers · asked by ry ry 3 in Biology

2007-09-24 13:30:59 · 2 answers · asked by bkekcc 3 in Biology