Science & Mathematics - 29 September 2007

2007-09-29 16:28:53 · 2 answers · asked by Anonymous in Mathematics

Is it possible that in the experiments done to test time dilation, there was only a physical effect on the atomic clocks that made it seem like the actual "time"has changed? Could it be the "relativistiv mass increase thing, or somehow the atoms in the clock were slowed down, but not due to time change?

2007-09-29 16:28:21 · 5 answers · asked by Michael n 2 in Physics

2007-09-29 16:26:55 · 3 answers · asked by nala 1 in Mathematics

2007-09-29 16:26:41 · 3 answers · asked by Terri L 2 in Biology

2007-09-29 16:26:10 · 7 answers · asked by mztana820 1 in Mathematics

2007-09-29 16:24:22 · 3 answers · asked by Terri L 2 in Biology

2007-09-29 16:22:37 · 4 answers · asked by ... 5 in Geography

yeah...please anser if u r totally sure! thnx :)

2007-09-29 16:21:56 · 3 answers · asked by i <3 him 2 in Other - Science

A plane whose air speed is 150 mi/h flew from Abbot to Blair in 2 hours with a tail wind. On the return trip against the same wind, the plane was still 60 mi from Abbot after two hours. Find the wind speed and the distance between Abbot and Blair.

How do I calculate this?????Please be clear, thanks

2007-09-29 16:21:23 · 2 answers · asked by teendeviant 3 in Mathematics

Please help me if you can. This is for a class I am taking.

2007-09-29 16:19:37 · 8 answers · asked by iluvbarbie115 2 in Mathematics

I did my experiment and I got 70.5 degrees celcius.If this isn't its correct boiling point can u give me some reasons why I got this(70.5 degrees celcius)as my boiling point

2007-09-29 16:15:04 · 5 answers · asked by Anonymous in Chemistry

2007-09-29 16:12:55 · 10 answers · asked by Fresh prince 1 in Earth Sciences & Geology

I did.
Years ago while on command watch while serving in the US military.
We saw what looked like car headlights in the sky.
They interacted with each other. Disappeared and reappeared.
They moved about at fantastic speed.
I watched them through high powered military binoculars and still could not make out any thing other than two glowing white lights.
This went on for about 5 minutes.
Eventually they jetted out of site.

2007-09-29 16:09:52 · 10 answers · asked by thomkat 2 in Astronomy & Space

2007-09-29 16:07:56 · 9 answers · asked by Anonymous in Mathematics

In 1947 Bob Feller, a pitcher for the Cleveland Indians, threw a baseball across the plate at 98.6 mph or 44.1 m/s. For many years this was the fastest pitch ever measured. If Bob had thrown the pitch straight up up, how high would it have gone? Please tell me how to solve this!

2007-09-29 16:06:16 · 2 answers · asked by James J 1 in Physics

So I've been stuck on this problem for some time. It seems my physics class will be the end of me. Please help me understand this problem.
A stone falls FROM REST off a cliff and then a second stone is thrown with initial speed of 74.48 m/s after 3.8 secs the first one. Acc due to grav is 9.8. both hit the ground at the same time. (HOW IS THIS POSSIBLE!!!) so the q asks that how long does the first stone take to hit the ground and how high the cliff is?
Please help me!

2007-09-29 16:05:20 · 5 answers · asked by Crashovdr 4 in Physics

What is the best theory?

2007-09-29 16:03:38 · 6 answers · asked by Indiana Jones 6 in Astronomy & Space

2007-09-29 16:02:06 · 1 answers · asked by Haru 1 in Chemistry

what is the easiest/cheapest (preferably free) way to get 12v 1 amp or close (12-24v, 0.9-2a is ok range) from 120vac mains? i have some things i could use to make something, like various transformers, diodes, rectifier, wire, solder, multimeter, variable resistors, etc.

2007-09-29 15:58:53 · 5 answers · asked by Alex 3 in Engineering

this is the last homework problem i have and i dont know what to do!

An empty flask weighs 55.32 g.
How much would the flask weigh if it were filled with water ? (d = .997 g/cm^3 at 25 degrees celsius)

2007-09-29 15:58:04 · 1 answers · asked by robbyack2000 2 in Chemistry

When the core of a star runs out of hydrogen, the star contracts (due to a decrease in the core temperature) and this causes the core to heat up again and start fusing helium. Why doesn't the He start fusing smoothly as the H runs out? Why the bounce / oscillation?

2007-09-29 15:58:03 · 9 answers · asked by morningfoxnorth 6 in Astronomy & Space

solve:
4^x=9

please show me how u work it out

2007-09-29 15:51:11 · 4 answers · asked by yassem1ne 2 in Mathematics

We live where there are many wildlife animals; deers, wild turkeys, rabbits, quil, squirrels, skinks, etc. The deers come to my place on a regular basis. I have never hear them make a sound with their mouth. Sometimes one will chase away another deer, but they kick at each other.

2007-09-29 15:50:15 · 7 answers · asked by LADY AT THE LAKE 3 in Zoology

2007-09-29 15:44:19 · 4 answers · asked by Weedman 3 in Mathematics

vpython is visual python, and python is a computer language.

2007-09-29 15:40:49 · 1 answers · asked by h_oboe 2 in Engineering

What does 555^2+2(555)(445)+445^2=?
495950
10000
495297
1000000
9986

2007-09-29 15:38:06 · 7 answers · asked by Anonymous in Mathematics

on the day after tomorrow, which by the way is on right now, how come the eye of the storm is much more dangerous than the other part? (the eye of the storm is happening right now for anybody who is watching, for those who have seen it though should know what I'm talking about. The eye is the clear sky part with clouds surrounding it that makes everything freeze up) anyways..... I don't understand why it's more dangerous.

2007-09-29 15:37:11 · 8 answers · asked by KU! 3 in Weather

I have no idea how to do this one...i found a similar one where the distance was 15mph and the top speed was the same and the ans was 3 and 1/3

anyways heres the question
A motorboat goes 18 miles downstream at its top speed and then turns around and returns 18 miles upstream at top speed. The trip upstream took twice as long as the trip downstream. If the boat's top speed is 10 mph in still water, how fast is the current? (Hint: If the current speed is r miles per hour, then the motorboat travels at (10 + r) mph downstream and at (10 - r) mph upstream.)

Express your answer as a decimal rounded to the nearest hundredth.

2007-09-29 15:35:29 · 6 answers · asked by kailynflowers 1 in Mathematics

It's liquid bromine pumped into a heat source, vaporized, and moved.............to do something.

Bromine properties:
Boiling point: 58.85C
Latent heat of vaporiztion: 193.83J/g
Specific heat capacity: 0.473J/g-C

Don't worry about the heat source. It's just a meteor that fell in my back yard.

http://s223.photobucket.com/albums/dd78/floodtl/?action=view¤t=bromineX.jpg

2007-09-29 15:33:55 · 1 answers · asked by Anonymous in Engineering

1. Explain why a motorcycle is tilted as it rounds a curve.
2. Explain why a clothesline with a wet towel hung at the center of the line cannot remain stretched taut between two poles.
3. The mass of the moon is about 1% that of the earth. Is the centripetal force that keeps the moon in its orbit around the earth much smaller than, the same as, or much greater than the gravitational force exerted on the moon by the earth?
4. Give one example in which the distance traveled is a significant amount yet the corresponding displacement is zero.
5. Give one example of a physical system where a particle moves at constant velocity while at the same time has acceleration.
6. Explain the difference of a conservative and a non-conservative force and give one example of each.
7. When you climb a mountain, is the work done on you by gravity different if you take a short, steep trail instead of a long, gentle trail? If not, why do you find one trail easier?

2007-09-29 15:32:11 · 2 answers · asked by la 1 in Physics