Science & Mathematics - 2 August 2007

2007-08-02 07:06:59 · 13 answers · asked by ann j 1 in Earth Sciences & Geology

2007-08-02 07:02:54 · 8 answers · asked by Anonymous in Earth Sciences & Geology

A pick axe? then a chisel?

2007-08-02 07:02:42 · 2 answers · asked by themoreitcoststhebetteritis 3 in Earth Sciences & Geology

In several years of experience with Amateur (Ham) Radio, I have learned that there is significant attenuation of UHF and VHF signals when the transmit and receive antennas are at 90 degrees to each other.

Yet most Car Antennas are vertically polarized (some at 45 degrees) while most home based receive antennas (both cheap wire dipole and Yagi) that you can purchase are Horizontally polarized.

Why is this?


Do the broadcasters transmit with both horizontal and Vertical Antennas?

I ask this because I live 60+ miles from several FM stations that I like to listen too, and can receive them just fine with either my Car's Antenna or my Horizontally mounted attic based Yagi.

2007-08-02 07:00:28 · 7 answers · asked by ne5b_ham 2 in Engineering

Like fire ant 3.5 or whatever. The n honeybee 7.0 or something.

Share your most painful experiences!!

2007-08-02 06:54:46 · 12 answers · asked by Hillclouds 2 in Zoology

Big bang theory states that the universe is expanding due to an explosion that took place millions of years ago.When it took place, the velocity of moving particles, including earth was thousands times of a light year.The recently known history of universe says that earth hasn't touched the velocity of light.In due course the speed might be decreased.still it should have at least a speed beyond the speed that it possess now

2007-08-02 06:53:24 · 17 answers · asked by jack 2 in Astronomy & Space

I have read that it is claimed that nothing can travel faster than light (except money out of my wallet!). Is there a simple explanation that a non scientist like me can understand why that should be so? It sounds rather like, for example, someone three hundred years ago saying "no one will ever travel at over 1,000mph", simply because the technology did not exist at that time.

2007-08-02 06:49:14 · 17 answers · asked by Pershore 2 in Physics

2007-08-02 06:45:52 · 5 answers · asked by Anonymous in Biology

generater with the ability to rejuvinate its own magnetic charge and produce enough current to power a 60watt lightbulb for say, several years or longer? Imagine a group of these NPMD boxes hidden under your floor or in the ceiling powering all of your lights, possibly even 120volt outlets for standard appliances. The possibilities are endless.

2007-08-02 06:41:10 · 3 answers · asked by Anonymous in Engineering

Your an astronaut aboard the Space Station; the only person aboard. Every other human being is on Earth. Attempts to destroy a comet have failed. You watch as the enormous comet hits earth, creating a fiery circle, which travels the whole way around the Earth. The Earth is overcast in black cloud.

What do you do next?

2007-08-02 06:40:32 · 18 answers · asked by vEngful.Gibb0n 3 in Astronomy & Space

2007-08-02 06:39:50 · 6 answers · asked by SadToday22 3 in Mathematics

I moved to Idaho 2 years ago from So. Cal and am experiencing all the seasons for the first time in my life, it is so great.

2007-08-02 06:39:12 · 8 answers · asked by zzyzx08 3 in Weather

Suppose f:R-->R satisfies f(x+y)=f(x)+f(y) for every x,y in R. If f is continuous at some point p, prove that there is some constant a in R s.t. f(x)=ax for all x. that is, an additive function that is continuous at even one point is linear-and hence continuous on all of R.

*Remark: In the original statement I had to fix a s.t. f(ax)=ax, but that is trivial because f(0)=0. For a nonzero a, the condition in the book could not have been made generally. Say for f(x) = 2x.

2007-08-02 06:37:15 · 3 answers · asked by guyava99 2 in Mathematics

People believe in a god to explain how the universe is perfectly arranged to allow life as it is. Since we would not be here if the universe formed in any other way could it be that the universe has been created an infinite number of times. This time is the one that happened to be perfect?

2007-08-02 06:36:06 · 15 answers · asked by Barkley Hound 7 in Astronomy & Space

2007-08-02 06:30:09 · 8 answers · asked by idon'tknow 1 in Geography

2007-08-02 06:29:54 · 1 answers · asked by rury 3 in Engineering

2007-08-02 06:28:27 · 3 answers · asked by guyava99 2 in Mathematics

I'm trying to find a horoscope for December 29th, 1988. Does anyone know a site or any information on this date. Like what moon phase, what house was the moon/sun in? ETC. ETC.
Greatly appreciated.
Thanks

2007-08-02 06:26:34 · 5 answers · asked by goddess of the hunt 2 in Astronomy & Space

I am in a bit of a hurry now and I need help doing these maths problems.

Can you please give me the answers and working out. I know this is wrong but the teacher will only explain this tomorrow to me and she has complety fogot to explain it to me and its for marks .

These are the instructions

Convert the following fractions to decimals using either the equivalent fraction Method and the division method.

So bassically I have got to turn the fractions into decimals.

1.3/8=
2.7/16=
3.33/1000=
4. 5/11=
5. 8/125=
6. 5/6=
7. 16/1000=
8. 7/9=
9. 8/16=
10. 17/99=

2007-08-02 06:22:34 · 15 answers · asked by Anonymous in Mathematics

A car with locked wheels stops in a distance D on a dry pavement. If the pavement is icy, so that the coefficient of how far (in terms of D) will this car travel before stopping if it started with the same initial velocity in both cases?

Answer: 8D

This equation can help solve the problem: V^2=Vo^2 - 2a(delta)x

how do I work out this problem?

2007-08-02 06:22:30 · 4 answers · asked by Cheat Sum 4 in Physics

2007-08-02 06:18:47 · 4 answers · asked by daniel a 1 in Chemistry

2007-08-02 06:08:41 · 3 answers · asked by sameerteacher01 1 in Physics

2007-08-02 06:07:59 · 6 answers · asked by Anonymous in Astronomy & Space

2007-08-02 06:06:49 · 5 answers · asked by scootertrash82 2 in Engineering

Random thought.

2007-08-02 06:06:02 · 18 answers · asked by Agnostic Front 6 in Weather

I heard a story about a guy who would occasionally "cleans" his body by starving himself and then taking a bath in warm milk. The reason was that there are worms that develop and live in the body and the scent of the milk would draw the starved worms out of his pores. I think the story is crazy but I'm not sure, is that possible ??

2007-08-02 06:05:08 · 19 answers · asked by tripper 1 in Zoology

i have an electrical pump but want to convert it to a solar pump for an outside fountain

2007-08-02 06:02:25 · 6 answers · asked by bannabeauty 2 in Engineering

2007-08-02 05:59:15 · 6 answers · asked by daniel a 1 in Chemistry

I have 6 different questions that I can't figure out how they got the answer. Can you get the answer for me and explain how you get to that answer. You only need to explain one if you want:
1. 6a(squared) - 4a + 2 = 0
2. 16x(squared) -24x + 9 = 0
3. 4x(squared) - 12x = -9
4. 2x(squared) + 5x - 3 = 0
5. x(squared) - x - 6 = 0

2007-08-02 05:58:12 · 4 answers · asked by Blake & Kayla's mom 1 in Mathematics

A.f(0)>f(1) B. f(2)>f(1) C.f(1)>f(3)
f'(x)=(x-1)^2 and f(x) contains the origin.

2007-08-02 05:56:36 · 2 answers · asked by JYC 1 in Mathematics