Science & Mathematics - 19 October 2007

Which of the following is NOT studied by archaeologists?

(a).Ecofacts or natural features found near a site.
(b).Artifacts such as pottery, weapons, or artwork made by human hands.
(c).Social interaction between groups of people.
(d).Evidence of past human activities.
(e).All of the above were studied by archaeologists.

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What element, found in all plants and animals, is used by scientists to determine approximate dates for an artifact’s age?

(a).Carbon
(b).Mercury
(c). Gold
(d). Oxygen
(e). Iron

2007-10-19 16:54:05 · 7 answers · asked by Anonymous in Earth Sciences & Geology

I'm 21 year old, having higher levels of estrogen, and my questions is if it would be SAFE for a 20 year old guy to take nettle root, chrysin -anti-aromatase, resveratrol-anti aromatase, or maca root in order to boost testosterone levels and prevent any fat buildup and decrease gynecomastia.

It's very hard for me to bulid muscle, and feel energetic. However, when I take resveratrol and maca, I can feel my waist disappering, and gynecomastia going down. When I stop, it goes back up again.

What would YOU recommend?

2007-10-19 16:53:52 · 3 answers · asked by Anonymous in Medicine

2007-10-19 16:52:48 · 5 answers · asked by ausomadam 1 in Mathematics

I would like it to work fine can be used thanks so much

2007-10-19 16:47:08 · 3 answers · asked by Dylan R 1 in Astronomy & Space

1) -4+10+3y/8=0
2) 1/4y-2/3=1/2
3) y/6+y/4= -1
4)-y/6-1=5
5)6-1/8
thanks

2007-10-19 16:46:06 · 1 answers · asked by Anonymous in Mathematics

why do we have to blink our eyes?

2007-10-19 16:45:11 · 5 answers · asked by Anonymous in Biology

Solve the equation ay/x = cz for each of the following

the variable y
the variable z
the variable x

2007-10-19 16:44:54 · 8 answers · asked by Anonymous in Mathematics

what powers the firefly to light up

2007-10-19 16:44:02 · 2 answers · asked by Anonymous in Other - Science

if two telescopes have the same aperature, but different focal ratios. say one is f/5 and the other is f/11.
what would the difference be "at the eyepiece"

2007-10-19 16:42:04 · 2 answers · asked by Anonymous in Astronomy & Space

You may assume that the multimeters are ideal.

2007-10-19 16:41:20 · 5 answers · asked by oopsy 1 in Physics

you circle the earth and punch yourself in the back of the head?

2007-10-19 16:40:18 · 6 answers · asked by Anonymous in Physics

2007-10-19 16:38:24 · 1 answers · asked by Rockstar 6 in Physics

You know that blissful feeling you get when you're listening to a song that you love, but haven't gotten tired of yet? I was wondering if there is a drug that makes you feel that way. I'm not plannng on using whatever drug (if any) produces this effect, so don't feel bad for condoning drug use, I'm just wondering if there is one.

2007-10-19 16:36:59 · 4 answers · asked by chopchopchops 3 in Medicine

2007-10-19 16:36:54 · 2 answers · asked by Anonymous in Botany

The whole theory of the Big Bang as the point of creation for the universe falls down on one simple point. This is the fact that for an explosion to occur it needs something to explode into. If nothing existed before the Big Bang then there was no platform for the explosion to have taken place. In which case it means that if such an enormous bang had once occurred it could only have done so within the framework of a setting which was every bit a part of the physical world as the universe is today. In other words the Big Bang exploded into a physical universe that was already extant before it occurred. Either way this proves that the Big Bang could not have been responsible for the creation of all matter.

2007-10-19 16:34:35 · 14 answers · asked by mike p 1 in Astronomy & Space

or clinton or lipton or washington. who else

2007-10-19 16:33:13 · 3 answers · asked by Anna O 1 in Biology

If a race of super intellectual alien beings far superior to humans came to earth with conquering and taking over as their plan, would you submit to them? Or would you fight for mankind? Even if defeat is imminate...
Live to win!

2007-10-19 16:25:35 · 20 answers · asked by Anonymous in Astronomy & Space

2007-10-19 16:24:17 · 3 answers · asked by Anna O 1 in Biology

2007-10-19 16:24:15 · 6 answers · asked by beltsaregreat 1 in Biology

a)volume of water
b)weight of water
c)both
d) neither
I think it displaces its weight, but volume I'm not sure about.

2007-10-19 16:23:58 · 5 answers · asked by AnonymousOne 2 in Physics

can someone please help me with this, I don't know how this is the answer??

"3/4" is equal to 1'-0". On a 3/4 scale, 6" converts to 8' (actual size)."

AND

"the studs are 16" on the center, 1" on a 3/4 scale."

2007-10-19 16:21:18 · 2 answers · asked by musikartguy05 3 in Engineering

solve for x

abx = cy

2007-10-19 16:19:54 · 10 answers · asked by Anonymous in Mathematics

what is the probability of selecting a red ball?

2007-10-19 16:18:08 · 7 answers · asked by Anonymous in Physics

For time t > 0, in years, the company’s extraction plan is a linear declining function of time as follows:
,
where q(t) is the rate of extraction of oil in millions of barrels per year at time t and b = 0.1 and a = 10.

(a) If it takes 10.6 years to exhaust the reserve and the oil price is a constant $20 per barrel, the extraction cost per barrel is a constant $10, and the market interest rate is 10% per year, compounded continuously. What is the present value of the company’s profit?

2007-10-19 16:17:37 · 3 answers · asked by fijiprize 1 in Mathematics

The molar entropy of helium gas at 25°C and 1.00 atm is 126.1 J K-1 mol-1. Assuming ideal behavior, calculate the entropy of the following.

(a) 0.178 mol He(g) at 25°C and a volume of 4.61 L

(b) 2.37 mol He(g) at 25°C and a volume of 4219.3 L

2007-10-19 16:17:28 · 1 answers · asked by cuteeebabygirl 1 in Chemistry

Assuming that signals are conveyed at 3.06108 m s^–1 regardless of any variations in the atmosphere with increasing height, estimate the maximum propagation delay that would be incurred when a HAP operating at a height of 20 km above the Earth’s surface retransmits data that is directed to it from a ground transmitter directly below, to receiving antennas
spread across a circular area directly below and which is 60 km in diameter. Indicate your
reasoning and any assumptions that you make in your answer. Compare this with typical delays when using a geo-stationary satellite and comment upon the result.

2007-10-19 16:11:16 · 2 answers · asked by ABD A 1 in Engineering

What step could be included in an experiment to show that a specific amount of water diffused into dialysis bag, besides weighting it?

2007-10-19 16:06:33 · 2 answers · asked by Anonymous in Biology

Now, Im not crazy to ask of a device that could bend the laws of physics in order to spin or create its own gravity in mid air.
For example: If you took a top (no real name for it, mabey spinner) and spun it, it would spin on it's tip and not fall down.
Would this involve a gyroscope in order to balnace?
Please answer with comments and conserns.
Thanks.

2007-10-19 16:05:54 · 6 answers · asked by taco 2 in Physics

what is the purpose of each?

i will pick u for best answer to whoever explains it the best!

2007-10-19 16:04:49 · 2 answers · asked by onetreehunny 4 in Biology

2007-10-19 16:04:14 · 4 answers · asked by madushanka 1 in Physics