Science & Mathematics - 18 July 2007

The question of how certain people can detect underground drinking water using just a simple forked stick has fascinated me for a long time. Is there any scientific explanation for how this works?

2007-07-18 03:58:27 · 16 answers · asked by captbullshot 5 in Parapsychology

I realise that plants are a high % water (which is of course added through rain/watering), but how do plants develop so much plant matter from so little soil? Where does the mass come from, as the soil never reduces? A fuschia in my garden has a tiny pot with very little soil, but has developed a space-hopper sized amount of foliage...where does it come from?!!

2007-07-18 03:57:05 · 5 answers · asked by examino 2 in Botany

This is ahypothetical question? Please enumerate the answer in layman terms

2007-07-18 03:55:52 · 3 answers · asked by J K 1 in Physics

/ stands for square root... product of square root of x times square root of x squared???

2007-07-18 03:55:45 · 7 answers · asked by Anonymous in Mathematics

and what comes after billion, and how many billions are in that. What comes after that, ect.

Please list as much as you can.

2007-07-18 03:55:03 · 13 answers · asked by Anonymous in Mathematics

2007-07-18 03:53:41 · 16 answers · asked by J-x 1 in Physics

Factor

2007-07-18 03:50:08 · 6 answers · asked by Anonymous in Mathematics

2007-07-18 03:49:52 · 6 answers · asked by raed_h 1 in Astronomy & Space

The latent heat of fusion (solid become liquid) for ice is 79.8 cal/gram. How much ice can we melt with 1000 calories of heat?
(a)Read the introduction carefully. Identify the key pieces of information required to solve this problem.
(b)Identify the extraneous information in the background reading
c) Explain your strategy for solving this problem.
(d)Solve the problem. How much ice can you melt with 1000 calories of heat?
Hints:

The formula is:
The amount of heat = (mass of the material) x (latent heat of fusion):
Q = mLf
where Q is the amount of heat in calories;
m is the mass of the material in grams;
Lf is the latent heat of fusion in calories/gram.

In this problem, you are provided the amount of heat, Q, and the latent heat of fusion, Lf. You will have to rearrange this equation and solve it for mass, m.

Which would require more heat, melting 500 g of 0 C ice or turning 500 g of 100 C water into steam?
A 500 g sample of an unknown material requires 750 calories of heat to raise its temperature by 50 C. Use Equation (1) and Table 6.1 to identify the material.The formula used to calculate the amount of heat required to heat the material without phase change is:

Amount of heat required = (specific heat capacity) x (mass of the material) x (change in temperature)

or

Q = C * m * ∆T

where C is the specific heat capacity of the material in cal/g 0C;
m is the mass of the material in grams;
∆T is the temperature change, 0C.

2007-07-18 03:49:43 · 1 answers · asked by deebeals 1 in Other - Science

2007-07-18 03:48:07 · 3 answers · asked by Anonymous in Weather

I have no idea bout this..

2007-07-18 03:47:17 · 14 answers · asked by AriANe 1 in Biology

If so what precautions are in place.

2007-07-18 03:43:41 · 9 answers · asked by JOHN M 3 in Astronomy & Space

2007-07-18 03:41:21 · 6 answers · asked by ??unknown?? 1 in Chemistry

2007-07-18 03:31:35 · 2 answers · asked by ??unknown?? 1 in Earth Sciences & Geology

What lies beyond any known and unknown existence?

2007-07-18 03:27:34 · 12 answers · asked by HandG 2 in Astronomy & Space

a) its velocity is doubled?
b) its velocity is tripled?
c) its mass were doubled?
d) both its velocity were doubled and its mass were doubled?

2007-07-18 03:24:31 · 4 answers · asked by abyy 1 in Physics

i need it for school right now asap!!!!

2007-07-18 03:22:17 · 4 answers · asked by Mrs. I love Harry Potter 2 in Weather

2007-07-18 03:21:10 · 4 answers · asked by Anonymous in Mathematics

2007-07-18 03:19:57 · 18 answers · asked by tracyterry 3 in Zoology

2007-07-18 03:13:39 · 12 answers · asked by Nonaya 1 in Mathematics

suppose I got a gas which has a break down voltage of 40000V at 1 inch. Now suppose i have two plates facing each other one is at 25000v other is neutral and they are at 1 inch away. Now suppose the neutral plate gas induced with 20000v (not 25000 because of the distance factor). The gas will reach its break down voltage and charge will leak...right?

Now suppose i increase the distance to 2 inch....and still i have 25000v in one plate. now will the induced charge on the neutral plate will become 10000v?...and also for that distance will the breakdown voltage increase to double...that is 40000v?

2007-07-18 03:04:40 · 1 answers · asked by Anonymous in Physics

I have a summer hw, i don't know how to do this problem and i have to do 7 like it .. plz explain this to me so i can do the others.
A parametrization is given for a curve.
(a) what are the initial and terminal points, if any? Indicate the direction in which the curve is traced.
(b) Find a Cartesian equation for a curve that contains the parametrized curve. What portion of the graph of the Cartesian equation is traced by the parametrized curve ?
Is it right that the initial point is (1,0) and the terminal point is (-1,0)??
and i also have to graph it, i can do that by using a grapher but is there a way that i can do it without a grapher ??
Thanks soooooooo much

2007-07-18 03:00:59 · 3 answers · asked by thatisme 2 in Mathematics

2007-07-18 02:59:28 · 16 answers · asked by mysharona36 1 in Zoology

if 2 is next to 1
three is next to two
iv is next to iii
evif is next to ruof
.........
jack is next to 10 of (spades, hearts...)
black is next to_______?

2007-07-18 02:54:09 · 8 answers · asked by dee j 2 in Mathematics

2007-07-18 02:52:16 · 3 answers · asked by conmenot 1 in Mathematics

My grandmother mixed Ammonia with Bleach one day and it literally created a miniature explosion.

Obviously this occured due to acid-base neutralization, but would it also occur if Orange juice was substituted for the Ammonia?

2007-07-18 02:50:36 · 2 answers · asked by βread⊆ℜumbs™ 5 in Chemistry

2007-07-18 02:49:48 · 17 answers · asked by rachna gupta 1 in Botany

what gas is produced when a mosquito coil is lighted?
is it carbon dioxide?

2007-07-18 02:47:22 · 2 answers · asked by christine 2 in Chemistry

2007-07-18 02:43:12 · 5 answers · asked by KAYE L 1 in Medicine

Could you let me know the Website/Contact No./E-Mail ID of the college BABU BANARSI DAS INSTITUTION OF ENGINEERING TECHNOLOGY AND RESEARCH, BULANDSHAR ?

2007-07-18 02:41:52 · 2 answers · asked by am 1 in Engineering