Science & Mathematics - 1 October 2007

Im finding a perennial plant which is easy to maintain because I live in zone 8 and a kind of plant that has flowers and grows really short. I think Vinca Minor is a candidate.

2007-10-01 23:56:16 · 4 answers · asked by defoe_ta 1 in Botany

As water has the anomolous behaviour after 4 degree celsius!.
There is another element a metal which has the same behaviour. please let me know which metal is that?

2007-10-01 23:54:22 · 2 answers · asked by Anonymous in Chemistry

2007-10-01 23:52:05 · 9 answers · asked by SOSme 1 in Mathematics

This feels like something I should know, but am just too stupid to remember. Can someone here help me out?

I am not looking for Newton's second law of f=ma. Instead what I want is if given one objects velocity and mass, what is the force that it applies to another object that it collides with (eg a rock with a known mass and final velocity impacts the ground, what is the force it hit's the Earth with?).

2007-10-01 23:40:35 · 6 answers · asked by Mat of the RSPSOA 7 in Physics

I need to create a curtain of mist, whether it be water or carbon dioxide. if it is water, it should be superfine so as not to wetr the floor.

2007-10-01 23:39:41 · 3 answers · asked by THOR 1 in Physics

In about 500 words pls. explain what is Dark Matter in the most simplest form in the Undergraduate level.

2007-10-01 23:36:21 · 7 answers · asked by bazoomber 2 in Astronomy & Space

2007-10-01 23:36:02 · 3 answers · asked by george 1 in Mathematics

High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen.

Determine the weight percent of Cl that must be added if this substitution occurs for 4% of all the original hydrogen atoms.

Express your answer with one decimal digit.

thanks, working out plz

2007-10-01 23:35:59 · 1 answers · asked by okooko 3 in Chemistry

After someone answers wouldn't it be so much easier if there was a respond to answer option?

2007-10-01 23:34:00 · 7 answers · asked by flugy98765 2 in Physics

determine, by considering the discriminant, the number of points of intersection with the x axis of the following parabolas

1)y=x^2-7x+3

2)y=5-7x-2x^2

3)y=3x+2x^2

2007-10-01 23:21:33 · 3 answers · asked by Anonymous in Mathematics

Why do hurricanes/cyclones emerging from the seas always move towards the gulf of the nearby coast while crossing the coast. ??

2007-10-01 23:16:34 · 3 answers · asked by nobelprize_geetha 1 in Geography

If in the point were bigbang originated many elements was formed, that all compose our universe.Im sure these elements also be found at any point here in this infinite space.So is it possible that there is interaction of different elements with our expanding universe to cause massive collision,and explosion at any time?

2007-10-01 22:59:33 · 7 answers · asked by Marlou G 1 in Astronomy & Space

Most of you take the obvious answer yes BUT i only want people who know the right answer to give an answer because believe it or not glass doesnt have a definate shape and is considured to many the slowest moving liquid, if you have windows that are decades old feel both sides of the top with both ands and move your way down, it will get fatter as you go down meaning it flowed down over time. But ive heard that a liquid also has to flow at a certain pace in order to be a liquid. If you didnt know glass didnt have a permanent definate shape that could change with no interferance then you just learned somthing from a person asking you a question :)

2007-10-01 22:39:46 · 10 answers · asked by flugy98765 2 in Physics

hi i m ashish sharma doing aircrft engineering
is there any way we can use drag force to produce electricity
while da a/c is flying as d afriction can be used to produce electricitu so may be we can use drag......

2007-10-01 22:35:17 · 3 answers · asked by ansh 1 in Astronomy & Space

need help, when doing this shouldnt + come before - or don't this matter when multiplying?

2007-10-01 22:33:14 · 8 answers · asked by chas_lynn2002 2 in Mathematics

a. the sun's rays become intense and the surface warms up
b. the sun's rays become overhead and the surface gets colder
c. the sun's rays become diffuse and the surface gets warmer
d. the sun's rays become diffuse and overhead
e. the sun's rays become diffuse and the surface gets colder

i think its A or D

2007-10-01 22:27:22 · 3 answers · asked by bob 2 in Geography

Question:

P(5,0), Q(8,6), R(5,8), S(2,6). Find the area of the kite PQRS.


Pls. anwer it i need it right now please... please...

2007-10-01 22:24:09 · 4 answers · asked by Anonymous in Mathematics

Some says it is okay to burn leaves for leaves doesn't contain CFC which can cause damage to our ozone layer. But some says that it is not, because it cuses pollution. What do you think?

2007-10-01 22:22:49 · 4 answers · asked by cute-simple gal 1 in Botany

If I stick my arm out of my car window on the freeway on a Hot and Sunny day, does it slow down the rate im going to get tan? A lot?

2007-10-01 22:22:06 · 5 answers · asked by john m 2 in Other - Science

A crystal growth furnace is used in research to determine how best to manufacture crystals used in electronic components for the space shuttle. For proper growth of the crystal, the temperature must be controlled accurately by adjusting the input power. Suppose the relationship is given by:

T(w)= 0.1w^3+2.155w+20
where T is the temperature in degrees Celsius and w is the power input in watts:

a) how much power is needed to maintain the temperature at 200 degrees Celsius?

b) if the temperature is allowed to vary from 200 degrees Celsius by up to plus or minus 1 degree Celsius, what range of wattage is allowed for the input power?

c) in terms of the epsilon, delta definition of lim, as x approaches a, f(x)=L, what is x? what is f(x)? What is a? what is L? What value of epsilon is given? What is the corresponding value of delta?

2007-10-01 22:17:29 · 2 answers · asked by Anniepannie06 2 in Mathematics

1) Suppose that we have two events A and B with probabilities P(A)=.40 and P(B)=.60 and P(A intersect B)=.20. What is the conditional probability of P(B|A)?

2) Find the probability for P(X) U P(Xc) ?

3) We have a Venn Diagram with two events represented by sample space A and B, and these sets are: A={a,b,c,d} and B={a,a,d,d}
If we represent P(A) U P(B), we will highlight the area in the diagram where?

A) A and B share space and this area will include only a and d elements.
B) all of A and B's shared space and this area will include a, b, c, and d.
C) The area outside of A and B events and this area will include a, b, c, and d.
D) The area of A and B that is not shared and this area will include b and c.

Please explain the solving process.. Thank you.

2007-10-01 22:15:33 · 3 answers · asked by Diaus 2 in Mathematics

A resting adult requires about 240 mL of pure oxygen/min and breathes about 12 times every minute. If inhaled air contains 20% oxygen by volume and exhaled air 16%, what is the volume of air per breath? Assume that the volume of inhaled air is equal to that of exhaled air)

2007-10-01 21:47:52 · 4 answers · asked by Anonymous in Chemistry

A(-10,2), B (12,-4)

2007-10-01 21:44:14 · 3 answers · asked by Anonymous in Mathematics

I just posted the question, "if something is .89 (cents) per sqaure foot, & I bought 8 feet, how much will it cost?"
...this pond liner I need to by is 8 feet by 20 feet, and I forgot to mention that.

2007-10-01 21:37:23 · 3 answers · asked by Cheyenne 2 in Mathematics

2007-10-01 21:03:21 · 5 answers · asked by bramix 2 in Physics

2007-10-01 21:02:06 · 2 answers · asked by itai d 1 in Engineering

Please enter your answer as an ordered pair in the form (x, y).

2007-10-01 20:55:41 · 4 answers · asked by Anonymous in Mathematics

Please enter your answer as an ordered pair in the form (x, y).

2007-10-01 20:53:56 · 3 answers · asked by Anonymous in Mathematics

please I need it ASAP!!!!!

2007-10-01 20:38:34 · 2 answers · asked by klarizze a 1 in Earth Sciences & Geology

the numbers of the grades D,C,B and A in a class were consecutive integers. the number of D's was the same as the sum of one-third the number of A's and half the number of C's. how many students received a B

2007-10-01 20:29:42 · 1 answers · asked by carlos t 1 in Mathematics