Science & Mathematics - 21 October 2007

2007-10-21 07:03:49 · 8 answers · asked by robert p 1 in Mathematics

I really need to know what it is because i have a rock project and some websites say its a mineral, but mineral data sites do not recognize it as a mineral.....so....i need help. Thanks.

2007-10-21 07:00:34 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-21 06:58:33 · 6 answers · asked by intellectualdesert 1 in Astronomy & Space

Biology help please.

2007-10-21 06:56:34 · 6 answers · asked by Anonymous in Biology

in comparison to sucrose, glacatose, and startch, why does glucose ferment the best?

please help me im lost! =)

2007-10-21 06:54:31 · 2 answers · asked by jackie.330 2 in Biology

2007-10-21 06:52:41 · 5 answers · asked by Anonymous in Mathematics

How could a fire affect the atmosphere, geosphere, hydrosphere, and the biosphere. And (optional) how could each effect on each spheres also affect the other spheres?

2007-10-21 06:52:00 · 1 answers · asked by voteforeminem 1 in Earth Sciences & Geology

2007-10-21 06:48:40 · 1 answers · asked by Anonymous in Mathematics

2007-10-21 06:44:50 · 3 answers · asked by Anonymous in Mathematics

2007-10-21 06:44:16 · 2 answers · asked by Anonymous in Mathematics

2007-10-21 06:43:36 · 4 answers · asked by Anonymous in Mathematics

can someone help me answer this for my lab:

2.The pit in the top of the mountain on the model must be shown on a flat map as a depression and not as a hilltop. What method might be used to show that the contours in the pit really do suggest a depression?

3.A view from directly above shows that when a contour line crosses a gulley on a mountain, it changes direction suddenly. The contour line is somewhat V-shaped. Does the “V” point toward the top of the mountain or toward the valley?

This is for my science lab. Please help me!

2007-10-21 06:43:12 · 2 answers · asked by Anonymous in Earth Sciences & Geology

A linear pair is two angles whose sum is 180 degrees.

2007-10-21 06:42:29 · 2 answers · asked by Anonymous in Mathematics

2007-10-21 06:40:09 · 2 answers · asked by Anonymous in Mathematics

the equation is cos(x+1) + 1 = sin(xy²)
the x-coordinate is 2 and the y-coordinate is 1.8.

1) find the slope of the tangent line.
2) give an equation of the tangent line and solve it for y.

2007-10-21 06:30:52 · 3 answers · asked by guitarsnbooze3 2 in Mathematics

we wouldn't even have to use shuttles, we could use paris guns to launch it.

2007-10-21 06:28:47 · 11 answers · asked by Anonymous in Astronomy & Space

2007-10-21 06:28:20 · 2 answers · asked by Benjamin R 1 in Mathematics

100 pennies are on a table, and exactly 10 are tails. With
your eyes closed, separate them into two groups so that
each group has the same number of tails. Her answer is to
take any 10 pennies and turn them over; that is group 1,
and it has the same number of tails as the remaining 90.

Why does this answer work?

2007-10-21 06:27:52 · 4 answers · asked by Gloria 2 in Mathematics

A 2kg object is moving across a table at a speed of 2.0 m/s againt a force of friction of 6.0 n. The applied force is suddenly increased by 1.0n. How fast will oject be moving after 3.0s

2007-10-21 06:27:09 · 2 answers · asked by Anonymous in Physics

Given are the following answers pick the correct one
A)y=-5x*2 B)y=5 C)y=x D)y=5x

2007-10-21 06:26:46 · 3 answers · asked by Anonymous in Mathematics

When dealing with linear relationships, what are the advantages of using a standard form for an equation. We are studying point-slope, standard form, and explicit and recursive. We are expected to be able to convert each of them. I'm just unsure of the advantages for using each one.

2007-10-21 06:24:14 · 2 answers · asked by Anonymous in Mathematics

For some reason I have 14 oranelles labeled for a plant cell.
why is that??

2007-10-21 06:23:29 · 4 answers · asked by Mercedes16_90!! 1 in Biology

1.Match the expression with the word phrase:
4 times a number.

4 + n

n ÷ 4

4 – n

4n
2. Match the expression with the word phrase:
The budget is divided into 5 parts.

b + 5

b ÷ 5

b – 5

5b

3. Evaluate the Algebraic Expression, 12 ÷ x when x = 3

4

9

15

36

2007-10-21 06:21:50 · 11 answers · asked by Anonymous in Mathematics

what biological significance does this have for a panting animal?

2007-10-21 06:20:25 · 5 answers · asked by nothingspecial 1 in Biology

The answer is three of course, but I don't know whether to say 3 units squared, or 3 square units, or just 3, or something else... It would be much easier if it were in cm, (then it would be cm squared), but it doesn't give you a specific unit...?

2007-10-21 06:19:15 · 9 answers · asked by Parking Lot 1 in Mathematics

2007-10-21 06:17:55 · 17 answers · asked by ? 3 in Mathematics

2007-10-21 06:17:50 · 2 answers · asked by medhini_igoor 1 in Mathematics

Check whether the ordered pair (5,6) is a solution of the system.

-2x+4y=-14
3x+y=21



Please explain in easy steps.
Thank you for your time!

2007-10-21 06:15:31 · 6 answers · asked by Jessie 1 in Mathematics

1. Evaluate the Algebraic Expression, 9 + 6x ÷ 3 when x = 5

13

19

25

33
2. Evaluate the Algebraic Expression, (7 – x) + 2x2 when x = 3

16

22

36

54
3. Evaluate the Algebraic Expression, 6ab + 2 when a = 2 and b = 3

13

18

32

38

2007-10-21 06:15:26 · 7 answers · asked by Anonymous in Mathematics

To pull a 50kg crate across a frictionless floor a worker applies a force of 210N, directed at 20 degrees above the horizontal. As the crate moves 3m, what work is done on the crate by...
(a) the workers force
(b) the weight of the crate
(c) the normal force exerted by the floor on the crate
(d) total work done on the crate

i have letter (d) is it w=(210N)(3) (cos20) right? or is that for (a)?
also, is the nornal force 9.81*50kg

2007-10-21 06:15:18 · 2 answers · asked by silyrabbittwixR4kidz 3 in Physics