Science & Mathematics - 31 December 2007

Solve.
-2(x-3)=-3(-8)

2007-12-31 10:12:55 · 15 answers · asked by jessika 4 in Mathematics

to be tested for mad cow disease? what were hte test results?
This was in 2001

2007-12-31 10:11:32 · 2 answers · asked by S i r i 1 in Zoology

Find dy/dx.
y = x^3(2x - 7)^4

2007-12-31 10:06:21 · 3 answers · asked by spksccrchica216 1 in Mathematics

find the solution set in a+bi form: x^2 +6x +12 =0
you dont have to show the work because i have the answer i just wanna check it.., thanks -D

2007-12-31 10:06:07 · 3 answers · asked by luhb u much!! 4 in Mathematics

Suppose you are rotating a ball attached to a string in a circle. If you allow the string to wrap around your finger, does the rotational velocity of the ball change as the string shortens?

PICK ONE:

Yes, the rotational velocity decreases because you decrease the rotational inertia.
Yes, the rotational velocity increases because you decrease the rotational inertia.
No, the rotational velocity of the ball does not change because the angular acceleration is constant.

2007-12-31 10:05:04 · 2 answers · asked by Anonymous in Physics

If a cannon ball and a bullet are shot going the same speed which will go the longest distance.

P.s. They dont weigh the same.

2007-12-31 10:05:01 · 4 answers · asked by Anonymous in Physics

this problem is based on pythagorean theorem.. which i don't get at all... :(

1. Gulido Palumbo is a Venetian gonodolier. Gulido needs to know how deep it is in front of his pier. he notices a water lily sticking straight up from the water with the blossom 18 cm above the surface. Gulido then pulls the lily to one side, keepin the stem straight, untill the blossom touches the water at spot 36 cm from where the stem first broke the surface. from this data, Gulido is able to calculate the depth of the water.

a. what is the depth of the water?

b. if the lily was only 12 cm from the water when sticking straight up and the depth of the water has not changed, what would tbe the distance when Gulido pulls the lily untill the blossom touches the water?

2007-12-31 10:04:37 · 3 answers · asked by hey 3 in Mathematics

2007-12-31 10:01:38 · 9 answers · asked by Damian M 1 in Mathematics

How would you solve this problem using 2 equations with 2 variables?

Loren's marble jar contains plain marbles and colored marbles. If there are 32 more plain marbles than colored marbles and there are 180 marbles in the jar, how many colored marbles does Lauren have?

2007-12-31 09:59:11 · 3 answers · asked by San Fran Kid 2 in Mathematics

also, how come some are over a hundred dollars and some are around $15?

2007-12-31 09:58:54 · 16 answers · asked by Anonymous in Mathematics

2007-12-31 09:56:04 · 4 answers · asked by Anonymous in Geography

A child on a freely rotating merry-go-round moves from near the center to the edge. Will the rotational velocity of the merry-go-round increase, decrease, or not change at all?

PICK ONE:

The rotational velocity must decrease to conserve angular momentum because the rotational inertia of the merry-go-round will be greater with the child near the edge.

The rotational velocity must increase to conserve angular momentum because the rotational inertia of the merry-go-round will be less with the child near the edge.


The rotational velocity will not change because there is no change in the mass or the angular momentum of the merry-go-round.

2007-12-31 09:55:32 · 2 answers · asked by shamsan_415 1 in Physics

Pick one of the following:

Yes, angular momentum is always conserved for any system.
No, angular momentum is only conserved when there is no net torque.
No, angular momentum is only conserved when the angular acceleration is constant.

2007-12-31 09:53:57 · 2 answers · asked by shamsan_415 1 in Physics

what is the equation for the axis of symmetry? there is an equation, which may be -b/2a, but I'm not sure

but i have the graph of -x^2+9 and another graph after a translation of 7,0

thanks!

2007-12-31 09:53:45 · 2 answers · asked by Anonymous in Mathematics

where is the central time ball drop

2007-12-31 09:53:27 · 8 answers · asked by Anonymous in Physics

Imagine. What would the world look like, what would we look like?

2007-12-31 09:51:45 · 5 answers · asked by Leo 3 in Other - Science

2007-12-31 09:51:42 · 3 answers · asked by Handsome is as handsome does 3 in Weather

2007-12-31 09:50:14 · 3 answers · asked by birmingham927 2 in Mathematics

If the space between outer ring of the atmospere and the surface of the earth is getting less, the sun penetrates quicker.

2007-12-31 09:44:47 · 5 answers · asked by Magpie 1 in Weather

1. 55,50,60,55,65,60,__,_,_,_
2. 11,13,15,17,_,_,_

2007-12-31 09:44:14 · 29 answers · asked by Anonymous in Mathematics

i no that the earth starts at that spot in the solar system and finishes at that spot a year later but y couldnt april 1st be it cuz there would basically b the same out come

2007-12-31 09:43:25 · 6 answers · asked by daman 1 in Weather

my dad took a picture of the sun and it has alittle planet next to it. he says it is planet x. does anyone else belive this?

2007-12-31 09:43:23 · 9 answers · asked by Briana 1 in Astronomy & Space

Silver ions can be precipitated from aqueous solutions by the addition of aqueous chloride:
Ag+(aq) + Cl- (aq) -> AgCl(s)

Silver Chloride is virtually insoluble in water so that the reaction appears to go to completion. How many grams of solid NaCl must be added to 25 mL or 0.366Mol AgNO3 solution to completely precipitate the silver?

2007-12-31 09:42:50 · 2 answers · asked by Anonymous in Chemistry

mine are dolphins. plz answer and tell me why!

2007-12-31 09:41:06 · 14 answers · asked by Robyn F. 2 in Zoology

What's..
0^0
0^1
2^0
3^0
4^1

2007-12-31 09:40:48 · 8 answers · asked by nightowl 2 in Mathematics

2007-12-31 09:39:03 · 14 answers · asked by Shamaya M 1 in Mathematics

Gas stove burners are rated in BTU; electric burners in W. I can convert watts to BTU/hr, or BTU to kWh. They have different dimensions.

When they tell me a burner is 10,000 BTU, I wonder - is that if it's left on for an hour? That seems to be the only way to make the units match.

2007-12-31 09:38:25 · 5 answers · asked by Ray W 3 in Engineering

From a"string theory" student - “The beauty and complexity of the mathematical calculations necessary to explore the extra dimensions of string theory lured a lot of our most brilliant and gifted students to work for many years only to find that they had invested their time unwisely. Rather than admit their mistake, some like Motl will do anything to keep this dogma a science. Something it has not been for a long time”.."Like a 50-year-old woman wearing way too much lipstick," jokes Robert B. Laughlin, a Nobel Prize-winning physicist at Stanford. "People have been changing string theory in wild ways because it has never worked.".."Superstringers have now created a culture in physics departments that is openly disdainful of experiments"says physicist Zlatko Tesanovic of Johns Hopkins University.."it's my impression that more and more physicists are starting to join Krauss as 'skeptical agnostics' about string theory," said mathematician Peter Woit of Columbia University.

2007-12-31 09:35:15 · 8 answers · asked by Archie P 1 in Astronomy & Space

is there an island were the timezone goes down the middle of that island seperating two different days

2007-12-31 09:34:12 · 4 answers · asked by Dh H 1 in Geography

2007-12-31 09:32:15 · 4 answers · asked by who? 1 in Chemistry