Science & Mathematics - 17 July 2007

So this is the problem... A basketball player hit 3 out of 7 shots. Approximatately, what percent (to the nearest percent) of the 7 shots taken did the player hit? plz tell me how to do it

2007-07-17 10:56:08 · 6 answers · asked by Anonymous in Mathematics

A few questions on planets answer in what ever you think is right.

1.What do you think is the most interesting planet?
2.If you could live on one planet which one would it be?
3.If people where from a planet where would you be from?

2007-07-17 10:49:04 · 23 answers · asked by paulalankelly07 1 in Astronomy & Space

I read this from www.purehealthpatch.com (under the research section....)
"Cell phones damage DNA. Aulterra research demonstrated that cell phone radiation causes a characteristic change in the shape of the DNA helix as measured with a photometer. This effect was repeated and confirmed using cell phones from different manufacturers. Similar effects were seen whether the phone was actively transmitting or in standby mode."

"Cell phones disrupt the bioelectricity in the body which can be measured by several devices which apply a weak current to the body and measure the immediate response. "

"Cell phones increase the temperature of the brain as measured using thermography"

Sounds very scary to me....since I let my children use cell phones :(

2007-07-17 10:48:34 · 6 answers · asked by billyboblee 1 in Biology

2007-07-17 10:41:59 · 5 answers · asked by lord_andys_new_id 1 in Chemistry

2007-07-17 10:30:29 · 6 answers · asked by dani b 2 in Zoology

2007-07-17 10:28:43 · 10 answers · asked by Anonymous in Mathematics

Please answer as SIMPLEST as possible!

2007-07-17 10:28:10 · 2 answers · asked by Anonymous in Physics

What is the practical purpose of vectors within crystal unit cells? What information do they provide and how is the formula writtien for them? Do vectors alo relate to moving from one unit cell to another? I am new to this stuff so basic responses would be appreciated.

2007-07-17 10:22:59 · 2 answers · asked by Gideon 1 in Physics

2007-07-17 10:22:11 · 5 answers · asked by Philo 2 in Zoology

A florist has to make a floral arrangement. She has 6 banksias, 5 wattles and 4 waratahs. All the flowers of each kind are different. In how many ways can the florist make a bunch of 10 flowers if she has to use at least 3 of each kind?

2007-07-17 10:17:16 · 2 answers · asked by micky m 2 in Mathematics

im a senior in Highschool, and i don't know exactly what to major in, i know i want to work in either Physics or Chemistry, and at one point own a business, like a R&D firm if possible, and i am stuck on a few things.

What should i major in?
should i go for a PhD (id like to) in that
should i get a Bachelors, then stop and start working on the business then return?

any advice is appreciated

2007-07-17 10:14:41 · 1 answers · asked by Anonymous in Other - Science

On what interval is the function f(x) = x^2 e^x concave downward?

2007-07-17 10:13:36 · 2 answers · asked by Anonymous in Mathematics

Prove the following theorem is true: “The diagonals of an isosceles trapezoid are congruent.”

http://s49.photobucket.com/albums/f283/mystalkingshadow/?action=view¤t=05_08h_06a.gif

Given:
Trapezoid EFGH with bases FG and EH
FE is congruent to GH

Prove:
EG is congruent to HF

I took a shot at this question and seemed to be wrong. My teacher left me this feedback and the answer I came up with had slim to no sense of the question. Mind helping?

INSTRUCTOR COMMENTS:

Hint. Use the distance formula to find the length of the diagonals FH and EG. ( See lesson 1.05 for help with the distance formula.) Then compare the lengths of EG and FH.

2007-07-17 10:08:39 · 3 answers · asked by Anonymous in Mathematics

2007-07-17 10:07:15 · 3 answers · asked by j@(08 1 in Mathematics

Evaluate the discriminant and select the choice that describes the nature of the roots of the equation.
x2-2x -2 =0

(a) real, rational, and unequal
(b) real, rational, and equal
(c) real, irrational, and unequal
(d) imaginary

2007-07-17 10:05:21 · 2 answers · asked by lushay 2 in Mathematics

i'm no expert on string theory, but as far as i know strings are made from energy. well, assume all the energy in a given object was somehow removed. perhaps by reaching absolute zero, would that object disappear?

2007-07-17 10:04:00 · 3 answers · asked by marcin p 1 in Physics

I know that the gravity of the sun and moon cause the tides, the energy that is required to cause the tides must be taken from some where else, where is it? Is it lost from the sun and moon some how? I'm thinking maybe the moons revolution around the earth is slowing or something like that. What about the sun? Thanks for any answers.

2007-07-17 10:00:16 · 9 answers · asked by lsinfield2000 2 in Astronomy & Space

Sean went on a cruise. His ship traveled 275 miles with the current in the same amount of time it traveled 175 miles against the current. the speed of the current was 10mph. what was the speed of the cruise ship as it traveled with the current.

2007-07-17 09:58:41 · 5 answers · asked by rex q 1 in Mathematics

2007-07-17 09:54:57 · 4 answers · asked by Julia L 1 in Biology

My cousin recently took a test, and her answers seem correct to me but she was still marked off, can you guys help out?

A physics book is moving across a table. Can the book have a constant speed and a changing velocity? What about a constant velocity and a changing speed? Explain your answers.

2007-07-17 09:52:59 · 7 answers · asked by siiimonnn 2 in Physics

Find equations of the tangent lines to the curve below that are parallel to the line x - 2y = 2.

y = (x-1)/(x+1)

y = (smaller y-intercept)
y = (larger y-intercept)

2007-07-17 09:51:39 · 2 answers · asked by Anonymous in Mathematics

Please explain it as simple as possible. No stupid answers please!

2007-07-17 09:47:15 · 3 answers · asked by Anonymous in Physics

a) specialized sensory organs
b) wings
c) high reproductive capacity
d) aquatic habitat
e) small body size


--[I'm leaning towards D, but I'm afraid it's one of those trick questions! what do you all think?]

2007-07-17 09:44:22 · 5 answers · asked by Anonymous in Biology

i want to buy a generator for my travel trailer but dont know how much wattage i need, it has a new 110 refridgerator and a new ac also 110 and of course lights and 2 tvs with dvd players, i plug into 30 amps at the rv parks and seem ok but i want to buy a generator in case i cant get to an rv park,,all the generators i see say wattage on them, so how big do i go,, thanks everybody

2007-07-17 09:39:10 · 6 answers · asked by Anonymous in Other - Science

1.) Given f(x)=l3x-6l, find(0)-f(3)

2.) given g(x+deltax)-g(x) / delta x for g(x)=x^2=3x-1

3.)Which of the following equations expresses y as a function of x?

Choices
A.) 3y+2x-9=17
B.) 2x^2 (y)+x=4y
C.)Both a and b
D.) Neither and a b
E.) 3y^2 -x^2=5

2007-07-17 09:38:46 · 2 answers · asked by Anonymous in Mathematics

somehow either stop it or considerably slow it down. maybe doubling or tripling our lifespan? with the speed of science and technology.seems this is quite possible.

2007-07-17 09:37:09 · 11 answers · asked by ducaticanine 1 in Biology

Please let me know if the following is correct, or where I am making invalid assumptions:

1. Larger (by piston volume) piston engines are always less fuel efficient than smaller engines of the same design.

2. The reason larger piston engines are less efficient is that larger pistons (and related mechanisms) sweep larger surface areas and therefore have higher friction loses throughout their cycle.

3. For a given piston volume forced induction will always provide more power per unit volume, all else held constant.

4. Therefore, forced induction engines can always be more fuel efficient than naturally-aspirated engines that are capable of the same power levels.

2007-07-17 09:36:42 · 3 answers · asked by David B 2 in Physics

In Triangle A B C., angle C is (8x+4) degrees and segment AB = (6x+2)mm.
Part a. What value of x would make Triangle A B C.equilateral?
Part b. What is the perimeter or sum of the lengths of the sides of the equilateral triangle? Be sure to include the unit of measure in your solution.

2007-07-17 09:33:54 · 3 answers · asked by Triock91 1 in Mathematics

2007-07-17 09:32:27 · 16 answers · asked by Cookie 1 in Zoology

Write the perimeter of the rectangle as a simplified polynomial. Then factor this polynomial completely.

54x2


6x3 + 120x

12(x2 + 5)(x + 4)
12x(x + 5)(x + 4)
6x(x + 20)(x + 9)
6x2(x + 5)(x + 4)

2007-07-17 09:31:47 · 2 answers · asked by Anonymous in Mathematics