Science & Mathematics - 30 October 2007

im having trouble with this so please explain it to me

a cat ran the distance (d) over a period of time (t) .
if the cat's kinetic energy was (j) whats the formula to find the cat's mass ?

2007-10-30 05:35:46 · 5 answers · asked by Anonymous in Physics

2007-10-30 05:34:07 · 15 answers · asked by Nat 1 in Zoology

Let alpha and beta be two angles in a right triangle (niether alpha and beta is the right angle. Is it possible to have alpha + Beta(7)= 30degrees? Can you explain it to me, beta is multiplied by seven if it not clear.

2007-10-30 05:33:06 · 5 answers · asked by Anonymous in Mathematics

2007-10-30 05:31:46 · 5 answers · asked by krstilyzed 1 in Physics

1m cubed of a field gets about 1050Mj of light energy per year.

only 21 500kJ of energy is stored in the new grass.

(i) How is the energy stored in the new grass?

...............................................................................

(ii) What is the % of light energy stored in the grass?

...........................................................................................................................................................................

2007-10-30 05:29:34 · 6 answers · asked by Nat 1 in Mathematics

When a 2-dimensional cone passes through a 2-dimensional plane, the result is a single expanding circle. So, here's my question: Will a 3-dimensional cone passing through a 3-dimential space result in a 3-dimensional expanding "universe"?

2007-10-30 05:21:54 · 2 answers · asked by I'm an Atheist 3 in Physics

2007-10-30 05:21:02 · 15 answers · asked by Anonymous in Paranormal Phenomena

This problem is, in my opinion, interesting.

Let (a_n) be a nonincreasing sequence of nonnegative numbers such that sum(a_k, k=1..+oo) <+oo. Let S denote the set of all numbers which are sums of subseries of sum(a_k,k=1..+oo). Prove that S is an interval if, and only if, for each natural n, a_n <= sum(a_k,k=n+1..+oo).

2007-10-30 05:18:18 · 3 answers · asked by Steiner 7 in Mathematics

No more rain and then..............?

Yeah so, finish it. Whats then ending?

2007-10-30 05:18:13 · 4 answers · asked by Anonymous in Weather

2007-10-30 05:17:27 · 6 answers · asked by sillyputty13 1 in Chemistry

imm in science class and me and my partner need to find a good esp movie so please help us..:]

2007-10-30 05:17:23 · 7 answers · asked by Victoria H 1 in Parapsychology

i'm doing this 4 a project, but i want your opinion on who owns the arctic: canada, usa (via alaska), denmark (via greenland), or russia.

2007-10-30 05:13:50 · 6 answers · asked by Anonymous in Geography

please kindly help me....any method can be used.....i just dont get the right answer...please help me....

1.(3x-2y+1)dx+(3x-2y+3)dy=0
ans. 5(x+y+c)=2 ln(15x-10y+11)

2.dy/dx =(9x+4y+1)^2
ans. 3 tan(6x+c)=2(9x+4y+1)

3.(3siny-5x)dx+2x^2cotydy=0
ans. x^3(sin y-x)^2=2y+c

4.(x^2+6y^2)dx-4xydy=0,x=1,y=1
ans.2y^2=x^2(3x-1)


please help me....thank you very much !

2007-10-30 05:10:56 · 1 answers · asked by ice_cream_chico 1 in Mathematics

Simplify M^2/3 divided by M^1/5

The square root of (2x+4) +1 is greater than or equal to 5
****square root bar is only over 2x+4****

2007-10-30 05:06:59 · 6 answers · asked by ehrlich 6 in Mathematics

2007-10-30 05:06:53 · 1 answers · asked by Shawna 1 in Physics

this is to find slope and what not needed for tomorro including others

2007-10-30 05:05:17 · 2 answers · asked by charlie 1 in Mathematics

your told f(x)= 2x/3-5 g(x)=x/2+3

now am told to find for these ones:
(a) fg(x)
(b) gf(10)
(c) gf(x)

2007-10-30 05:04:07 · 2 answers · asked by Anonymous in Mathematics

hie guys im studying medical physics and i would need your help on a certain question .

Q: Describe the energy changes that occur in the stages of x-ray production and use .

2007-10-30 05:03:24 · 4 answers · asked by gina 2 in Physics

What is the equation of the function, g(x),
and

Modify y=f(x)=x^2(-8)

2007-10-30 04:55:13 · 2 answers · asked by yuleydis77 1 in Mathematics

2007-10-30 04:52:26 · 13 answers · asked by donovan t 1 in Biology

2007-10-30 04:52:03 · 7 answers · asked by foxfoxcar 1 in Biology

Read this link.............. http://science.howstuffworks.com/parallel-universe.htm

2007-10-30 04:50:38 · 7 answers · asked by yo mamma 3 in Astronomy & Space

Evaluate the numerical terms. {2 X} exponent of -2 / {3X} exponent of -1. The answer should look something like this in this form 4/ 2x+3 or something. The answer should be in the same form as the question.

2007-10-30 04:50:27 · 2 answers · asked by ilovedstny 1 in Mathematics

I mean will it crash or is it in a permanent orbit etc

2007-10-30 04:49:49 · 11 answers · asked by Anonymous in Astronomy & Space

Can you force evolution or is it merely adaptation? What kind of time time table to you think would be needed depending on how grand of a scale you are thinking? Such as will it take another million years before we stop getting goose bumps when we are scared? Can we teach ourselves these types of things or do our bodies and minds just take over and we have no control?

2007-10-30 04:47:54 · 5 answers · asked by Drew 3 in Biology

A rotating star collapses under the influence of gravitational forces to form a pulsar. The radius of the star after collapse is 1 10-4 times the radius before collapse. There is no change in mass. In both cases the mass of the star is uniformly distributed in a spherical shape.
(a) What is the ratio of the angular momentum of the star after collapse to before collapse?


(b) What is the ratio of the angular velocity of the star after collapse to before collapse?


(c) What is the ratio of the rotational kinetic energy of the star after collapse to before collapse?


(d) If the period of the star's rotation before collapse is 5.00 107 s, what is its period after collapse?

2007-10-30 04:46:28 · 2 answers · asked by sportzblock 1 in Physics

2007-10-30 04:44:15 · 5 answers · asked by vishal p 2 in Mathematics

It is true that Q(x)=x^5+x^3+x is a one to one function whose domain and range are all numbers.

Suppose that R is the function inverse to Q, There is no simpe algebraic way to compute values of R. compute R(3), R'(3), and R''(3).

Ok so I found the inverse but what do I do from here?

There's a hint and it says Q(R(x))=x and R(Q(x))=x. So fund an input to Q which will "output" 3. Then differentiate one of the equations, maybe more than once.

I'm really confused about what to do. If someone could explain I'd greatly appreciate it! Thanks.

2007-10-30 04:42:03 · 2 answers · asked by Anonymous in Mathematics

then how come only apes evolved into another species? How come horses, hippos, giraffes, whales, etc haven't changed?

2007-10-30 04:40:57 · 22 answers · asked by SLF 6 in Biology

Is this an example of scientific notation: 16.93 x 10 ?
If not, rewrite in scientific notation.

2007-10-30 04:39:32 · 4 answers · asked by tuntuni11 1 in Mathematics