Science & Mathematics - 4 September 2007

on a balance and a person lifting a heavy stone with a lever.

B. What is point of lever answer in terms of turning affect

2007-09-04 12:57:13 · 1 answers · asked by ????? ? 1 in Physics

A. Where must an object with a mass of 75 square nuts be placed to balance the stick?

B. If an object of mass m is added to the 200 square nuts at 9cm, the object with a mass of 75square nuts must be moved away from the fulcrum to maintain the balance, call the distance the object must be moved D. solve for D in terms of M.

2007-09-04 12:55:29 · 2 answers · asked by ????? ? 1 in Physics

The units digit of a two digit number is 2 more than 3 times the tens digit. When the digits are reversed, the new tens digit is 4 times the new units digit. Find the number and it's reversal.

2007-09-04 12:54:24 · 2 answers · asked by ALEX 1 in Mathematics

2007-09-04 12:51:23 · 6 answers · asked by Anonymous in Astronomy & Space

2007-09-04 12:38:07 · 4 answers · asked by bunjiz2003 2 in Earth Sciences & Geology

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching the first one, you throw a second one at a low angle and timed to arrive at your opponent before or at the same time as the first one. Assume both snowballs are thrown with a speed of 30.0 m/s. The first one is thrown at an angle of 75.0° with respect to the horizontal.

(b) How many seconds later should the second snowball be thrown if it is to land at the same time as the first?
s

2007-09-04 12:36:44 · 2 answers · asked by justin l 1 in Mathematics

Factor completly



1) 2y^3 -128

2) 2y^3 - 54z^3

2007-09-04 12:35:51 · 1 answers · asked by Aimee R 1 in Mathematics

and please if you can help me find a website that can teach you! thanz!

2007-09-04 12:34:00 · 5 answers · asked by Anonymous in Mathematics

what is the main component inside the air bubbles from boiling water?

2007-09-04 12:29:00 · 2 answers · asked by mwali02 2 in Chemistry

write an equation of the line passing through (1, 3) and parallel to 2x + 3y = -5

2007-09-04 12:23:40 · 2 answers · asked by smiley 1 in Mathematics

Should scientists consider morality during reasearch?

2007-09-04 12:22:07 · 5 answers · asked by ashj2011 2 in Earth Sciences & Geology

Or tell me where to find information about it?

2007-09-04 12:21:35 · 2 answers · asked by Philidor 5 in Weather

2007-09-04 12:17:23 · 1 answers · asked by CPUcate 6 in Mathematics

are these two things the same?

2007-09-04 12:13:56 · 12 answers · asked by computer whiz 5 in Mathematics

2007-09-04 12:12:10 · 5 answers · asked by Anonymous in Astronomy & Space

Use the methods of cyndrical shells to find the volume of the solid obtained by rotating the region bounded by the given curves about the x-axis.

x + y = 3 and x = 4 - (y -1)^2

2007-09-04 12:08:44 · 1 answers · asked by bdgurl5388 1 in Mathematics

its for class so if you could explain the process of how the answer is found that would be great.

2007-09-04 12:08:10 · 1 answers · asked by darkninjaneo 2 in Geography

Since mutations ocuur when a bacteria divides, it is safe to assume that in multicellular species when two cells undergo meiosis, mutations happen too. (If this statement is wrong, please point it out). And since most cells are completely functional without the rest of the body (provided their strata resembles the blood from its species), we can argue they have the ability to adapt to their sorroundings as independent species do (again, Im only assuming, so I may be wrong) by mutation and natural selection. Now, if these statements are true, body cells may evolve and make themselves fitter and therefore, making the individual healthier and less prone to dying from epidemics or poisoning.

Now, a second thought: isnt this process exactly what makes the ability to become somewhat more inmune to some poisons by injecting a growing dose of them gradually?

2007-09-04 12:01:53 · 4 answers · asked by Anonymous in Biology

And how big would a comet have to be in order to kill everything in the world?

2007-09-04 12:01:45 · 9 answers · asked by chelsearave 1 in Astronomy & Space

2007-09-04 12:01:25 · 5 answers · asked by JC 1 in Geography

Please help me to solve this question using substitution method. Thank you.

x/2+y/3=7
x/4-y/9=1

2007-09-04 11:59:35 · 4 answers · asked by AnswerGirl 2 in Mathematics

2007-09-04 11:58:40 · 1 answers · asked by allison g 3 in Mathematics

she is the 2nd indian to go on space ship

2007-09-04 11:58:08 · 2 answers · asked by krish c 1 in Astronomy & Space

energy cannot be converted from one form to another
kinetic energy is conserved
potential energy is conserved
none of the above

2007-09-04 11:57:48 · 11 answers · asked by notachemwiz 1 in Chemistry

The decomposition of N2O5(g) to NO2(g) and O2(g) obeys the first-order kinetics. Assuming the form of the rate law is
Rate = - D[N2O5] / Dt = k[N2O5]
where k = 3.4 x 10^-5s^-1 at 25°C.
What is the half-life for the reaction described?

2007-09-04 11:54:58 · 1 answers · asked by Anonymous in Chemistry

2007-09-04 11:54:51 · 3 answers · asked by Nathan 2 in Astronomy & Space

it would also help if you used those same numbers to make problems to equal numberSSS between 1 -100

2007-09-04 11:53:53 · 1 answers · asked by k.b. 2 in Mathematics

It takes a radio wave 1.3 seconds to travel from the Earth to the moon. How far is the moon from Earth?(radio waves travel at the speed of light)

2007-09-04 11:53:52 · 1 answers · asked by Claire P 1 in Mathematics

A teacher gives 2 mice viatimin c everyday for one month and a sugar pill to another twenty mice every day for a month. ALl the mice are fed once a day. what is not a constant experiment

A. the vitamin c
B. the frequency of feeding
C. the number of mice
D. the number of days the mice will recieve vitamin c

2007-09-04 11:53:06 · 1 answers · asked by me 2 in Chemistry

its a polar form and complex numbers prolbem
it says Find but they dont specify what so Im confused
1) |-0.2i|
2) |cos(theta) + isin(theta)|

2007-09-04 11:52:10 · 1 answers · asked by Teenage Dirtbag 1 in Mathematics