Science & Mathematics - 26 October 2006

please help me, i dont undersatnd it!

2006-10-26 23:56:36 · 1 answers · asked by annevragejoe318 2 in Mathematics

A small box is held in place against a rough wall by someone pushing on it with a force directed upward at 28 degres above the horizontal. the coefficients of static and kinetic friction are .40 and .30 respectively. the box slides down unless the applied force has magnitude 13n. What is the mass of the box?

2006-10-26 23:53:05 · 2 answers · asked by Anonymous in Physics

fly and train heading towards each other at the same speed.
think about the movement of both the fly and the train

2006-10-26 23:47:27 · 25 answers · asked by Anonymous in Physics

2006-10-26 23:46:57 · 16 answers · asked by ma_daaboul 1 in Weather

i mean natural drilled from an oil filled how is separated from petroleum

2006-10-26 23:44:40 · 4 answers · asked by yettimat 1 in Engineering

2006-10-26 23:44:09 · 3 answers · asked by Anonymous in Other - Science

2006-10-26 23:41:09 · 9 answers · asked by td321123 1 in Physics

2006-10-26 23:39:23 · 8 answers · asked by jill_andrews32 1 in Mathematics

2006-10-26 23:36:40 · 5 answers · asked by dillip 1 in Earth Sciences & Geology

2006-10-26 23:35:12 · 3 answers · asked by horse 2 in Earth Sciences & Geology

How do you figure what percent increase $2,345 is over $2,000?

How do you figure what percent $400 is of $3,789?

2006-10-26 23:29:45 · 7 answers · asked by Anonymous in Mathematics

Q1:A wholesaler has 315 containters of water, he distributes the containters equally amongst 7 shops. If each container holds 4 litres of water, how many litres dose each shop get?

Q2 A tanker can hold 3500L petrol. The petrol is then pumped into containers each holding 5L. How many containers would be needed if 70L of petrol has leaked out of the tanker?

Q3. A fish tank is a quater full of water. If 3300 ml is needed to fill the tank, find the capacity of the tank.

I know im stupid for not knowing this just that i suck at maths.

2006-10-26 23:25:46 · 8 answers · asked by daniel k 2 in Mathematics

we need all the information possible on zoologists for a grade 3 assignment please.

-type of work involved
-do they work with other scientists?
-what do they do to become a zoologist?

etc etc

2006-10-26 23:19:24 · 3 answers · asked by Jemma 1 in Zoology

2006-10-26 23:18:03 · 7 answers · asked by menokki 2 in Chemistry

Police investigators, examining the scene of an accident involving two cars, measure 72m long skid marks of one of the cars, which nearly came to a stop before colliding. The coefficent of kinetic friction between rubber and the pavement is about .80. estimate the initial speed of that car assuming a level road?

2006-10-26 23:12:38 · 4 answers · asked by Anonymous in Physics

A cyclist is coasting at a steady speed of 12m/s but enters a muddy stretch where the effective coefficient of friction is .60. Will the cyclist emerge from the muddy stretch without having to pedal if the mud last for 11m? If so, what will be the speed upon emerging?

2006-10-26 23:09:35 · 4 answers · asked by Anonymous in Physics

2006-10-26 23:05:23 · 10 answers · asked by hamster h 1 in Astronomy & Space

a^(n)-b^(n) = (a-b)^(n)+nk(a-b)
here if either "a" or "b" is odd and "n" is any prime & 4 then "k" will be a rational number.
prove that it is impossible to write
(a-b)^(n)+nk(a-b) =1
for n>2.
if n=2 then a & b will have infinite solutions for certain k`s
for e.g
if n=2 take k=0.75 then a=1.25 & b=0.75.

2006-10-26 23:02:55 · 2 answers · asked by rajesh bhowmick 2 in Mathematics

A.kinetic energy only
B.potential energy only
C.both kinetic energy and potential energy
D.kinetic plus potential energy
E. None of these forms remains constant.

2006-10-26 23:00:20 · 9 answers · asked by ally 2 in Physics

If there is only difference, there will be no confusion.
Confusion is because of equivalence.
We try to resolve the differences.
If we resolve the diference, confuison begins.

Resolving the differences is the origin of confusion!!!
We fight because of equivalence not because of difference!

2006-10-26 22:57:41 · 6 answers · asked by The Knowledge Server 1 in Mathematics

2006-10-26 22:56:59 · 10 answers · asked by hamster h 1 in Physics

2006-10-26 22:48:24 · 6 answers · asked by hamster h 1 in Earth Sciences & Geology

It is about communication engineering.

2006-10-26 22:45:32 · 4 answers · asked by knjoshipura 1 in Engineering

2006-10-26 22:42:04 · 12 answers · asked by snehi c 1 in Astronomy & Space

the Cactus with broad leaves -like palm shape is full of Irons.It looks like strawberry visually and covered with lot of thorns .

2006-10-26 22:35:15 · 10 answers · asked by Anonymous in Botany

I watch lots of science fiction films but will this really happen

2006-10-26 22:34:44 · 9 answers · asked by td321123 1 in Physics

2006-10-26 22:33:40 · 3 answers · asked by g 2 in Mathematics

i heard the the ion engine is slow but last long before running out of fuel and the rocket engine blast off at top speeds but last only in a few seconds or minutes depending on the fuel tank

2006-10-26 22:31:16 · 3 answers · asked by td321123 1 in Astronomy & Space

2006-10-26 22:27:47 · 3 answers · asked by g 2 in Mathematics

2006-10-26 22:24:35 · 4 answers · asked by Anonymous in Engineering