Science & Mathematics - 7 November 2007

How to do the problems and the answers:
1.8y-(5y+2)=16
2.8x-4(x-2)=24
3.4(2n+1)-3(2n-5)=29
if you can do all of them that would be great or at least some of them thanks!

2007-11-07 10:34:34 · 12 answers · asked by heely03 2 in Mathematics

It is hard and boggling my mind, can anyone do it., but I want an explanation to ge the answer----but an answer as well.

It is the following:

What is the samllest possible angle between hands of a clock at x minutes after y o'clock?


THANKS!

2007-11-07 10:31:31 · 5 answers · asked by lugjol 1 in Mathematics

There is a ramp with height "h". There is a box at the top of the ramp and it starts at rest, v0=0. There is no friction on the ramp. The catch is that this ramp is in a moving truck, moving at velocity "u". Once the box is released, it moves at it's own velocity "v" plus the velocity of the truck "u", if I am correct. So the total kinetic energy of the box should be: K=(1/2)mu^2+(1/2)mv^2 or (1/2)m(u^2+v^2). However, I looked at the back of the book and the answer says (1/2)m(u+v)^2, which is not equal to the other equation. What did I do wrong? If you need further explanation please ask me. I am in dire need of help!

2007-11-07 10:30:47 · 1 answers · asked by texasrag31 1 in Physics

Problem;
2X+7>3

i got as my solution set (-1, infinity) is that right??

2007-11-07 10:26:16 · 2 answers · asked by Anonymous in Mathematics

A 3.30-kg block of wood rests on the muzzle opening of a vertically oriented rifle, the stock of the rifle being firmly planted on the ground. When the rifle is fired, an 7.88-g bullet (velocity = 8.30 102 m/s, straight upward) becomes completely embedded in the block.
the velocity of the block/bullet system immediately after the collision.is 1.977

Ignoring air resistance, determine how high the block/bullet system rises above the muzzle opening of the rifle.
? m

2007-11-07 10:25:34 · 1 answers · asked by Anonymous in Physics

kw=gph x delta T / 410


How do you work this out???

2007-11-07 10:20:09 · 1 answers · asked by MillK J 2 in Engineering

if a object weight 400N and travels to another planet with twice mass twice radius, then the weight of that object on this planet is?

2007-11-07 10:15:31 · 2 answers · asked by ken 2 in Astronomy & Space

2007-11-07 10:13:15 · 3 answers · asked by Anonymous in Biology

2007-11-07 10:12:34 · 2 answers · asked by Anonymous in Biology

2007-11-07 10:12:23 · 3 answers · asked by Anonymous in Biology

2007-11-07 10:11:14 · 2 answers · asked by Anonymous in Biology

2007-11-07 10:09:34 · 3 answers · asked by Anonymous in Biology

can you please give me one reason why large organisms have developed from more cells rather than larger cells?

2007-11-07 10:08:37 · 1 answers · asked by Sam L 1 in Biology

Does anyone remember the debate between the Dow Chemist and TWO ( 2 ) evolutionists on PBS, channel 19? He proved it is a RELIGION that requires more faith than any other religion!!! Yet we allow it! It is not chemically or mathematically possible to the biggest degree! That means it did not happen. Does anyone not wonder why those who challenge it fully from a scientific point of view are called religious? The Dow Chemist, who never mentioned a Creation, was accused! What will we have next in our schools that we push, and yet is a pipe dream? We need to get rid of that religion in the schools! What do you think? Earl

2007-11-07 10:08:01 · 7 answers · asked by ? 6 in Other - Science

Is detergent similar to oil.. if it's not like oil
when ur hands r rusty.. -n- u go wash the dishes... when ur done why r they not rusty.

2007-11-07 10:05:27 · 8 answers · asked by Mee-Mee G 1 in Chemistry

name one thing that animal cells have that plant cells dont or the size of their cells and it cant be lysosome or cell shape

2007-11-07 10:03:44 · 9 answers · asked by Anonymous in Biology

A particle, P, moves along the x-axis. P is initially at rest at the origin, O. At time, T, seconds the acceleration of P in the direction of x is increasing is (3t^2-14t+12)ms^-2. Find:
a) the none-zero values of t at which P is instantaneously at rest.
b) the distance travelled by P in the interval 1
I tried equating the equation to zero and it almost factors to -3 and -4.

2007-11-07 09:57:30 · 1 answers · asked by Anonymous in Mathematics

What is (-8xz/y^4)^2
the ^ indicates the power of
thanks

2007-11-07 09:56:48 · 4 answers · asked by kevinitisii 3 in Mathematics

I got 4(s^2-64) are you supposed to further reduce that?

2007-11-07 09:54:20 · 2 answers · asked by Epitaph 2 in Mathematics

how in the world do you work vertical and horizontal asymptotes? if i had the problem y=5x^3 +2x/2x^5 -4x^3

^ that symbol represents something to a power like 5x^3 (five x to the third power)
and / (is the fraction sign, so five x to the third plus two x over two x to the fifth power minus four x to the third power.)

if anyone could show me how to work these or point me to a algebra 2 tutoring site that would be lovely

2007-11-07 09:50:03 · 2 answers · asked by Anonymous in Mathematics

do sunflowers produce fruit? if so what is it?

for some reason i want to think its sunflower seeds but im not really sure.

2007-11-07 09:49:38 · 2 answers · asked by Erin 3 in Botany

2007-11-07 09:46:19 · 6 answers · asked by Mysterious Ace 2 in Engineering

i can't figure it out, can any of u help me?

2007-11-07 09:45:41 · 2 answers · asked by yerok 2 in Mathematics

The average case of batteries has a maximum of 5% defect. From 100 cases, what is the probability that this number will not be met? Thanks in advance

2007-11-07 09:43:20 · 1 answers · asked by star_wisher86 1 in Mathematics

At what distance from the equator should the company lay the cable to compensate for their mistake in ordering shorter cable?

2007-11-07 09:42:57 · 1 answers · asked by Alexander 6 in Mathematics

You can interpret this question anyway it can logially be interpreted.

2007-11-07 09:42:00 · 29 answers · asked by Sprinkle 5 in Biology

Here is the problem-
A giraffe can run 32 mph. What is its speed in feet per second? Round to the nearest tenth.

2007-11-07 09:40:42 · 3 answers · asked by Tom 2 in Mathematics

A 7.27 g bullet is fired vertically into a 1.16 kg
block of wood.
The bullet gets stuck in the block, and the
impact lifts the block 0.39 m up. (That is, the
block - with the bullet stuck in it - rises
0.39 m up above its initial position, and then
falls back down.)
Given g = 9.8 m/s^2. What was the initial
velocity of the bullet? Answer in units of
m/s.

2007-11-07 09:39:12 · 2 answers · asked by lilprincess_2good4u 1 in Physics

Assume a major league baseball pitcher can pitch at 85 miles per hour. If he could pitch that fast straight upward, from what height must a ball be dropped so that the ball pitched and the ball dropped hit the ground at the same time? (Hint: there are 5280 feet in 1 mile)

2007-11-07 09:36:28 · 3 answers · asked by NYcubsfan 1 in Physics

2007-11-07 09:35:39 · 13 answers · asked by Anonymous in Biology