Science & Mathematics - 5 September 2007

2007-09-05 04:00:45 · 6 answers · asked by jamet002 2 in Chemistry

I'm having some problems with this problem. Could someone please assist me? Thank you so much!

A dart gun is fired while being held horizontally at a height of .816 m above ground level, and at rest relative to the ground. The dart from the gun travels a horizontal distance of 7.65 m. A child holds the same gun in a horizontal position while sliding down a 45.8 degree incline at a constant speed of 1.94 m/s. The acceleration of gravity is 9.8 m/s^2.

What horizontal distance x will the dart travel if the child fires the gun forward when it is .539 m above the ground? Answer in units of m.

2007-09-05 04:00:12 · 2 answers · asked by sg88 1 in Physics

2007-09-05 03:59:51 · 3 answers · asked by Napoleon B 2 in Astronomy & Space

I believe the more our space travels the more our planet earth will cold. why????
consider the the equation F = Gm1m2 / r2 which is newtons law of gravity.
let us assume m1 = mass of the earth.
my theory suggests that as we take matter in the form spaceship parts , satelites and even human beings off the earth and leave them in space, this mass ,m1 in the Newtons equation will reduce causing the centripetal force between the earth and the sun also to do the same.this wil mean that our planet is falling into the far and cold just like pluto .

what do you think? can I be right? let me know.

2007-09-05 03:59:30 · 24 answers · asked by firebird 1 in Astronomy & Space

of the drug

2007-09-05 03:58:52 · 10 answers · asked by whisper2ya 2 in Medicine

Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, the hip's speed at impact is about 2.0 m/s. I this can be reduced to 1.3 m/s or less, the hip will not fracture. One way to do the is by wearing elastic hip pads. (a) if a typical pad is 5.0 cm thick and compresses by 2.0 cm during the impact of a fall, what acceleration in m/s^2 and g's) does the hip undergo to reduce its speed to 1.3 m/s? (B) The acceleration you found in part (a) may seem like a rather large acceleration, but to fully assess its effects on the hip, calculate how long it lasts.

2007-09-05 03:57:19 · 1 answers · asked by Anonymous in Physics

2007-09-05 03:57:12 · 1 answers · asked by whisper2ya 2 in Chemistry

1.Find the value of m if

mx^2 - [2 (squareroot2)]x + m - 10


2. log base 3 (x +5) = 1 + log base 9 (2x + 1)


THANKS!!

2007-09-05 03:55:30 · 1 answers · asked by Anonymous in Mathematics

I'm really confused about this problem. I have broken it down into components (x, x initial, etc.), but I seem to not have enough info. If someone could please assist me, I would greatly appreciate it. Thanks!

A coyote is chasing a roadrunner. While running down the road, they come to a deep gorge, 15 m straight across and 110 m deep. The roadrunner launches itself across the gorge at a launch angle of 11 degrees above the horizontal, and lands with 2.5 m to spare. The acceleration of gravity is 9.81 m/s^2.

What was the roadrunner's launch speed? Ignore air resistance. Answer in units of m/s.

2007-09-05 03:54:37 · 3 answers · asked by sg88 1 in Physics

There is a raccoon outside in the daytime currently and I am not sure to call animal control or not because I am afraid they will kill it even if there is nothing wrong with it. Please Help!!!

2007-09-05 03:51:45 · 7 answers · asked by Anonymous in Zoology

fast

2007-09-05 03:48:52 · 4 answers · asked by That/Cool/Person 2 in Chemistry

Two straight railways converge to a level crossing at an angle α and two trains are moving towards the crossing with velocities u and v. If a and b are the intial distances of the trains from the crossing, show that their least distance apart will be:-
{(av-bu)sin α}/{(u^2+v^2-2uvcos α)^1/2}

2007-09-05 03:47:00 · 1 answers · asked by rock_bottom456 2 in Physics

2007-09-05 03:44:05 · 5 answers · asked by Ruby M 1 in Chemistry

2007-09-05 03:43:12 · 4 answers · asked by Irosh Bandara 5 in Zoology

What is the slope of the line that passes through the points (3, 6) and (3, 10)? I am having trouble on this one I either come up with 0 or 4 can some one please help? I know what I am doing but I dont know what I am messing up on...I take (y2-y1)/(x2-x1) which is (10-6)/(3-3)...

2007-09-05 03:43:05 · 9 answers · asked by MEB 2 in Mathematics

2007-09-05 03:42:37 · 6 answers · asked by Anonymous in Astronomy & Space

Explain how scientists go about answering a question. Use the words hypothesis, inquiry, evidence, experiment, and test in your answer.

2007-09-05 03:40:40 · 1 answers · asked by Anonymous in Astronomy & Space

Role of gravity

2007-09-05 03:37:31 · 10 answers · asked by Anonymous in Astronomy & Space

I know carbocation stability proceeds tert>sec>prim, but does that mean carbanions are opposite?

one more detail. My problem is showing a butane with a lone pair on the second carbon. I have to compare relative stabilities with a CH2 substituent on a cyclohexane. I need to know WHY one or the other is less stable.

2007-09-05 03:36:40 · 3 answers · asked by The GMC 6 in Chemistry

I know consumption increases with rpm, but in what proportions does it increase? Is it linear, e.g 2000 rpm is double the consumption of 1000. Or is it in the degree of 2 or something, like 4000rpm uses 4 times the petrol of 2000 beacuse it doubled. I know its a bit of a random question but there you go...

2007-09-05 03:35:19 · 6 answers · asked by quo287 1 in Engineering

I have to integrate x/(2-x) dx.
I've tried everything I can think of and I can't figure it out. I think I might be missing something really simple. Or maybe not =\.
Anyway, help is appreciated.
Thanks!

2007-09-05 03:34:18 · 3 answers · asked by infinitelygreen 1 in Mathematics

2007-09-05 03:33:08 · 16 answers · asked by lowebes 1 in Astronomy & Space

2007-09-05 03:32:42 · 8 answers · asked by famosrussellbartle 1 in Astronomy & Space

Prove the statement about the divisibility of integers

If d I (a+b), and d I a, then d I b

2007-09-05 03:31:24 · 4 answers · asked by Dan 1 in Mathematics

Prove the statement where M and N are integers.

if x=5m+6 and y=5n+6, then xy=5k+6 for some integer k.

2007-09-05 03:29:24 · 3 answers · asked by Dan 1 in Mathematics

>continue>
600 volts line. find the change and the voltage of each capacitor

2007-09-05 03:28:34 · 1 answers · asked by carl y 1 in Physics

2007-09-05 03:25:10 · 1 answers · asked by Deborah M 1 in Physics

1. State the relationship between wavelength and energy of light.

2. Every element has its characteristics emission spectra. What elements give of yellow light, red light and violet light?

3. Using the spectrum of the hydrogen atom, how are the following colors produced?

A. Red
B. Green
C. Blue
D. Violet


-----> Which color has the highest energy and the lowest energy?

2007-09-05 03:22:03 · 3 answers · asked by Anonymous in Chemistry

1/3x + 3

2007-09-05 03:21:38 · 5 answers · asked by Michael S 1 in Mathematics

what all machinery do we need for wood lamination? i wanna start a small scale industry which produces wood laminates and sells the laminates to the distributors.so, what all machinery do i require and how much will they cost??

2007-09-05 03:21:32 · 1 answers · asked by Anonymous in Engineering