Science & Mathematics - 20 October 2007

While studing for a mechanics test, I created a problem that no one I knew including my professor could solve. I eventually solved it, and would like to see who else can.

You have a massless inclined plane whose angle is Theta. There is no friction or gravity anywhere in the problem. There is a block of mass M on the incline. You apply a force to the vertical part of the incline of F. The incline is attached to a rail so that it can only move left and right, so no up or down movement, and no rotation.

Remember no friction of gravity, massless inclined, M mass block, force F applied parallel to the base of the block to push it along the frictional rail.

What is the acceleration of the inclined Plane at any angle where theta is between 0 and 90 not inclusive. (at 90 they act as one piece, so its easy, and at 0 a force cant be applied at all!)

Good Luck!

2007-10-20 13:04:18 · 3 answers · asked by carrotstien 2 in Physics

What if what you think is your "past lives" is really spirits who lived those lives & are trying to communicate through you ...through their past experiences and feelings and fears etc. Do you think this is possible?

2007-10-20 13:01:53 · 12 answers · asked by Deenie 6 in Paranormal Phenomena

The resistance of a resistor is 9.1 Ohms and the resistance of a coil is 4.6 Ohms
(Both of these values were measured with an ohmmeter.)
What is the resistance of the circuit when driven at its resonant frequency?
__________________Ohms.
(Write N/A if there is not enough information to answer.)
Use Three Sig figs.

PLEASE HELP ME AND EXPLAIN, I'M CONFUSED ABOUT THIS, THANKS

2007-10-20 13:01:02 · 5 answers · asked by Anonymous in Physics

A 4.182 g sample of a mixture Zn and Al is treated with excess HCl. If 0.1686 moles of H2 are obtained, then what os the % by mass of Zn in the original mixture?

2007-10-20 12:59:01 · 1 answers · asked by Help! 1 in Chemistry

any coment

2007-10-20 12:57:21 · 3 answers · asked by Anonymous in Astronomy & Space

can anyone show me the steps how to integrate ∫csc^3 (x) please

2007-10-20 12:55:55 · 2 answers · asked by Anonymous in Mathematics

the interval is 0 is less than of equal to x and x is less than or equal to 2. the equation is s=t^2-3t+2.

2007-10-20 12:55:54 · 1 answers · asked by xboxturbo 3 in Mathematics

wouldn't Natural selection eliminate sexual dysfunction early on, since its such a critical step in genetic prorogation, even if it remain recessive? For many a men, it's not simply a mental inhibition, but a biological reinforcement.

2007-10-20 12:48:49 · 4 answers · asked by Anonymous in Biology

A solution is prepared by dissolving 10.6 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.00 mL sample of this stock solution is added to 58.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.

2007-10-20 12:36:10 · 1 answers · asked by Anonymous in Chemistry

I'm lonely!!!

2007-10-20 12:35:49 · 9 answers · asked by Deenie 6 in Paranormal Phenomena

2007-10-20 12:34:10 · 4 answers · asked by Anonymous in Biology

If you lower the current in a diode from say, 1A to .5A (not all the way off) the excess carriers eventually get reduced. What is this process called? recovery? width reduction? How long does this take...transit time? or is it some other phrase?

2007-10-20 12:33:49 · 2 answers · asked by Hgldr 5 in Engineering

I am doing a content analysis project for Psychology and have a question. Let's say that I have four raters who each want to record the number of instances of aggression in a TV show.

Rater 1: 10 instances
Rater 2: 5 instances
Rater 3: 7 instances
Rater 4: 9 instances

How can I calculate the correlation coefficient and the inter-rater reliability of the observers? I did a good amount of research on the subject, but am only a junior in high school, so statistical analysis is not my forte, per se. If anyone could explain how to do this, I'd be more than grateful.

Thanks!

2007-10-20 12:31:10 · 2 answers · asked by Anonymous in Mathematics

2007-10-20 12:29:29 · 2 answers · asked by Anonymous in Mathematics

I know the electromagnetic spectrum goes from long to short wavelengths, starting with radio and ending in gamma waves. What is beyond these two 'end' waves. Is there an upper or lower limit to the EM spectrum?

Do Radio and Gamma waves have the widest range of frequencies? And if so, do they have the widest range of attributes?

2007-10-20 12:21:19 · 4 answers · asked by jos c 1 in Physics

Also is there an easy method other than trial and error to figure out divisibility for other large numbers?

2007-10-20 12:13:17 · 5 answers · asked by Anonymous in Mathematics

It doesn't use gas, costs $10,000 for the car, $16,000 for the minivan, has a 70 pound aluminum compressed air engine, goes 68 mph, has a 129 mile range, and cost less than $2.00 to charge the carbon fiber air tanks up to 4300(?) psi. You can get a pv panel to charge it up in the parking lot if it is sunny.

2007-10-20 12:12:56 · 4 answers · asked by spoy 1 in Engineering

6y
_______
y2-2y-24

Simplify

2007-10-20 12:10:16 · 4 answers · asked by Anonymous in Mathematics

I'm not interested in a toy telescope, but I'd like to keep the price below $500. I'm so confused by the options! I want to actually be able to see stuff, but I'm not getting another degree in optics in order to work the telescope. Any suggestions?

2007-10-20 12:09:27 · 9 answers · asked by Anonymous in Astronomy & Space

i need to learn!!!

2007-10-20 12:00:38 · 1 answers · asked by hot emo kid 1 in Botany

A 5 Part Question:

a) Name the first Country that sees the dawn of the new day (that's not a polar country in summertime.)

b) What city has more people Karachi, Pakistan or Los Angeles, California.

c) What's larger in square miles China or the United States of America?

d) What country provides 80% of the world's supply of the mineral Coltran for cell phones and also has had the most deaths in the last ten years?

e) Name the 3 Seas directly North, East and South of the Mediterranean Sea.

2007-10-20 12:00:12 · 6 answers · asked by Richard V 6 in Geography

I need as much info as possible about the importing and exporting of goods in Haiti. Please tell me what you know and if you can website addresses.
Please and Thank you. xoxo

2007-10-20 11:54:08 · 2 answers · asked by xoxo 3 in Agriculture

I live in houston, texas

Where do i look to see the shower?

any good meteor watch tips?

2007-10-20 11:51:52 · 3 answers · asked by mendoncadam 2 in Astronomy & Space

science question.

2007-10-20 11:49:01 · 14 answers · asked by pear~bear 2 in Biology

2007-10-20 11:47:17 · 3 answers · asked by Anonymous in Astronomy & Space

2007-10-20 11:47:03 · 1 answers · asked by Anonymous in Chemistry

I would like the formula to determine this

2007-10-20 11:43:02 · 4 answers · asked by Brandi 1 in Mathematics

OK, i really need help describing this since i ran out of words to say:

Explain why corresponding angles, alternate interior angles, alternate exterior angles, and same-side interior angles (or consecutive angles) are appropriate terms, describing their locations of the pairs of angles.

I know what they are, I just don't know how to describe them. So, if you can help please answer this. Thank You!

2007-10-20 11:38:47 · 1 answers · asked by iluvAJ12 3 in Mathematics

The equation

x ^2 − 8x + y ^2 + 4y + 11 = 0

represents a circle.

a) Find its centre and radius.

(b) Find the coordinates of any points at which the circle in part (a) intersects the line y = −x − 1.

2007-10-20 11:38:27 · 8 answers · asked by Anonymous in Mathematics

2007-10-20 11:37:56 · 4 answers · asked by Anonymous in Astronomy & Space