Science & Mathematics - 18 December 2007

A game is played similar to tennis as follows:

To win the game, a player must score at least 4 points with a margin of 2 or more points over his opponent. e.g. he can win 4-0, 4-1, 4-2, but not 4-3. If it's tied at 3-3, 4-4 or higher, then they keep playing indefinitely until one person gains a 2 point lead.

If the probability of me winning a point is p, calculate the probability that I will win the game.

2007-12-18 08:30:05 · 4 answers · asked by Dr D 7 in Mathematics

2007-12-18 08:27:09 · 3 answers · asked by Jansen J 4 in Astronomy & Space

I know the theories authors of ghost hunting methods teach, but am wondering what your opinion is.

2007-12-18 08:24:25 · 12 answers · asked by Anonymous in Paranormal Phenomena

We have some evidence to back the theory but why do we still have quams about it happening? whats your idea?

Katie
xoxox

2007-12-18 08:23:22 · 18 answers · asked by Katie 1 in Astronomy & Space

A 27.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley (Fig. 4-57). The coefficient of static friction between the table and the block is 0.415 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move.

Here's the picture: http://i12.tinypic.com/6t3hki0.gif

Thanks soo much for your help!!

Please check out my other questions...even if you are not sure how to do this one. Thanks!!!!!!

2007-12-18 08:23:16 · 1 answers · asked by Bollywood Masti 4 in Physics

The Moon has more surface craters than Earth does because the Moon has

1. no significant atmosphere
2. a surface more sensitive to impacts
3. a smaller diameter than Earth
4. a stronger gravitational force

any ideas what the answer is?

2007-12-18 08:22:38 · 6 answers · asked by GirlyGirl 2 in Astronomy & Space

Specifically, how can I show a sequence of polynomials doesn't converge uniformly on (0,1) to the function f(x) = sin(1/x)

2007-12-18 08:20:44 · 4 answers · asked by Anonymous in Mathematics

2007-12-18 08:19:52 · 3 answers · asked by housecat57 1 in Biology

In the United States, a trillion is written as
1,000,000,000,000 - (twelve zeros)

whereas in most other countries, this number refers to a billion.
In those countries, 1,000,000,000,000,000,000 which is to us, a quintillion.

Can anyone explain why this is so?

2007-12-18 08:19:48 · 3 answers · asked by ♪ 4 in Mathematics

2007-12-18 08:17:34 · 9 answers · asked by CLAIRE H 1 in Geography

Two identical masses are attached by a light string that passes over a small pulley. The table and the pulley are frictionless. Calculate the masses' acceleration and the tension on the string.

Please show/explain all work and show what formulas were used.

2007-12-18 08:16:41 · 1 answers · asked by Anonymous in Physics

2007-12-18 08:15:46 · 3 answers · asked by wasnt_invited 1 in Physics

2007-12-18 08:15:15 · 3 answers · asked by Anonymous in Chemistry

So the question goes like this:
A TV camera at ground level is filming the liftoff of a space shuttle that is rising vertically according to the position eqn: s(t)=50t^2, where s is measured in feet and t is measured in seconds. The camera is 2000 feet from the launch pad.

Find the velocity of the space shuttle when it is 5000ft high.
[[I did this already, and I got 1000 ft/s. I know that it is right.]]

Find the rate of change in the angle of elevation of the camera when the space shuttle is 5000 ft. high.
[[I can't figure this one out for the life of me. I think it has something to do with inverse tangent, and with the previous anwser (1000 ft/sec).]]

So for the second part... is my answer of 2/29 right?

2007-12-18 08:14:42 · 3 answers · asked by hp_ddocd 1 in Mathematics

How can you explain Jupiter having two moons moving in different directions?

2007-12-18 08:13:10 · 8 answers · asked by Cody™ 3 in Astronomy & Space

Say I was to record myself blowing up a balloon. Let’s say it took 20 seconds. I then reverse the recording a play you the first 15 seconds.

You may extrapolate and conclude that the balloon got smaller and smaller until it no longer existed. But we know that if this was the case then the balloon could not have inflated in the first case as the valve would not have been present. I guess those missing first 5 seconds are crucial!

Now let’s transfer this analogy to cosmology. Is it logical to extrapolate the universe back to a singularity? Especially based on the equipment, techniques, methods, resources and evidence we have available.

In doing so, are we removing the analogous valve and balloon factory from the equation?

2007-12-18 08:12:24 · 4 answers · asked by Future Human 1 in Astronomy & Space

i read that we dont have technology enought to make pyramedes out or rock like the egyptians did? is this true?
and why caint we?

2007-12-18 08:09:49 · 7 answers · asked by Anonymous in Engineering

what did it look like

2007-12-18 08:05:07 · 19 answers · asked by Anonymous in Astronomy & Space

Help?

2007-12-18 08:03:52 · 4 answers · asked by Vash ;D 1 in Mathematics

I need the character that indicates the character can be both plus or minus.

2007-12-18 08:01:42 · 16 answers · asked by Ray Ray 2 in Mathematics

guys ther is an answer for this???
lets see how u people answer........

2007-12-18 08:00:40 · 16 answers · asked by Jay 2 in Botany

At 7:00 a.m. Joe starts jogging at 6 mi/h. At 7:10 a.m. Ken starts off after him. How fast must Ken run to overtake Joe at 7:30 a.m.?

3 mi/h
or
5 mi/h
or
7 mi/h
or
9 mi/h

thanks

2007-12-18 07:56:37 · 1 answers · asked by Anonymous in Mathematics

Which variables can equal zero if it is true that:
(w/x) divided by (y/z) = (WZ)/(XY)

2007-12-18 07:56:29 · 2 answers · asked by Anonymous in Mathematics

A force of 26.0 N is required to start a 3.2 kg box moving across a horizontal concrete floor. If the 26.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic friction?

I got answers like 2.8, .051, 1.6, and .625

None of these were correct. Please help and explain your answers.

Also, I have posted other such questions. Even if you don't know how to do this one, please check those out in case you know how to do those. Thanks!

2007-12-18 07:54:30 · 2 answers · asked by Bollywood Masti 4 in Physics

2007-12-18 07:53:11 · 9 answers · asked by B g 1 in Astronomy & Space

not completely quantum, more as a rather of chance and philosophy:

Is it possible for an alien race to be millions of years ahead of humanity to be able to produce a nova explosion?

just reading a news story about a bright explosion a few billion light years away where there was relatively nothing- science fiction yes, but food for thought

2007-12-18 07:52:52 · 2 answers · asked by Flaming Pope 4 in Astronomy & Space

I am in the process of asking for my one wish to be granted by a foundation. I know what telescope, software, and even accessories and laptop I want. But the hard part is the camera. I just dont know what features make for a very good astrophotography camera. If someone could please help I would greatly appreciate it.

2007-12-18 07:51:10 · 2 answers · asked by balefor 1 in Astronomy & Space

we had a lab were we built a parachute and was given a lab sheet i have to draw the parachute and label all the forces that act on it... im guessing i need to label weight and the normal force but what other forces do i need to label??? friction?air resistance?

also on a kite, how is a kite similar and different to a parachute??? all i have so far is one stays in the air and one drops but i dont think that is acceptable to put down.

2007-12-18 07:49:46 · 2 answers · asked by molly 1 in Physics

I'm having serious troubles with these and have been working on them for some time. I'm mathtarded and have a major headache over these.

tanx ( sinx + cotx cosx) = secx
sin x (csc x - sin x ) = cos^2x
cos^2x + tan^2x + cos^2 x = 1
sec^2x + tan^2x sec^2x = sec^4 x


can anyone help me through these? :(

2007-12-18 07:49:16 · 5 answers · asked by ? 1 in Mathematics

Up near Truckie, the Schmidt boys are inner tubing down a snow covered creek bed. Fred and his tube weigh 225 pounds together. The creek bed is a 20 degree incline. How fast will Fred be going at the end of a 30 meter run?

Please show/explain all work. Please show all formulas used.

2007-12-18 07:49:13 · 1 answers · asked by Anonymous in Physics