Science & Mathematics - 16 September 2007

A golf ball is struck with a five iron on level ground. It lands 105.0 m away 5.00 s later. What was the magnitude and direction of the initial velocity? (Neglect air resistance.)

____________ (m/s)
____________ * (Above the Horizontal)

2007-09-16 14:04:00 · 3 answers · asked by alimerzairan 1 in Physics

How can you bring up from the river exactly 6 quarts of water when you have only two containers, a 9 quart pail and a 4 quart pail, to measure with?

Also, to be done in exactly 8 steps.

2007-09-16 13:58:54 · 2 answers · asked by evepoyepo 2 in Mathematics

2007-09-16 13:57:55 · 2 answers · asked by Jon P 1 in Chemistry

A company is decreasing by 10 percent the amount of tuna sold in cylindrical cans. The cans will have the same height but a smalller diameter to minimize the impact on consumers when they see the smaller cans. By how much should the diameter be decreased to accomodate the change?

Could someone please explain how to do this problem. Thank you so much.

2007-09-16 13:55:56 · 7 answers · asked by Anonymous in Mathematics

A machine gun on the A-10 ground0 attack fighter aircraft fires 1300 rounds per minute, each of mass 1.4 kg, and attaining a speed of 800 m/s . Calculate the recoil experience by the aircraft.

2007-09-16 13:53:57 · 1 answers · asked by la_belle_creole_2000 1 in Physics

An owl is at the top, a starling is next, then grasshoppers, then grass. Which organism has the MOST energy available to it? I thought grass at first, but then I thought that the grass might just have the most energy in it, and that the grasshoppers have the most AVAILABLE. I'm not sure, so someone who is positive please help.

2007-09-16 13:48:46 · 8 answers · asked by lambofgod925 2 in Biology

These are for my chem. homework and I was wondering if I could get a few hints/formulas as how to solve these. I think I have the first one, but the second one is leaving me clueless...
help would be GREATLY appreciated!

1. What is the wavelength of light (in meters) whose frequency in the FM radiowave region is 103.9 MHz?

...and the really tough one...

2. The absorption of a photon of wavelength 6.71x10^2 nm causes an electron in a certain molecule to go from one energy level to a state of higher energy. Absorption of energy in this range causes an electron in the valence shell of a molecule to move to a higher level. If the higher electronic level has an energy of 4.840x10^-19 J, what is the energy of the lower electronic state?

2007-09-16 13:48:31 · 5 answers · asked by Britney 2 in Chemistry

doing math if u can answer this question it was put out it would be amazingly great.

2007-09-16 13:48:19 · 12 answers · asked by Anonymous in Engineering

My friend gave me some brain teasers, you have to find the pattern in both of these problems.

1) 0, 4, 8, 21, 52, 65
2) 15, 26, 40, 16, 37, 58

I worked all day on these problems and feel rather confused :(
I would appreciate any help.

2007-09-16 13:47:31 · 3 answers · asked by Anonymous in Mathematics

is nitrogen a more reactive element than oxygen?

2007-09-16 13:47:28 · 1 answers · asked by Anonymous in Chemistry

for uniform motion, the line in a d-t graph is horizontal and in a v-t graph, the line is horizontal. I did an experiment where i have to push a cart and calculate the position and velocity of it for 1.0 second. However ,when I graphed the data, the line was not straight. What are some unavoidable sources of experimental error that might have cause my graph to differ from what was expected?

2007-09-16 13:45:54 · 1 answers · asked by Anonymous in Physics

This was a highly respected science writer as well as science fiction author ("I, Robot")

2007-09-16 13:43:47 · 3 answers · asked by Anonymous in Astronomy & Space

The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net (see the drawing). Suppose that you loft the ball with an initial speed of v = 18.5 m/s, at an angle of = 46.0° above the horizontal. At this instant your opponent is 10.0 m away from the ball. He begins moving away from you 0.30 s later, hoping to reach the ball and hit it back at the moment that it is 2.10 m above its launch point. With what minimum average speed must he move? (Ignore the fact that he can stretch, so that his racket can reach the ball before he does.)

2007-09-16 13:42:12 · 3 answers · asked by yefimthegreat 1 in Physics

Imagine a huge orange that is actually a hypersphere in a 300 dimensional space with a radius of 100 m. What is the volume of the fruit after peeling it? The thickness of the peels is 2 m.

2007-09-16 13:41:26 · 3 answers · asked by Nes N 1 in Mathematics

If the ttemperature is 15 degrees and doubles it is 30 degrees. If the temperature is 10 degrees and doubles it is 20 degrees. BUT if the temperature is 0 degrees and it doubles then what is the temperature ???

2007-09-16 13:39:40 · 6 answers · asked by Fred S 1 in Weather

I recently started taking the dannon yogurts w/ probiotics each day. The instructions say to take them for two weeks to regulate your digestion. I thought It would be a good thing to try for my IBS. I have been taking them for a month and sometimes have two a day. Am I putting my health at risk?

2007-09-16 13:39:12 · 2 answers · asked by angela 1 in Medicine

I don't understand how many significant digits you should have when you're measuring things. Say you're measuring on the cm side of a ruler and it shows 3.5 cm. Would you put 3.5 cm or 3.50 cm or 3.500 cm. I don't understand how many significant digits there should be. Can someone please explain it to me so I'll know how to measure anything?

2007-09-16 13:38:51 · 2 answers · asked by ... 2 in Chemistry

with a rubber band, some type of box for a base, a container cap to hold a marshmallow, popsicle stick etc. (anything at home) i want it to look like this animation: http://www.howtobuildcatapults.com/catapultmangonelanimation.html

2007-09-16 13:37:53 · 1 answers · asked by superfly41691 4 in Engineering

2007-09-16 13:36:43 · 3 answers · asked by J L 1 in Mathematics

2007-09-16 13:33:31 · 5 answers · asked by ask me 1 in Astronomy & Space

2007-09-16 13:33:16 · 2 answers · asked by Sibel 1 in Mathematics

what is the most uniqu super power you can think of. be creative.
results should inculdse the dsuper power and how such uniqu super power can be used.
to the winner ill award the fullest points possible

2007-09-16 13:33:15 · 3 answers · asked by minds_3eye_i_posses 1 in Engineering

2007-09-16 13:24:38 · 2 answers · asked by back2back 2 in Physics

what is specific gravity? and in what units is it expressed?

2007-09-16 13:24:05 · 3 answers · asked by Cole 2 in Chemistry

can ya'll help me with these here problems? it also says to leave the appropriatte number of significant figures in the answer. thanks.


a. 98512- 48.3
b. 3351.2- 40
c. 1000 x 48.3
d. 385/ 0.85
e. 1.008 / 0.500

2007-09-16 13:19:04 · 1 answers · asked by Anonymous in Physics

the plan start 20 degree N of East with speed 760 km/hr. the wind blow from West with speed 60 km/hr

a) which direction the plane end up flying
b) what is relative speed to ground

2007-09-16 13:16:32 · 1 answers · asked by jennifer 2 in Physics

Enviornmental science paper, and I'm stumped

2007-09-16 13:14:24 · 3 answers · asked by Christy 2 in Earth Sciences & Geology

2007-09-16 13:12:23 · 6 answers · asked by breanne w 1 in Astronomy & Space

You are the district attorney. You face 10 court cases a year and have a $100,000 budget. In any given court case, the probability of winning is equal to X/2000, where X is the amount of the budget spent on the case. If a defendant is found guilty they must pay a fine of $2000.
a. What is the expected amount of fines the DA will collect if plea bargains are not allowed and the DA’s budget is distributed evenly among cases?

Thanks. I don't know whether I did something wrong here, but I divided 100,000/10 and I got 10,000. I then did the equation 10,000/2,000 and I got 5 for the probability, which I know is wrong because Probability isn't suppose to be greater than 1. Did I do it right? How would you approach this problem?

2007-09-16 13:05:57 · 2 answers · asked by Anonymous in Mathematics

2007-09-16 13:05:19 · 14 answers · asked by Anonymous in Astronomy & Space