Physics - May 2007

2007-05-27 19:39:19 · 12 answers · asked by chhavi s 1

General curiousity, in partiucular films where the bible saves the day it being close to the mans heart. I didnt know which category should the question be posted in

2007-05-27 19:36:21 · 11 answers · asked by Kabaria 2

See this: http://library.thinkquest.org/03oct/02144/glossary/pics/concave_mirror.png

2007-05-27 19:07:56 · 5 answers · asked by wei jun 1

A mortar fires a shell of mass m at speed v_0. The shell explodes at the top of its trajectory as designed. However, rather than creating a shower of colored flares, it breaks into just two pieces, a smaller piece of mass 1/5m and a larger piece of mass 4/5m. Both pieces land at exactly the same time. The smaller piece lands perilously close to the mortar (at a distance of zero from the mortar). The larger piece lands a distance d from the mortar. If there had been no explosion, the shell would have landed a distance r from the mortar. Assume that air resistance and the mass of the shell's explosive charge are negligible.

Find the distance d from the mortar at which the larger piece of the shell lands.

Express d in terms of r.

2007-05-27 18:52:04 · 1 answers · asked by Anonymous

A friend I fish with said he is going to put an air valve stem on each of his pontoon boat's floating aluminum cylinder to add air and pressurize cylinders. He claims this will make the boat float higher on the surface of the water. I don't agree with this. I think this will have no effect at all.

2007-05-27 16:10:21 · 13 answers · asked by Jack P 1

2007-05-27 15:40:33 · 6 answers · asked by Anonymous

2007-05-27 15:26:57 · 6 answers · asked by Anonymous

I'm thinking Clifford algebra. I'm wanting to go into quantum physics, quantum computing, etc. What would be the best route of doing that. Currently I'm learning the theories, I just need to get the math part down. Thanks in advance.

2007-05-27 15:15:08 · 3 answers · asked by Anonymous

2007-05-27 14:39:21 · 10 answers · asked by mike 2

Hi! I want to know how I can build (or buy) a time machine capable of traveling at least 25,000 years into the past and 800,000 years into the future.
(Like the one form H.G. Wells Time machine!)

2007-05-27 14:33:21 · 16 answers · asked by Anonymous

Suppose a company delivers 540kW of power at 12kV thru wires that have a total resistance of 2.5 ohms. How much power is saved by delivering the power at 87kV rather than 12kV?

I read in my textbook that {power lost due to heat} is proportional to R*I^2. I also know how to get the right answer. I just don't know why (I messed around with the numbers and somehow got the right answer).
The procedure to get the right answer is:
P = IV (what does P represent here?-power from where?)
(540kW) = I (12kV)
I = 45 A for the delivery at 12kV
Then: P = I^2*R = (45^2)(2.5) = 5062.5
Another question here: what does this P represent? Why are there 2 "P's" in the problem?

Repeat procedure for 87kV
P = IV
Solve for I.
Then: P = I^2*R = 96 A
Then the correct answer is obtained by subtracting:
5063 - 96 = 4967 = 4970 W
They give the answer as 4.97 kW.

2007-05-27 14:21:55 · 4 answers · asked by J Z 4

2007-05-27 13:28:43 · 8 answers · asked by Donald D 1

What is the difference between a cell and a battery?

Elctrons flow from the______?terminal to the _____ terminal?

What is the difference in terms of voltage, of connecting circuits in series or parallel?

Which circuit will produce bulbs that will burn at a higher intensity A or B?

2007-05-27 13:14:36 · 2 answers · asked by Anonymous

I would appreciate any helpful input on this physics problem. I am really confused on this one. Thanks for any help :)

Capacitors C1 = 4.0 µF and C2 = 2.0 µF are charged as a series combination across a 95 V battery. The two capacitors are disconnected from the battery and from each other. They are then connected positive plate to positive plate and negative plate to negative plate. Calculate the resulting charge on each of the capacitors (in µC).

I've gotten 84.44 for C1 and 42.22 or 168.89 for C2 and both are the wrong answer :(

2007-05-27 13:10:09 · 2 answers · asked by Anonymous

2007-05-27 13:08:00 · 4 answers · asked by Anonymous

Is the energy in our bulbs, fluorescent and/or incadescent, the same energy as in sunlight?

2007-05-27 12:32:41 · 6 answers · asked by Anonymous

2007-05-27 11:23:36 · 9 answers · asked by Donald D 1

2007-05-27 11:22:26 · 3 answers · asked by Anonymous

2007-05-27 11:04:17 · 6 answers · asked by mike 2

I'm looking for a blacklight flashlight, or just a water resistant lamp and bulb. I was wondering if I could look at HomeDepot or Lowes, and maybe perhaps Bass Pro Shops. I need this for tomorrow evening. Any ideas? Thanks!
-O.o

2007-05-27 10:46:24 · 3 answers · asked by Anonymous

I'm looking for a blacklight flashlight, or just a water resistant lamp and bulb. I was wondering if I could look at HomeDepot or Lowes, and maybe perhaps Bass Pro Shops. I need this for tomorrow evening. Any ideas? Thanks!
-O.o

2007-05-27 10:45:04 · 2 answers · asked by Anonymous

Question says it all really.

2007-05-27 10:34:38 · 4 answers · asked by darth_timon 3

Assume the planet has the diameter of Pluto- about 3,500KM. It doesn't matter too much how big the craters are, though if firepower varies wildly dependent on crater size, it's worth a mention. If possible, please provide answers in terms of megatons/gigatons, but if not, it's not a big deal.

2007-05-27 10:31:53 · 2 answers · asked by darth_timon 3

My sister said the molecules burst or something.

2007-05-27 09:52:08 · 5 answers · asked by rachel p 2

"without modern un-edenlike agriculture, the earth could only support a billion people or so"

2007-05-27 09:27:25 · 3 answers · asked by ỉη ץ٥ڵ 5

Was there any colaberation between Nicoli tesla and Albert einstein on the Philadephia project

2007-05-27 08:33:26 · 5 answers · asked by mic 4

2007-05-27 07:41:44 · 4 answers · asked by D 1

i am sittin in my room and can hear music which i think is from the hotel up the road but it is about a mile away. can wind carry this sound?

2007-05-27 07:40:49 · 8 answers · asked by fran b 1

this is for my physics class and soo far i have though of putting sand in the bottom with glass and then a mirror and putting a magnifying glass obove it so the heat can refelct and then a screen on the outsude to trap it and foil balls on the inside. So help me out yall!

2007-05-27 07:29:36 · 5 answers · asked by diamond 1

If I had "x" area of solar panels, could I increase the amount of power they make by focusing the amount of light by using a parabolic disc? If so, is there a limit to the amount of light?

2007-05-27 06:51:30 · 5 answers · asked by tony c 1