Physics - January 2007

While watching football one of the commentators made the statement, "That will throw some cold water on their fire". My husband then asked, does the temperature of the water really make a difference? Won't any water thrown on the fire have the same effect? My Father in Law thinks it will have a different effect. My husband and I both think water is water and will have the same effect. But I also think that cold water will also cool embers and any rocks that were in the fire. Along with the wood. Thus cooling the remains quicker.

Now I want your thoughts on this oh so pressing matter.

2007-01-13 11:00:26 · 7 answers · asked by Amy R 4

Plaskett's binary system consists of two stars that revolve in a circular orbit about a cnenter of mass midway between them. This means that the masses of the two stars are equal. If the orbital velocity is 220000 m/s and the orbital period of each is 1546560 sec, find teh mass M of each star. please include details!!!

2007-01-13 10:29:23 · 4 answers · asked by Anonymous

Please answer whoever knows a lot about science!! I really need information about her and the name for a project!

2007-01-13 10:27:23 · 6 answers · asked by Cat 2

The idea is that if you're moving faster than light you are able to be at a location before light has reached it and therefore before the event occurred.

2007-01-13 10:26:56 · 3 answers · asked by flongkoy 2

A mower's dolly is used to transport a refrigerator up a ramp into a house. The refrigerator has a mass of 115 kg. The ramp is 2.10 meters long and rises 0.850 meters. The mover pulls the dolly with a force of 496 N up the ramp. The dolly and ramp constitute a machine.

a. What work does the work do?
b. What is the work done on the refrigerator by the machine?
c. What is the efficiency of the machine?

Please help me with this question.
I'm having trouble understanding it.

2007-01-13 10:20:37 · 2 answers · asked by vicky p 1

regarding to "On the Conservation of Force" by Hermann von Helmholtz

thank you!

2007-01-13 09:56:10 · 3 answers · asked by Anonymous

The length of a simple pendulum is 0.75 m, the pendulum bob has a mass of 312 grams, and it is released at an angle of 11° to the vertical.

2007-01-13 09:35:13 · 2 answers · asked by 3ajeeba_q8 2

2007-01-13 09:34:15 · 3 answers · asked by Anonymous

2007-01-13 09:33:54 · 10 answers · asked by Anonymous

2007-01-13 09:33:09 · 3 answers · asked by micropterushunt 2

When I make noodles, I have the noodles in the water, and the heat is on enough to keep the water at a boil, and steam comes up out of the pot at a constant rate. Pretty normal. When the noodles are done and I turn the heat off, the amount of steam coming out of the pot suddenly increases. I've noticed that this behavior is independent of the presence of noodles in the water.

2007-01-13 09:02:19 · 4 answers · asked by Tony Hex 1

2007-01-13 08:28:19 · 4 answers · asked by alexander b 1

Determine the amount of spring compression necessary to fira a projectile a certain horizontal distance and determine how the firing angle plays a role in the horizontal range of the projectile. Then you need to prove your calculations by demonstrating your projectile launcher's accuracy by hitting a pre-determined target. Good Luck!

2007-01-13 08:09:27 · 5 answers · asked by jay z 1

What's the worst that could happen to them (other than death)? What's the best outcome?

How about four stories?

2007-01-13 08:06:29 · 6 answers · asked by Kiwi K 1

Do different colours of light travel at different speeds? If so, what colours travel faster and what colours travel slower?

2007-01-13 07:57:29 · 5 answers · asked by Amy 2

2007-01-13 07:46:55 · 9 answers · asked by mhiszcee 3

,,,in space and on earth. What could the quantity be of whatever is between known matter ?

2007-01-13 06:39:23 · 11 answers · asked by Anonymous

Eg the physics of the particles, skin sparing, penetration etc

2007-01-13 06:25:08 · 1 answers · asked by Lozzie 2

2007-01-13 06:24:57 · 15 answers · asked by Anonymous

2007-01-13 05:59:28 · 8 answers · asked by h_m_fire_eyes 1

answers should be given before 15 of january

2007-01-13 05:29:55 · 7 answers · asked by pithu is cool 1

I need a simple example that uses all three of the Laws of Motion. I can't think of one. Thanks!

2007-01-13 05:23:35 · 6 answers · asked by Emily G 1

2007-01-13 05:17:17 · 8 answers · asked by JAMES 4

2007-01-13 05:12:22 · 13 answers · asked by h_m_fire_eyes 1

i am 16yrs old. i want to be a scientist in the field of particle, nuclear and astro physics.

2007-01-13 05:06:48 · 12 answers · asked by PCMCPPE 1

2007-01-13 04:48:49 · 3 answers · asked by eilea w 1

...was thinking of a 'gravity harvester', if you dropped water far enough into a hole then at some point you would 'harvest' enough potential energy through hydro-electric means to convert that same water into hydrogen and oxygen. This hydrogen could then naturally rise back to the top through displacement to be converted back into water to start the cycle again. The conversion would be your free energy. Although in reality I'm wanting somebody to point out the flaw in the idea as it must be complete balls or we would be doing it.

2007-01-13 04:32:45 · 14 answers · asked by Alan R 1

Just as an amateur I wonder what happens at a center of a planet gravity. The standard picture where space curves like a \/ due to gravity or the curve beeing the gravity puzzles me about what do happen at the \/ center to were all the "force" converge. Can it be possible it reflects up to a small distance as anti-gravity? instead of just be confined to a point, just move on? as long it move pass that point it would be pushing not pulling, just because of beeing past the center of gravity. Is there anyone this also makes sense?

2007-01-13 04:16:33 · 3 answers · asked by fometeo 1

Electrons move at about the speed of light around a nucleus. Because their mass is almost zero, it would seem if we could move at the same speed as them, we would go right through them.

2007-01-13 04:15:16 · 5 answers · asked by monkeymanx8 1

2007-01-13 03:59:16 · 7 answers · asked by Anonymous