Physics - June 2007

How you can use machines to help lift things
What machines are helpful for lifting and why

What are gears?
How they turn?
What they are used for?
How car brakes work?

2007-06-12 10:42:03 · 2 answers · asked by aipingd 1

2007-06-12 10:34:11 · 6 answers · asked by Kie Kie 1

The question is:
If you separated the elements of the product of this reaction, which type of reaction would this be?

The equation is this:
2H2 + O2 = 2 H2O

2007-06-12 10:03:45 · 2 answers · asked by Lizzie 5

What explanation do you have for this? Please Help.

2007-06-12 09:35:49 · 4 answers · asked by manuawal 2

2007-06-12 09:15:06 · 3 answers · asked by Alexander 6

2007-06-12 08:57:43 · 4 answers · asked by puma 1

When you shoot a bullet from a train that moves as fast as the bullet would come out of a gun, but in opposite direction. Would the bullet just drop on the floor, without foreward motion relative to the ground? Let's make that a vacuum space this all happens in. :-)

2007-06-12 08:44:50 · 11 answers · asked by Anonymous

2007-06-12 08:44:26 · 6 answers · asked by Alexander 6

Balance the following chemical reaction equation:

H2 (g) + O2 (g)  H2O (l) (3 pts.)

I'm not to good with equations, Can someone direct me how to solve this?

2007-06-12 08:43:45 · 3 answers · asked by Lizzie 5

2007-06-12 08:36:32 · 5 answers · asked by Lee Edward 1

2007-06-12 08:30:28 · 4 answers · asked by Lee Edward 1

Please don't give me a rational answer. If you do it means you haven't understood the question. At one time 'learned' men argued over how many Angels could sit on the head of a pin.
My two year old Grandson has just given me the right answer.

2007-06-12 07:45:20 · 10 answers · asked by fred 1

In the photoelectric effect an electron can absorb a photon.

I was just wondering can a Proton and/or Neutron absorb a photon aswell, and if so what happens.

A named phenomonon wouldn't harm either (pending on whether there was one or not).

Thanks. Me.

2007-06-12 07:38:41 · 3 answers · asked by Anonymous

According to Bernoulli principle the faster gas moves, the
lower is its pressure acting on the surface of rocket nozzle.
The force of thrust is equal to pressure x nozzle area.

2007-06-12 07:06:53 · 6 answers · asked by Alexander 6

A small, light ball S and a large, heavy ball L move toward each other, collide, and bounce apart.

Sketch a graph showing a plausible F(S on L) as a function of time and another graph showing a plausible F(L on S) as a function of time. Be sure to think about the sign of each force.

2007-06-12 07:03:18 · 5 answers · asked by Anonymous

If th behavior of a system is measured exactly and understood for a period of time, does it follow that in the future behavior of that system can be predicted? (Is there a difference between predictability and measurable properties?)

2007-06-12 06:50:34 · 2 answers · asked by Anonymous

2007-06-12 06:49:40 · 5 answers · asked by Anonymous

Like octogons

2007-06-12 06:38:18 · 3 answers · asked by Alexander 6

2007-06-12 06:15:21 · 6 answers · asked by Clark Kent 1

2007-06-12 04:43:01 · 4 answers · asked by patty 1

2007-06-12 04:24:43 · 9 answers · asked by Kerri L B 1

http://www.wedigtv.com/catchphrase/message/show.php?id=162602684

2007-06-12 04:21:32 · 6 answers · asked by John B 1

Breeder reactors generate more fuel than they consume. Is this a violation of the conservation of energy? Explain please.

2007-06-12 04:21:07 · 3 answers · asked by Anonymous

how does this happen?

2007-06-12 04:11:47 · 9 answers · asked by linkmasta23 2

2007-06-12 04:05:42 · 9 answers · asked by shed1uk 1

2007-06-12 03:42:50 · 2 answers · asked by chrisz1059 1

2007-06-12 03:37:06 · 11 answers · asked by Light_head2001 2

If you're on an airplane that is traveling the speed of sound, and were in the back of said plane and decided to run to the front, would you be going faster than the speed of sound?

2007-06-12 03:18:13 · 25 answers · asked by Baird 1

The hot air inside the balloon has a density of 0.79 kg/m3, and the cool air outside the balloon has a density of 1.29 kg/m3.

(a) What is the algebraic expression for the upward acceleration ay of the balloon? Express your answer in terms of the density ρC of the cool air outside the balloon, the density ρH of the hot air inside the balloon, and the magnitude g of the acceleration due to gravity. Upward is the positive direction.
(b) What is the upward acceleration ay of the balloon?

Thanks...

2007-06-12 03:10:56 · 4 answers · asked by Anonymous

2007-06-12 02:59:50 · 4 answers · asked by AZ-time 1