Physics - June 2007

If it did would it produce dark light? and explaine dark energy and dark matter,

2007-06-27 11:17:28 · 5 answers · asked by Anonymous

how do I verify that with physichs formulas?

2007-06-27 11:15:06 · 2 answers · asked by aoc10010001100 2

A student eats 2100 kcal per day.

(a) Assuming that all of the food energy is released as heat, what is the rate of heat released? (Recall that 1 W = 1 J/s.)
_______W

(b) What is the rate of change of entropy of the surroundings if all of the heat is released into air whose temperature is 4°C?
_______W/K

2007-06-27 11:14:08 · 1 answers · asked by salvnjc4ever 1

A heating coil inside an electric kettle delivers 2.8 kW of electrical power to the water in the kettle. How long will it take to raise the temperature of 0.50 kg of water from 29.0°C to 72.0°C?

2007-06-27 11:09:01 · 2 answers · asked by Ciel S 1

2007-06-27 11:05:20 · 19 answers · asked by masonv80 3

Any info on black holes would be good too!

2007-06-27 10:42:06 · 5 answers · asked by nuander 2

I know that Big Bang is the most convincing, in terms of Logic and reasoning, and a lot of physics. But from what i have learnt in my physics lessons. Big still contradicts some factors like, lets say for eg: Some stars in the universe are older than the Big Bang? Now i want some real good contradictions in terms of Science and not silly stuff. Tell me why Big is not so convincing to Scientists yet? Arrhh!! and dont tell me, its becuase relgious people are hard nuts. plzzzz. Dont waste ur time and mine. Scientific Contradictions!!!!

2007-06-27 10:39:58 · 5 answers · asked by john_stephenraj2000 2

An engine works at 28.0% efficiency. The engine raises a 5.00 kg crate from rest to a vertical height of 10.0 m, at which point the crate has a speed of 5.00 m/s. How much heat input is required for this engine?

______Joules

2007-06-27 10:01:46 · 2 answers · asked by terra_flare_aqua_ciel 1

An ideal spring with a spring constant of 18 N/m is suspended vertically. A body of mass 0.60 kg is attached to the unstretched spring and released.

What is the extension of the spring when the speed is a maximum?

What is the maximum speed?

2007-06-27 09:57:53 · 3 answers · asked by terra_flare_aqua_ciel 1

knives, pliers, rings, screwdrivers, fingernail clipers. almost everything made of metal that i have becomes magnetic. is this normal, and why does it happen?

2007-06-27 09:56:42 · 3 answers · asked by Anonymous

At some point we will be able to pop Big Bangs like popcorn, will we not?

2007-06-27 09:48:34 · 7 answers · asked by Alexander 6

2007-06-27 09:20:23 · 10 answers · asked by snstv_lion 1

Do u know of any particle without spin but carring charge?

2007-06-27 09:12:42 · 2 answers · asked by Anonymous

I know it is not possible to create matter out of nothing.

However, suppose a mass was suddenly created out of nothing one light second (3 million km) from the earth. How long before it exerted its gravitational pull on the earth?

2007-06-27 08:46:27 · 13 answers · asked by Anonymous

2007-06-27 08:43:22 · 8 answers · asked by Sophos 2

The process of charging a conductor by bringing it near another charged object and then grounding the conductor is called

2007-06-27 08:28:33 · 2 answers · asked by Anonymous

Ball 1 has a negative charge, and ball 2 is repelled by ball 1. Next, you see that ball 2 repels ball 3 and that ball 3 attracts ball 4. What is the electric charge on ball 4?

2007-06-27 08:24:44 · 2 answers · asked by Anonymous

Does anybody know if there were any inventions made as a result of the lightbulb?
Thanks

2007-06-27 08:17:31 · 7 answers · asked by Anonymous

Adjacent antinodes of a standing wave on a string are a distance 15.00 cm apart. A particle at an antinode oscillates in simple harmonic motion with amplitude .8500 cm and period .0750 s. The string lies along the + x - axis and is fixed at x=0.

At time t=0, all points on the string are at their minimum displacement.

Find the displacement of a point on the string as a function of position and time. (in meters) in the form {y(x,t)=}

Find the speed of propagation of a transverse wave in the string. (m/s)

Find the amplitude at a point a distance 3.0 cm to the right of an antinode. (in meters)

thanx in advanced!

2007-06-27 08:05:40 · 3 answers · asked by jethaz 2

acoustics, Hertz and freqs and light waves etc etc etc and by studying Pythagoras, its easy to see that the ancient Greeks pretty much thought of all this stuff before and understood UHF,VHF,ULF. what do you think?

2007-06-27 08:05:12 · 2 answers · asked by Anonymous

2007-06-27 07:53:38 · 4 answers · asked by starcookie3 1

In the scientheists view, that science answers and solves everything, what universal particles combined to create a magnetic repell/attract reaction becomming the heartbeat reaction of humans and hence soul of humans, ceasing to repell/attract uniformly due to earth's yearly gravity and axis shifts, making a humans repell/attract heartbeat/soul reaction become offcenter, and thus 'dying' or defusing its magnetice process?

Share your ideas.

2007-06-27 06:51:12 · 6 answers · asked by littleblanket 4

A block of mass 4.764 kg is relased on the track at a height of 4.46 m above the level surface. It slides down the track and makes a head on elastic collision with a block of mass 14.292 kg, initially at rest. The acceleration of gravity is 9.8 m/s^2. Calculate the height to which the block with mass 4.764 kg rises after rebounding from the collision.

2007-06-27 06:41:02 · 1 answers · asked by NATTY 1

Say I got a steam engine that was rated at 5000 horsepower and put on tracks going one way and secured it to 5000 horses going the other way. Assuming the horses and then engine were both preforming at full power, who would begin to pull who?

2007-06-27 06:21:57 · 9 answers · asked by Anonymous

Erwin Schordinger, an austrian physicist famous for his theory of wave equations, his name Schordinger is always written with two dots on top of O, why is that?

2007-06-27 05:54:08 · 11 answers · asked by deepak_hellboy 1

i have a paintball gun and it is powered with a 4500psi tank and i wanted to know what would happen if the hose split and blew 4500psi onto my arm if anything and just the air not if anything comes flying out with the air

2007-06-27 05:50:33 · 8 answers · asked by get_lost23 1

What is the mechanism involved for the aeroplane to move up?
You can take into granted that I know the basic terms........................gravity, air resistance etc..

I want to know exactly what is making the airplane to move up after attaining considerable speed on the ground.

2007-06-27 05:39:40 · 10 answers · asked by DON 1

Seems like whether you get up to speed quickly or slowly it should take the same amount of fuel.

2007-06-27 05:23:03 · 6 answers · asked by timssterling 4

Blaise Pascal duplicated Torricelli's barometer using a red Bordeaux wine of density 969 kg/m3, as the working liquid...What was the height h of the wine column for normal atmospheric pressure in meters?

2007-06-27 05:06:38 · 3 answers · asked by Chablisah 1

The best answer get the points.

2007-06-27 04:38:37 · 23 answers · asked by ... 3