Physics - May 2007

an object will normally be a net radiator of energy when its temperature is..
a)higher than its surroundings
b) lower than its surrounding
c) neither of these

2007-05-26 04:05:36 · 3 answers · asked by Anonymous

2007-05-26 04:00:06 · 4 answers · asked by pandia 1

2007-05-26 03:49:02 · 6 answers · asked by Anonymous

Include: reaction time, friction, condition of tyres and breaks / aerodynamics etc

2007-05-26 03:32:25 · 3 answers · asked by Anonymous

Apparently there is a theory that suggests there is no such thing as light only dark, a heavy,thick matter that moves faster than "light". Is there any basis for this theory?
The example I read about was that a candle wick turns black because of all the dark it has sucked out, while a lightbulb greys over time. But surely string will turn black if it smoulders and hardly emits any light while the evaporated tungsten in bulbs is what causes them to grey.
Who came up with this theory and how does it work? I'm open to believe that anything is possible, I even think that when you have the window open on a dark night it does seem as if the dark seeps in so whats the answer!?

2007-05-26 03:30:53 · 9 answers · asked by betty 3

a dam is thicker at the bottom than at the top partly because..
a)water is dancer at deeper levels
b)water pressure is greater with increasing depth
c) surface tension exits only on the surface of liquids
d) it looks better
e) non of these

2007-05-26 03:06:14 · 5 answers · asked by Anonymous

why is that visible light can pass through transparent objects but not opaque ones?

2007-05-26 02:37:21 · 5 answers · asked by formystudies6 1

what are the applications of newton's second law of motion?

2007-05-26 01:03:51 · 6 answers · asked by kairrizordick 1

are there any new discovery using newton's law of motion?

2007-05-26 01:00:28 · 5 answers · asked by kairrizordick 1

I know that Newton's formula is : F= (G*M*m)/ d2
mathematicly if the distance is 0 the force will be infinite is that true in small things>> if we succed in confusing two gravity points of two objects will it be an infinit force.... sure not ... but why

2007-05-26 00:20:38 · 4 answers · asked by einstein is back 1

ok....i've this idea in my head which's revolutionary.....i cant do it practically coz i think i dont have the resources OR the theory is wrong
Any how i've verified this concept with 2-3 people one of whom is a MSC in physics.....none of them disagree with it....actually its hard to disagree with the concept.....there is not 1 -point.

got any ideas??.....age = 18

education = 12 grade

also wat will be the financial requirements??

2007-05-26 00:19:10 · 3 answers · asked by Anonymous

A sinusoidal transverse wave is traveling on a string. Any point on the string:

a) moves in the same direction as the wave
b) moves in simple harmonic motion with a different frequency than that of the wave
c) moves in simple harmonic motion with the same angular frequency as the wave
d) moves in uniform circular motion with a different angular speed than the wave
e) moves in uniform circular motion with the same angular speed as the wave

2007-05-25 21:42:09 · 5 answers · asked by woody56 1

You are listening to an "A" note played on a violin string. Let the subscript "s" refer to the violin string and "a" refer to the air. Then:

a) fs = fa but λs ≠ λa
b) fs = fa and λs = λa
c) λs = λa but fs ≠ fa
d) λs ≠ λa and fs ≠ fa
e) linear density of string = volume density of air

2007-05-25 21:39:07 · 2 answers · asked by mary j 1

2007-05-25 21:09:03 · 2 answers · asked by Anonymous

2007-05-25 20:47:11 · 5 answers · asked by Anonymous

show by the vector method that the conditions of the diagonals of a parralelogram to be mutually perpendicular are that the adjacent sides are equal in lenght

2007-05-25 19:26:43 · 5 answers · asked by Anonymous

2007-05-25 19:01:52 · 9 answers · asked by enriqueboy 2

2007-05-25 18:59:34 · 8 answers · asked by yeeballer1 2

2007-05-25 18:40:40 · 10 answers · asked by rudz 2

... and the ground would be firm enough, will I be able to roll the earth? What if i push it, etc??

2007-05-25 18:08:45 · 4 answers · asked by juker 1

I have a new theory relating to physics which i need to reviewed in order to get it published without any danger of piracy.I need your help specially one related to this field.

2007-05-25 17:43:38 · 3 answers · asked by umesh the unconventional 2

who am i

2007-05-25 17:38:09 · 3 answers · asked by Anonymous

2007-05-25 17:26:45 · 6 answers · asked by Thepacifier 1

The earth orbits the sun once a year (3.16 107 s) in a nearly circular orbit radius 1.50 1011 m. With respect to the sun, determine the following.
(a) the angular speed of the earth
______rad/s

(b) the tangential speed of the earth
______m/s

(c) the magnitude and direction of the earth's centripetal acceleration
magnitude _______m/s2
and the direction???

2007-05-25 14:32:44 · 3 answers · asked by Anonymous

Religion and politics is based on belief. Science, unlike religion, does not depend on belief but on healthy skepticism.

In the current global warming debate, Inquisition like behavior occurs to stifle the scientific process and bury views that do not agree with an "authority sanctioned" view point, with the Church replaced by the IPCC. Remember what happened to Galileo and Bruno? This has happened in the past and people were called heretics and in another age, witches. Today they may be called incorrectly "religious conservatives." The scientist being attacked could very well be an evironmentalist and liberal. It is unfair to label someone as something they are not just because they are trying to do honest research.

Science is based on the scientific method and not on consenses. For any hypothesis, there is going to be an antithesis. We went through the Enlightenment to free ourselves from the Church, we don't need a new Church of IPCC to replace it.

2007-05-25 13:55:02 · 4 answers · asked by Anonymous

We all know the saying that as an object approaches the speed of light, the mass of the object approaches infinity.

From there it can be inferred that the faster an object goes, the larger its mass.

Now, as an object is reaching high speeds, where does its extra mass come from? Is that just energy transforming into mass? And what is that mass made of? Is that new mass just copies of whatever atoms and molecules the object is made of?

2007-05-25 13:25:26 · 9 answers · asked by Anonymous

i want a book relatively in laymens terms, and i want it curret to our time and discusses the nature of reality. for example is it a concept in our minds eye? is it solid? does matter exist etc.

but no pseudo science. i just want the facts.

2007-05-25 13:05:35 · 3 answers · asked by Anonymous

If a magnetic compass needle points north, what is the actual polarity of Earth's northern magnetic pole? Explain.

2007-05-25 12:59:01 · 3 answers · asked by Anonymous

The following question was asked of me on my Physics final. Can someone give me a good, detailed explaination? I figured Archimedes' or Bernoulli's principle..

http://farm1.static.flickr.com/182/442622526_1dbbcadb0c_o.jpg
Have you ever seen a WATER bridge over a river? Even after you see it, it is still hard to believe! This is the Water Bridge in Germany … What a feat! Six years, 500 million euros, 918 meters long… now this is engineering! This is a channel-bridge over the River Elbe and joins the former East and West Germany , as part of the unification project. It is located in the city of Magdeburg, near Berlin . The photo was taken on the day of inauguration.

To those who appreciate engineering projects, here’s a puzzle for you armchair engineers and physicists. Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, or just the weight of the water?

2007-05-25 10:28:51 · 3 answers · asked by Phillipa Chicken 1

a horse pulls a heavy cart with a certain force. the cart, in turn, pulls back with an opposite but equal force on the horse. doesnt that mean the forces cancel one another, making acceleration impossible? yes or no.

2007-05-25 10:01:03 · 5 answers · asked by Anonymous