Physics - April 2007

It is said it is five times more massive than earth... so, would the gravity automaticly be 5 times more heavy too??

2007-04-25 02:13:53 · 4 answers · asked by freebird31wizard 6

2007-04-25 02:10:34 · 5 answers · asked by ckbijumaster 1

I always wondered why it was that very weak energies like radio waves can go through walls and very strong ones like gamma rays can as well, but visible light can not?

2007-04-25 02:10:30 · 1 answers · asked by ignorant 1

if it is possible to produce electromagnetic waves(light) by two perpendicular electric & magnetic fields,then why there aren't such bulbs or sources of light?

Can we produce light of any frequency with these two perpendicular fields?

2007-04-25 02:08:24 · 1 answers · asked by ignorant 1

The temp of a gas is now 400 K, raised from 300K. We have a Maxwell Boltzmann energy distribution function which is asymetric

Why would a chemical reaction proceed faster at a higher temperature? ( you may assume that the activation energy does not change significantly with temperature)

2007-04-25 01:39:27 · 2 answers · asked by TJ 3

Give 1 example of the application of streamlining and discuss.

2007-04-25 01:08:05 · 3 answers · asked by mocha 1

if the globe continuously rotated in different directions so the ground was always turning? ps. i mean if you were going backwards in time...

2007-04-25 00:44:47 · 3 answers · asked by Anonymous

In other words, what would be the time taken for me to travel at the speed of sound for 1 lightyear? What proportion of the speed of sound to the speed of light?

2007-04-25 00:43:42 · 9 answers · asked by Robin T 2

A very long, straight wire carries a current of 0.55 A. This wire is tangent to a single-turn, circular wire loop that also carries a current. The directions of the currents are such that the net magnetic field at the center of the loop is zero. Both wires are insulated and have diameters that can be neglected. How much current is there in the loop?

2007-04-25 00:33:33 · 1 answers · asked by Alan l 1

The magnetic flux that passes through one turn of a 12 turn coil of wire decreases from 11.0 Wb to 5.0 Wb in a time of 0.070 s. The average induced current in the coil is 190 A. What is the resistance of the wire?

2007-04-25 00:32:16 · 1 answers · asked by Alan l 1

If light acts both as a particle and a wave why can't it just be a particle that moves in the motion of a wave? There's no paradox! (Scientists wasting their time on more irrelevance it seems) Like a molecule (s) of water in an ocean current?


And how can photon have no mass yet it has a velocity? A =V squared and F=ma so F=mV*2 so M =F/V*2. If V= 0 then mass is null right? Does it exist? An electron has a mass right, so is a photon just pure energy or a particle with volume and dimensions in space time?

2007-04-25 00:03:28 · 4 answers · asked by Mr Jimmie 1

2007-04-24 23:35:33 · 3 answers · asked by bhiboy 1

2007-04-24 22:57:21 · 4 answers · asked by Soroush K 1

Say you are playing music through a speaker. You play a single note and the speaker responds to that one frequency. Now, if you play two notes together, the speaker alone produces what appears to be both sounds in unison although the speaker has a single cone generating the waves. Obviously, the cone cannot vibrate at two different speeds at once. I assume the same thing happens when sound hits your eardrums but what I'm really wondering is how a speaker (or eardrum) combines multiple frequencies so that they are all audible. And if I'm not hearing each individual pitch, then what am i hearing?

2007-04-24 20:36:15 · 5 answers · asked by Cameron 1

The formula for frequency in my book says 1/T but my teacher used a different one and I can't figure out what it is. He also used a different formula for wavelength! I have a test in 9 hours!

2007-04-24 19:47:39 · 5 answers · asked by Anonymous

#1) the gravitational force between two objects (mass1= 10 kg, mass2=6 kg) is measured when the objects are 10 centimeters apart. if the 10 kg is replaced with 20kg mass and the 6kg mass is replaced with 12kg mass, how does the new gravitational attraction compare to the first one measured?

#2)the gravitational force between two objects (mass1= 10 kg, mass2=6 kg) is measured when the objects are 10 centimeters apart. if the distance between then is increased to 40 centimeters, how does the new gravitational attraction compare to the first one measured?

#3) The gravitational force between two objects (mass1=1kg, mass2=2kg) is measured when the objects is reduced to 4 centimeters, how does the new gravitational attraction compare to the first one that was measured?

Please help me.... i really need to get these right! its very important and this is not my best subject..... And lots of other homework!!! please HELP!!

2007-04-24 19:27:50 · 4 answers · asked by nootherlikeme 3

WHAT ELSE I CAN DO BESIDE TEACHING, IF I WILL DO MY UNDERGRADUATION IN PHYSICS MAJOR AND MATH MINOR?
I AM TALKING ON FINANCIAL VIEW ...i.e. WHAT TYPE OF JOB CAN I GET?
IS IT GOOD IDEA (ECONOMICALLY) TO DO UNDERGRAD. IN PHYSICS AND MATH OR SOME OTHER ENGINEERING?

I APPRECIATE UR WORDS....

2007-04-24 19:20:41 · 4 answers · asked by eminent_youtom 1

If you place a bowling ball and a marble in a bed, the bowling ball will curve the bed, and the marble will fall towards the bowlng ball. However, that only works because of Earth's gravity. If we do the exact same experiment in space, the bowling ball will not curve the bed. And even, if an external force was to push the ball, and curve the bed, the marble will not fall towards the bowling ball, instead, it will just remain floatin on the same spot it was.

So how exactly does space curvature relate to gravity? Is there a force in space that acts like Earth's gravity in the case of the marble and the bowling ball?

Should we stick with gravitons?

2007-04-24 18:51:16 · 10 answers · asked by Anonymous

what difference it makes when smallest fraction of time changes.what is that fraction ,how we can define the fraction.

2007-04-24 18:36:25 · 8 answers · asked by psokullu 2

it s a hw question ..........

A sound wave in air has a frequency of 262Hz and travels with a speed of 330m/s. How far the wave crests( compressions)?

2007-04-24 18:33:56 · 3 answers · asked by Anonymous

what are three thing to whom we are not able to see. they are not in land nor in sky.
may one of three is "AIR or WIND" we can't see them.
if u know other two pls intmate me.


regards

amit

2007-04-24 18:29:51 · 5 answers · asked by amitdelpanwar 1

2007-04-24 17:55:51 · 7 answers · asked by Joseph 2

The maximum intensity of light from a star occurs at a wavelength of 8.09 x 10-7 meters. Use Wien's Law to calculate the surface temperature of the star in degrees Kelvin.

2007-04-24 17:52:59 · 2 answers · asked by triality159 1

I had to host the question as a image file because I couldn't fit all the info on this area, the answers are given under each question, but I don't know how to get there because I'm a new student in physics, Thanks in advance, its much appreciated!

http://img167.imageshack.us/img167/7384/mechanics2bp2.jpg

2007-04-24 17:52:50 · 1 answers · asked by Anonymous

Newton predicted that if the sun is gone the planets would instantly fly out of their orbits. Drifting off into space in a stright line. Newton thought the gravity was the force that acts instantaniously across any distance with mass or volume.
Einstein saw a big problem with Newtons theory a problem that aroused from his work with light. Einstein knew that light doesn't travel instantaniously in fact it takes 8mins for the suns rays to travel to 93mill/miles Earth. He shown that nothing, not even gravity can travel faster than light. How can the Earth be release from its orbit before the darkenss resulting from the from the sun's absence reach our eyes?
Anything that outruns light is impossible that ment Newton. the 4D of space a single Dimention of time has bond togather a frabric of space. To understand this Einstein has to use geometry to understand this. Things move along this fabric of space time. Like the surface of a trampoline. Is morph & strech by heavy objects like stars

2007-04-24 17:51:42 · 9 answers · asked by Anonymous

Can someone tell me if what I am thinking is right or correct me or give feedback: Ultimately the limiting factor in how fast a car can accellerate is the tires. If the tire increases in speed too rapidly the tire will lose traction and the car will not accellerate. So in theory if we had a weightless 2 million horsepower engine in a car it would not accellerate any faster than a weightless 1 million horsepower engine in the same car. There is a maximum possible acceleration for every car considering its weight and body design. Eh?

2007-04-24 17:50:28 · 3 answers · asked by joe 1

2007-04-24 17:46:39 · 7 answers · asked by indranath 3

Air streams horizontally past a small airplane's wings such that the speed is 75.0 m/s over the top surface and 57.0 m/s past the bottom surface.
The plane has mass 1420 Kg and a wing area of 16.1 m^2 , The density of the air is 1.20 kg/m^3.

2007-04-24 17:41:05 · 1 answers · asked by Devin B 1

P = mL, where P is the power of the heater and m is the mass of water evaporated per second.

1. the gradient of 9.52 to determine a value for the specific latent heat
of vaporization of water.

2. The theory of the experiment would suggest that the graph line should pass through the
origin. Explain briefly why the graph does not pass through the origin.

2007-04-24 17:38:47 · 1 answers · asked by Anonymous

A cannonball and a marble roll from rest down an incline without sliding. Does the cannonball take more, less, or the same time as the marble to reach the bottom? Is the fraction of the cannonball’s kinetic energy associated with translation more than, less than, or the same as that of the marble?

2007-04-24 17:37:47 · 3 answers · asked by Anonymous