Physics - April 2007

2007-04-28 14:12:19 · 4 answers · asked by Kari *** 1

to stop hearing the voices

2007-04-28 13:31:30 · 3 answers · asked by Anonymous

i dont know if it is cellular waves or radio waves but I constantly
hear voices--I think people are playing games

2007-04-28 12:51:40 · 4 answers · asked by Anonymous

Alpha particles (Helium atoms with the two electrons missing) of charge q = +2e and mass m = 6.6E-27 kg are emitted from a radioactive source at a speed of 1.46E+7 m/s. What magnetic field strength would be required to bend these into a circular path of radius r = 0.16 m?

Protons move in a circle of radius 4.40 cm in a 0.557 T magnetic field. What value of electric field could make their paths straight?

I need to know how to answer these problems. I am really lost on how to solve these magnetism problems.

2007-04-28 11:52:38 · 3 answers · asked by Anonymous

tiny particles, like tiny bells, scatter high-frequency waves more than low-frequency waves. Large particles, like large bells, mostly scatter low frequencies. Intermediate-size particles and bells mostly scatter intermediate frequencies. what does this have to do with the whiteness of clouds?

2007-04-28 11:19:22 · 5 answers · asked by Vienna 3

2007-04-28 10:33:42 · 2 answers · asked by clintfrerich 1

2007-04-28 10:29:52 · 8 answers · asked by me 1

when astronomers observe a super nova explosion in a distant galaxy, they see a sudden, simultaneous rise in visible light and other forms of electromagnetic radiation. Is this evidence to support the idea that the speed of light is independent of frequency? Please Explain.

2007-04-28 09:53:25 · 4 answers · asked by Vienna 3

I would appreciate ur answer

2007-04-28 09:43:40 · 4 answers · asked by lebron james 2

In 9.99 s, 217 bullets strike and embed themselves in a wall. The bullets strike the wall perpendicularly. Each bullet has a mass of 5 x 10-3 kg and a speed of 1170 m/s. (a) What is the average change in momentum per second for the bullets?

2007-04-28 09:21:10 · 2 answers · asked by Hilary R 1

Usually the side of an object facing the beam is illuminated therefore making the beam more visible if it's direction of travel is away from you. However in the case of the laser during fog or heavy smoke the laser is more clearly seen when it's direction of travel is toward you as if it illuminates the back sides of microscopic particles in the air. how is this possible and why?? this would almost make laser sights for guns more dangerous for the user cause it'll identify clearly tot he opponent where your location is.

2007-04-28 09:13:02 · 4 answers · asked by Anonymous

2007-04-28 08:52:10 · 5 answers · asked by Anonymous

When the ice melts, the level is the same, because ice displaces water by weight. Other than land glaciers melting, much of whose water will go into groundwater, why is the ocean predicted to rise to such degrees with global warming?

2007-04-28 08:49:04 · 3 answers · asked by SQD 2

2007-04-28 08:41:11 · 2 answers · asked by Anonymous

2007-04-28 08:19:08 · 5 answers · asked by twilightfoxangel 1

when we throw an object vertically up , will the time of ascent be equal to the time of descent... doesnt that depend upon the force by which we r throwing

2007-04-28 07:34:37 · 12 answers · asked by Anonymous

2007-04-28 07:32:09 · 19 answers · asked by goody2shoes 1

2007-04-28 06:46:25 · 4 answers · asked by kaveman104 2

although there may be other beings or mammals on other stars or planets millions of miles away,is it possible that somewhere life exists?

2007-04-28 06:37:04 · 13 answers · asked by Anonymous

I'm doing a planning exercise about wavelengths of nature sunlight. Could anybody explain for me, how to measure the wavelengths of sunlight please? thank you

2007-04-28 06:34:56 · 4 answers · asked by monarcharthas89 2

although there are lots of answers to this question no one seems to know what gravity is?

2007-04-28 06:33:25 · 17 answers · asked by Anonymous

Why does the proton have the elementary charge?

2007-04-28 06:31:06 · 5 answers · asked by Andrew H 2

Q1 : what colnclusion can you deduce from the graph?

[it is in diret proportion and does not go through its origin
x-axis= 1/suare root of N(corrected count in 100s)
y-axis= d/m(distance of gamma radiation from its measurement)]

Q2. Give a numerical example of the inverse square law.

plz help me to finish my assessment!! thanks.

2007-04-28 06:29:33 · 1 answers · asked by Anonymous

2007-04-28 06:25:28 · 1 answers · asked by 007dragoon 1

Which best expresses the value for the coefficient of volume expansion, β, for given material as a function of its corresponding coefficient of linear expansion, α?

a. β=α^3
b. β= 3α
c. β=α^2
d. β=2α

Reason why?

2007-04-28 05:18:21 · 7 answers · asked by Lakers 1

For an object-spring system on a horizontal frictionless table, describe mathematically, an equation relating its velocity with displacement. Draw schematics showing the displacement, velocity, and acceleration versus time for an object-spring system as described above, moving with simple harmonic motion.

2007-04-28 05:12:13 · 1 answers · asked by Lakers 1

if gravity distorts space, why do we notice its effects? since we are inside the space, should we distort along with it and not notice any difference?

why do objects seem to move together when in eachothers field of gravity? should the space between not be observed the same eventhough it stretches?

2007-04-28 04:56:05 · 8 answers · asked by mrzwink 7

A lead ball, with an initial temperature of 25.0 deg. C, is released from a height of 115.0 m. It does not bounce when it hits a hard surface. Assume all the energy of the fall goes into heating the lead. Find the temperature (in degrees C) of the ball after it hits. Data: clead = 128 J/kgoC.

2007-04-28 04:37:42 · 3 answers · asked by Anonymous

2007-04-28 04:19:40 · 20 answers · asked by T O 1

Given that water (pure?) boils at 212 degrees Fahrenheit at sea level (standard atmospheric conditions?) is there a standard for the decrease in boiling point with each (1,000 ft) increase in altiutde? I live at 7,150 feet (+ or -) and an ordinary kitchen cooking thermometer shows the water boiling at 198 degrees. If you could take a quantity of water continually higher, at what point in elevation would the water "boil" off without an application of heat/energy to it?

2007-04-28 03:48:10 · 9 answers · asked by Homey 2