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April 21, 2014

Search: magnetism

Number of results: 139

physics
explain the close relationship between magnetism and electricity? and How can electricity produce magnetism, and magnetism produce electricity.
Friday, July 3, 2009 at 3:24pm by Leslie

Science
A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile. What best describes? A. Solution or iron and sulfer can be seperated...
Sunday, October 20, 2013 at 6:50pm by Brianna

Science
Name and describe two ways in which magnetism is used in technology related to medicine? Im really not sure of the answer to this, but i do know that magnetism is the force of attraction or repulsion.
Monday, April 7, 2008 at 9:03pm by Jenna

Ivy Tech
Both permanent magnetism and electromagnetism results from the motion of electrons. Positive ions such as protons can produce magnetic fields also, but they are not a major source of magnetism.
Friday, March 26, 2010 at 11:51pm by drwls

science
Look at the picture on the immediate left here: http://en.wikipedia.org/wiki/Earth's_magnetic_field Also: http://image.gsfc.nasa.gov/poetry/magnetism/magnetism.html HOW IS THE EARTH'S MAGTISM USEFUL thanks it helped me alot!!!!!!!!!!!
Tuesday, December 12, 2006 at 8:47pm by Lance

Science - Physical
Why confused? This is an experiment that will take you several days. Just follow the directions above. You'll need a coompass and a marker. Try some of the following sites on magnetism, especially the one about shifting poles: http://search.yahoo.com/search?fr=mcafee&p=...
Sunday, March 13, 2011 at 12:27pm by SraJMcGin

Science; magnets
I know that magnets are attracted to iron. I don't know the proccess of how magnets stick to something. I also need to know more sciency magnet words like magnetism and ferrous.like that. what is magnetism. stuff like that. i need help because I might fail the pssa. i dont ...
Monday, March 26, 2012 at 7:10pm by Celest

Science
Where does magnetism comes from? Magnetic forces arise from the movement of electrons (electric charge). In case you want it, here is more information on magnetism. http://en.wikipedia.org/wiki/Magnetism http://www.phy6.org/Education/Imagnet.html http://www.factmonster.com/ce6...
Tuesday, April 17, 2007 at 6:52pm by Help

science
Since this is not my area of expertise, I searched Google under the key words "magnetism" to get these possible sources: http://en.wikipedia.org/wiki/Magnetism http://www-istp.gsfc.nasa.gov/Education/Imagnet.html http://www.school-for-champions.com/science/magnetism.htm http...
Monday, January 7, 2008 at 12:02pm by PsyDAG

science
http://science.howstuffworks.com/magnetism-info2.htm
Sunday, April 22, 2012 at 8:45pm by Ms. Sue

magnetism
It'swrong!!
Friday, November 29, 2013 at 7:09am by manu

Magnetism
Great, thanks a lot!
Thursday, February 10, 2011 at 6:01am by Ben

Science
size of what? Magnetism of what?
Sunday, April 8, 2012 at 9:43pm by bobpursley

PHYSICS-electricity & magnetism
-e and +e respectively
Friday, February 24, 2012 at 1:34pm by Brandon

Physics- magnetism
F=I length X B where X is the cross product.
Monday, March 7, 2011 at 10:28am by bobpursley

magnetism
well, A is not the answer, I was thinking about C, but I'm not sure
Wednesday, December 4, 2013 at 2:44pm by fima

magnetism
by the way, have you done the 4th questions?
Wednesday, December 4, 2013 at 2:44pm by fima

electricty and magnetism
did anyone do the question on the graph? can you help me please/ thanks
Tuesday, December 17, 2013 at 3:54pm by anton

magnetism
Although this is not my area of expertise, I would agree.
Monday, April 23, 2012 at 7:49pm by PsyDAG

Magnetism 8.02x
can u also give the answer for part c)??
Friday, June 14, 2013 at 2:58pm by Roxanne

magnetism and electricity
Desribe the configuration of the bent wire
Monday, December 2, 2013 at 12:36am by Elena

science
How is magnetism used to support the theory of seafloor spreading?
Monday, March 23, 2009 at 5:56pm by sara

physics
I agree with the hint! What is the question here? Here is an MIT solution.. http://ocw.mit.edu/courses/physics/8-02-electricity-and-magnetism-spring-2002/assignments/pss5.pdf see prob 5.3
Monday, April 7, 2014 at 5:01pm by bobpursley

Chem
Think about magnetism, malleability, conductor of heat and electricity.
Thursday, April 2, 2009 at 9:17pm by bobpursley

Earth science
the only choices are conductive convection magnetism radiation
Saturday, January 12, 2013 at 10:21pm by ?

Earth science
the only choices are conductive convection magnetism radiation
Saturday, January 12, 2013 at 10:21pm by ?

science Ellie
Ellie, since this is not my area of expertise, I searched Google under the key words "magnetic circuit unit" to get this source: http://en.wikipedia.org/wiki/Magnetism In the future, you can find the information you desire more quickly, if you use appropriate key words to do ...
Sunday, March 29, 2009 at 11:44pm by PsyDAG

science
how is the earth's magnetism useful It provides a navigation mark for hikers and sailors.
Tuesday, December 12, 2006 at 7:00pm by kizzy

Ivy Tech
The source of magnetism is A)polarization B)magnetic monopoles C)electrons D)protons
Friday, March 26, 2010 at 11:51pm by Kim Love

currerent amd magnetism
I(max) = B昪時/2 = =0.01𠖥0⁸0.0005/2 = 750 A
Thursday, November 28, 2013 at 5:51am by Elena

Science: Discovering Magnetism
How is the strength of two magnetic poles related to the force between them?
Monday, January 27, 2014 at 11:58pm by Losa

Physics - Magnetism
The direction of magnetic lines of force change if an iron piece is placed in its field. Why?
Monday, July 29, 2013 at 5:21pm by silent_klr

physics-magnetism
The direction of magnetic lines of force change if an iron piece is placed in its field. Why?
Wednesday, July 31, 2013 at 11:23pm by silent_klr

earth
#15 The primary cause of crustal movement is_________ a.) conduction b.) convection c.) magnetism d.) radiation please help have no idea
Sunday, January 13, 2013 at 3:41pm by ?

Science, one more time...
Insulation keep a house warm because it is a poor conductor of A. Heat B. Mass C. Sound D. Magnetism what do you think, and why?
Monday, April 16, 2007 at 8:38pm by Missy

PHYSICS-electricity & magnetism
Ions is not specific enough? what is the charge on the ions?
Friday, February 24, 2012 at 1:34pm by bobpursley

magnetism
r=d/2 =0.5 mm =0.0005 m I(max) = B(cr) c r /2 = 0.01𠖥0⁸0.0005 /2 = 750 A
Sunday, December 1, 2013 at 10:22am by Elena

Physics - Magnetism
The iron has higher permability, that is, it is easy for the iron to carry the magnetic lines of force.
Monday, July 29, 2013 at 5:21pm by bobpursley

Psysics (Magnetism)
A current-carrying wire is placed in a uniform magnetic field, but there is no magnetic force on it. How is this possible?
Tuesday, April 24, 2012 at 7:21pm by Brooke

magnetism
A straight copper wire that is 1 millimeter in diameter carries a current of 20 milliamps. What the magnitude of the largest magnetic field created by this wire in Tesla?
Wednesday, December 18, 2013 at 6:56am by Hans

magnetism and electricity
An infinitely long wire carrying a current of 2 A is bent at a right angle as shown in the Figure. What is the magnetic field magnitude in Tesla a point P, 10 cm from the corner? 6.06810^6 T is wrong
Monday, December 2, 2013 at 12:36am by Sue

Physics 103
So I have a question about magnetism. A charged particle moves through a region of space and experiences no magnetic force. Does that mean that the magnetic field is zero?
Tuesday, March 2, 2010 at 11:13pm by Kate

magnetism!!
A straight copper wire that is 1 milimeter in diameter carries a current of 20 miliamps. Whas the magnitude of the largest magnetic field created by this wire in Tesla? pls help :(
Wednesday, December 18, 2013 at 9:23pm by akameno

Science
There are only three types of forces in nature: nuclear forces. strong, weak electromagnetic forces. magnetism, electric charge gravity, with or without spacetime.
Monday, January 4, 2010 at 9:36pm by bobpursley

science
im 11 years old do you know a science fair project i can do for magnetism. or a website. im in six grade
Thursday, October 30, 2008 at 1:43pm by Christian

electricity and magnetism
p=IA= Iπr² τ=pBsinφ (sinφ=1) => τ=pB
Friday, November 22, 2013 at 4:30am by Elena

Science
I need help in Science Project. The topic is called "How does the size affect the force of magnetism". I didn't see any procedure in how to do this particular topic can you help me?
Sunday, April 8, 2012 at 9:43pm by Richard

physics - magnetism
A simple generator has a 780-loop square coil 21.0 cm on a side. How fast must it turn in a 0.650 T field to produce a 150 V peak output? I got 6.71 rev/s but that is wrong
Thursday, May 13, 2010 at 8:21pm by Anonymous

magnetism
How can a permanent magnet be demagnetized? cut the magnet in half heat the magnet up (my choice) strike the magnet with a heavy blow both the second and third choices above
Monday, April 23, 2012 at 7:35pm by lilman

PHYSICS
Give at least one example of an application of each branch: motion properties of materials sound light electricity magnetism properties of atoms nuclear physics Dont understand this.
Wednesday, September 7, 2011 at 8:33pm by Anonymous

Chemistry #2
I'm not positive what the question is asking either, but here goes. Choose sugar. State: sugar is a solid. color: white solubility in water: yes. ductility: not ductile malleability: not malleable. magnetism: not magnetic but you only require four of them.
Thursday, May 7, 2009 at 11:18am by DrBob222

Magnetism
I need to calculate the magnetic field strength at 30 cm distance of a coil with a diameter of 17 cm. Directly at the coil surface I measure 100 Gauss. Please advise.
Thursday, February 10, 2011 at 6:01am by Ben

electricity magnetism physics
A proton is release from rest at the origin in a uniform electric field in the positive x direction with magnitude 850N/C. What is the change in electric potential energy when the proton travels to x = 2.50m
Monday, October 28, 2013 at 8:17am by wi

science
i need helping answering this homework question on magnetism: which of the following will induce a current in a nearby circuit? A. any magnetic field B. an electromagnet with varying current C. an unchanging electromagnet D. a powerful, unmoving horseshoe magnet
Tuesday, June 2, 2009 at 5:01pm by leslie

Materials
Give at least one example of an application of each branch: Motion -cellphone Properties of Materials Sound -Radios Light -Candle Electricity -Calculator Magnetism -VCR's Properties of atoms -Computers Nuclear physics -?
Thursday, September 15, 2011 at 8:35pm by Anonymous

SCIENCE GRADE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I think this modification will help it. But I also think starting sentences with capital letters aids in reading. The magnet attracts the iron nail and induces temporary magnetism in it which allows it to attract other iron objects.
Tuesday, January 17, 2012 at 5:23pm by DrBob222

ELECTRICITY AND MAGNETISM
a dust particle with mass =5.0*10-9 kg and charge q =2.0nC starts from rest at point a and moves in a straight line from a to the point b ! what is its speed V at point b? please some on SOLVE it and send me ON my emial after got solved pleaseee ?
Saturday, October 29, 2011 at 2:32pm by sufyan khalil

physics, magnetism
A long thin copper wire has a mass of 100 grams / meter. If it is arranged near the surface of the earth pointing north in a 0.5 Tesla magnetic field pointing west, what current (in amps) is needed to levitate the rod (against gravity)?
Tuesday, November 26, 2013 at 6:45am by utuchegal

Science
Physical changes are the most common, so change of state, colour change, pH, solubility change, magnetism, refractive index, melting point, boiling point, optical rotation, and I am sure you can think of some more.
Friday, July 29, 2011 at 7:23am by Dr Russ

PHYSICS-electricity & magnetism
An electric field exits inside a fluorescent tube of diameter 3.00cm. In one second, 2.00x10^18 electrons and 0.50x10^18 positive ions pass through a certain cross section. What is the current in the tube?
Friday, February 24, 2012 at 1:34pm by Brandon

currerent amd magnetism
An Aluminium wire of 1mm diammeter below the critical temperature of 1.2 K. iTS CRITICAL MAGNETIC FIELD IS 0.01t, What is the maximum current in Amperes that you can send down the wire for it to remain superconducting? what formular can I use to solve this? someone please help.
Thursday, November 28, 2013 at 5:51am by Tom

Science
Which mineral property test is the best way to tell the difference between each type of mineral? Why? Mineral Properties are: -Luster -Color -Magnetism -Hardness -Streak -Cleavage There are other mineral properties like Odor and Taste.
Tuesday, December 3, 2013 at 4:52pm by Tiffany

Physics
There is no such thing as a magnetic charge. Magnetism works in closed lines from N to S and back for example. You can have a + or a - electric charge sitting alone. Both types of electromagnetic phenomena have vector fields and the forces they exert are a function of where in...
Monday, May 19, 2008 at 10:18pm by Damon

electrical trade theory
what is the function of the field coils of a DC motor? They provide a magnetic field that is opposite that of the rotating axle. Here is an interactive site that may help although this site has paermanent magnets for the field magnetism. (Broken Link Removed) THANK U DrBob222
Friday, September 29, 2006 at 1:25pm by michelle

magnetism
magnetic moment= current(I)* area(A) = 20*10^-3* pi*2^2 = 0.2513 torque= magnetic moment*magnetic field(B) = 0.2513*1.2 =0.301
Wednesday, November 20, 2013 at 1:05am by roshni

Physics- magnetism
The four wires in the figure are tilted at 20degrees with respect to the field direction. Each carries a 4.5 current and is 0.35m long. What is the magnitude and direction of the force on each wire? (the answer is in terms of B-magnetic field) Image: h t t p: //p osti mage. or...
Monday, March 7, 2011 at 10:28am by Bob

physical science
Since this is not my area of expertise, I searched Google under the key words "visible light frequency" to get these possible sources: http://www.windows.ucar.edu/tour/link=/physical_science/magnetism/em_visible_light.html&portal=vocals http://en.wikipedia.org/wiki/...
Friday, December 11, 2009 at 7:28pm by PsyDAG

electricity magnetism physics
ΔKE=W(electric field) =eΔφ=e旹晉= =1.610⁻¹⁹8502.5 =3.410⁻¹⁶ J.
Monday, October 28, 2013 at 8:17am by Elena

Physics: Electricity and Magnetism
Four charges on a rectangle that is 6 cm by 3 cm. All but one of the corners has a positive charge. The magnitudes of the charges are all 8.40e-12 C. What is the net electric field at the center of the rectangle?
Friday, April 10, 2009 at 7:16pm by Erica

magnetism
A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque on the loop in N-m?
Wednesday, November 20, 2013 at 1:05am by James

magnetism
A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque on the loop in N-m?
Wednesday, November 20, 2013 at 1:05am by James

physics
The glass rod gets a positive charge. See 49-physics121-lecture02-Physics-121-Electricity-Magnetism-Lecture-2Electric-Charge-lect-Education-ppt-powerpoint/ Whatever else happens depends upon the the experimental setup and precedure, whih are not adequately explained in your ...
Wednesday, March 25, 2009 at 12:42am by drwls

electricity and magnetism
A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque on the loop in N-m?
Friday, November 22, 2013 at 4:30am by Jason

Science
i have to do this packet about magnetism, but we havent even learned anything about it yet. I have got some of the answers but i cant figure out the rest. What do you need to make an electromagnet? What is an advantage of using an electromagnet? Name 3 places where you would ...
Monday, April 7, 2008 at 7:48pm by Emily

Magnetism
This is a circular coil and indeed the open area is 227 cm No not perpendicular but parallel from the coil (measured 30 cm away from above the coil). My Gauss meter is not sensitive enough to pick up the signal at this distance. Can you somewhat elaborate more on the various ...
Thursday, February 10, 2011 at 6:01am by Ben

Magnetism
A circular wire loop of mass M and radius R carries a current I. It hangs from a hinge that allows it to swing in the direction perpendicular to the plane of the loop. A uniform magnetic field B exists everywhere in space pointing upwards. What angle θ does the plane of ...
Wednesday, December 18, 2013 at 4:59pm by Colin

Physic please check
I agree with your formula and numbers, but you are carrying too many significant figures, especially with the cosine. There should only be two significant figures. I have preferred to avoid Electricity and Magnetism questions because I don't remember the subject very well, and...
Monday, November 5, 2007 at 11:04pm by drwls

magnetism
Two long, parallel wires carry current in the x-y plane. One wire carries 30 A to the left along the x-axis. The other carries 50 A to the right along a parallel line at y = 0.28 m. At what y-axis position in meters is the magnetic field equal to zero?
Friday, November 29, 2013 at 7:09am by anton URGENT Please

Physics magnetism
The inductor in the circuit has a resistance of 100 ohms connected to a long solenoid with a loop density of 100 turns per centimeter and 59 H inductance connected to a 12 V battery. When the switch has been closed for a long time, what is the magnetic field magnitude inside ...
Saturday, December 7, 2013 at 5:45am by James

Physics - The Branches of Physics
Give at least one example of an application of each branch: Motion -cellphone Properties of Materials Sound -Radios Light -Candle Electricity -Calculator Magnetism -VCR's Properties of atoms -Computers Nuclear physics -? Could you check to see if Ive done this right? And I ...
Friday, September 9, 2011 at 8:49pm by Anonymous

chemistry
The first force you mentioned is usually called the "strong force". It takes place between "baryons" (such as protons and neutrons) whether they are in a nucleus or not. The second force is electrostatic, as you mentioned. It is part of the electromagnetic force. It is better ...
Thursday, January 22, 2009 at 2:52pm by drwls

Physics
In a physics study group, a friend says in a profound tone that light is the only thing we can see. After a few laughs, your friend goes on to say that light is produced by the connection between electricity and magnetism. Is your friend correct? My responds is that my friend ...
Saturday, August 24, 2013 at 4:54pm by Edward

Electr. and Magnetism
1. (b) is closest. You need to use Coulomb's law and integrate the effect of charge from x = 0 to 2, and include the factor epsilono 2. When you use Coulomb's Law to add the vector electrostatic forces, the resultant will be parallel to the opposite side of the triangle. F = 2...
Monday, January 31, 2011 at 5:00am by drwls

Science
Describe the method you would use to seperate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c salt and pepper d)sand and pebbles e)sugar and water 2. List several different filters in...
Thursday, December 16, 2010 at 7:04pm by Saquta

Physics
In a physics study group, a friend says in a profound tone that light is the only thing we can see. After a few laughs, your friend goes on to say that light is produced by the connection between electricity and magnetism. Is your friend correct? My responds is that my friend ...
Saturday, August 24, 2013 at 4:54pm by Trinitee

Physics: Electricity and Magnetism
The electric field contribution of the two opposite positive charges cancel out. The two charges on opposite sides that are of opposite sign will double the field due to a single charge. The center of the rectangle is at a distance R from corners that is given by the equation ...
Friday, April 10, 2009 at 7:16pm by drwls

physics electricity and magnetism
We are told that the magnitude of the negative charge on the electron is exactly equal to the magnitude of the postive charge on the proton. But is it? Suppose that these magnitudes differ from each other by 0.000040 %. Each copper coin contains 3 X 1022 copper atoms. (a)With ...
Thursday, July 1, 2010 at 11:45am by naveel

Astronomy
The speed of light is the same for all observers, and the laws of physics are the same for all observers in uniform motion. These two statements are fundamental postulates of A) general relativity B) Newtons laws of motion C) special relativity D) the laws of electricity and ...
Sunday, March 28, 2010 at 3:26pm by Anonymous

magnetism
Many metals become superconductors (zero resistance, zero loss, zero heating) at low temperatures. If they are warmed above the critical tempareature, the superconductivity is lost. Also, if the metal experiences a magnetic field above a critical value, the superconductivity ...
Monday, December 2, 2013 at 1:29pm by Sue

science
There are effects of magnetism and charged particles in the ionosphere, but that is well out of the atmosphere. http://en.wikipedia.org/wiki/Aurora_(astronomy)
Tuesday, September 30, 2008 at 8:56pm by bobpursley

5th Grade Science
The force of attraction between the Earth and an object is called? A. Magnetism B. Mass C. Energy D. Gravity http://en.wikipedia.org/wiki/Gravity hey ken. someone told me it was gravity So you think it is gravity
Wednesday, April 18, 2007 at 5:14pm by Missy

Electricity and Magnetism
This was actually a test question: Additional Information: This question is based on the Hall effect in a wire. Question: I want you to build a magnetic feild sensor. You have all the properties of the materials and the dimentions of the sensor. a) derive a formula for a ...
Sunday, November 27, 2011 at 10:24pm by Simon

Science
I have been waiting for 30 minutes and noone has answered this question. Please help me! Describe the method you would use to seperate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c ...
Thursday, December 16, 2010 at 7:22pm by Saquta

physics electricity & magnetism
Charge Q=4 micro-coulombs is distributed uniformly over the volume of an insulating sphere of radius R=.05 meters. What is the potential difference between the center of the sphere and the surface of the sphere? How do I approach this problem? I tried integrating dV=-Edr from ...
Saturday, December 3, 2011 at 4:02pm by cooper

current and magnetism
A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations? I tried the ...
Sunday, November 24, 2013 at 1:27am by James

magnetism
μ₀I₁/2πy= μ₀I₂/2π(0.28-y) I₁(0.28-y)= I₂y 30(0.28-y)=50y 80y=8.4 y=8.4/80=0.105 m
Friday, November 29, 2013 at 7:09am by Elena

Magnets-Physics
I have a few questions that I am not too sure of. why is it inadvisable to make a horseshoe magnet from a flexible material? -is it because it would have enough magnetism Do the poles of a horseshoe magnet attact each other? If you bend the magnet so that the poles get closer ...
Tuesday, November 6, 2007 at 11:41pm by Soly

physics - magnetism
In angular velocity (rad/s) units, call the coil rotation rate w. The peak induced voltage is Vmax = N*B*A*w = 150 V where N is the number of turns (780), A = (0.21)^2 = 0.0441 m^2, and B = 0.650 T Thus w = 6.71 rad/s Your numerical answer is correct but the units are wrong. ...
Thursday, May 13, 2010 at 8:21pm by drwls

Science
My answers are at the bottom. Describe the method you would use to seperate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c salt and pepper d)sand and pebbles e)sugar and water 2. ...
Thursday, December 16, 2010 at 7:44pm by Saquta

Physics (Electricity & Magnetism))
Two positive point charges are placed on the x-axis. One, of magnitude 4Q, is placed at the origin. The other, of magnitude Q is placed at x=3 m. Neither charge is able to move. Where on the x-axis in meters can I place a third positive point charge such that the magnitude of ...
Wednesday, March 27, 2013 at 7:53am by Gurudev

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