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December 21, 2014

Search: magnetism

Number of results: 98

physics
explain the close relationship between magnetism and electricity? and How can electricity produce magnetism, and magnetism produce electricity.
July 3, 2009 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...
October 20, 2013 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.
April 7, 2008 by Jenna

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!!!!!!!!!!!
December 12, 2006 by Lance

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...
April 17, 2007 by Help

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 ...
March 26, 2012 by Celest

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

science
How is magnetism used to support the theory of seafloor spreading?
March 23, 2009 by sara

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

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

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

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

physics-magnetism
The direction of magnetic lines of force change if an iron piece is placed in its field. Why?
July 31, 2013 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
January 13, 2013 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?
April 16, 2007 by Missy

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

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?
April 24, 2012 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?
December 18, 2013 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
December 2, 2013 by Sue

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.
February 10, 2011 by Ben

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
May 13, 2010 by Anonymous

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 :(
December 18, 2013 by akameno

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?
March 2, 2010 by Kate

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?
April 8, 2012 by Richard

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
April 23, 2012 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.
September 7, 2011 by Anonymous

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
October 28, 2013 by wi

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?
February 24, 2012 by Brandon

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
June 2, 2009 by leslie

physics
Some of the branches of physics that you will study in this course investigate motion, the properties of materials, sound, light, electricity and magnetism, properties of atoms, and nuclear reactions. Give at least one example of an application of each branch.
August 25, 2014 by Jack

physics
Some of the branches of physics that you will study in this course investigate motion, the properties of materials, sound, light, electricity and magnetism, properties of atoms, and nuclear reactions. Give at least one example of an application of each branch.
August 25, 2014 by Jack

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 ?
October 29, 2011 by sufyan khalil

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 -?
September 15, 2011 by Anonymous

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?
April 10, 2009 by Erica

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)?
November 26, 2013 by utuchegal

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.
November 28, 2013 by Tom

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
September 29, 2006 by michelle

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.
December 3, 2013 by Tiffany

Physics Electricity and Magnetism
A microscopic droplet of ink in an ink-jet printer is deflected onto the paper by a force of 2.3410-4 N. If the field causing the deflection is 6.62 kN/C, what is the charge on the droplet? What equation do I use to solve and What does each value mean in the equation? thnks
August 29, 2014 by Greg

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...
March 7, 2011 by Bob

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?
November 20, 2013 by James

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?
November 22, 2013 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 ...
April 7, 2008 by Emily

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 ...
December 18, 2013 by Colin

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?
November 29, 2013 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 ...
December 7, 2013 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 ...
September 9, 2011 by Anonymous

Physics, Electricity and Magnetism, Sciences
Two small pith balls, each of mass m = 17.4 g, are suspended from the ceiling of the physics lab by 1.2 m long fine strings and are not moving. If the angle which each string makes with the vertical is = 17.9, and the charges on the two balls are equal, what is the magnitude ...
September 5, 2014 by Bryan

science
2) Which is not an example of matter? A. water B. air(i think it this one) C. gold D. sound 3) The amount of space an object occupies is called its ..... A. volume(i think it this one) B. mass C. electricity D. gravity 4) Atoms in a molecule are joined together by.. A. ...
December 12, 2014 by eduarda

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...
December 16, 2010 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 ...
August 24, 2013 by Trinitee

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 ...
July 1, 2010 by naveel

Urgent : Electricity and Magnetism
Two charged spheres are kept at a great distance from each other. Sphere A has charge +20q and sphere B has charge -14q. A neutral conducting sphere, sphere X, is then touched upon the sphere A, then sphere B, and X, repectively, after these q(a),q(b) and q(x) are the charges...
July 4, 2014 by Ahsanur

Physics Electricity and magnetism
A current with sinusoidal time-dependence, whose peak value is 3.55 A and frequency is 463 cycles per second, passes through a long straight wire. A rectangular 72.2 cm 32.5 cm loop of copper wire is located 80.2 cm from the wire and is coplanar with it. Calculate the ...
April 28, 2013 by JD

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 ...
March 28, 2010 by Anonymous

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 ...
December 3, 2011 by cooper

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
April 18, 2007 by Missy

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 ...
December 2, 2013 by Sue

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 ...
December 16, 2010 by Saquta

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 ...
November 27, 2011 by Simon

Electr. and Magnetism
1) A charge of 80nC is uniformly distributed along the x-axis from x= 0 to x= 2.0m. Determine the magnitude of the electric field at a point on the x-axis with x=8.0m. a] 30 N/C b] 15 N/C c] 48 N/C d] 90 N/C e] 60 N/C 2) 3 point charges, 2 positive and one negative, each ...
January 31, 2011 by Allan

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 ...
November 24, 2013 by James

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 ...
November 6, 2007 by Soly

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. ...
December 16, 2010 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 ...
March 27, 2013 by Gurudev

magnetism
Three conducting loops are situated side-by-side in the plane of the page. A clockwise current flows in the center loop B, and its magnitude is decreasing in time. The induced currents in loops A and C: A) flow in opposite directions,A clockwise, B counterclockwise) b)both ...
December 4, 2013 by ANTON

magnetism
infinitely long wire carries a current I100A. Below the wire a rod of length L 10cm is forced to move at a constant speed v=5m/s long horizontal conducting rails. The rod and rails form a conducting loop. The rod has resistance of R 0.4ohms. The rails have neglibible ...
December 17, 2013 by james

Science - Physical
Earth's magnetic field induces some degree of magnetism in most of the iron objects around you. With a compass you can see that cans of food on you pantry shelf have north and south poles. When you pass the compass from their bottoms to their tops, you can easily identify ...
March 13, 2011 by Jessica

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 ...
December 1, 2013 by manu

physics
Choose the correct description for each "Law" of Electricity & Magnetism. The choices are faradays law lenz law ampere law are my choices correct Gives the amount of current resulting from a changing magnetic field.AMPERE LAW Gives the strength of the magnetic field resulting ...
May 1, 2011 by Ana

magnetism
In earlier learning sequences we described how a static magnetic field cannot change the speed (and therefore kinetic energy) of a free charged particle. A changing magnetic field can, and this is one way particle beams are accelerated. Consider free protons following a ...
December 3, 2013 by manu

magnetism
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
November 20, 2013 by Anton (Elena Pl: check)

magnetism help
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
November 22, 2013 by Carl

magnetism
very large loop of metal wire with radius 1 meter is driven with a linearly increasing current at a rate of 200 amps/second. A very small metal wire loop with radius 5 centimeter is positioned a small distance away with its center on the same axis (the loops are coaxial). The...
December 3, 2013 by manu

Physics
Which of the following statements for magnetism are true? (Give ALL correct answers) A) B does work on a charge only when the charge has a velocity component perpendicular to B. B) B acts only on charges at rest. C) B does work on a charge only when the charge has a velocity ...
October 6, 2007 by Richie

physics opinion
A common pickup for an electric guitar consists of a coil of wire around a permanent magnet. The permanent magnet induces magnetism in the nearby guitar string. When the string is plucked, it oscillates above the coil, thereby changing the magnetic field that passes through ...
May 16, 2012 by Alice

magnetism
A charged particle with charge q is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendiculuar to the same magnetic field. The time to complete one full circular revolution for the first particle is...
December 18, 2013 by colin

magnetism
A charged particle with charge q is moving with speed v in a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendiculuar to the same magnetic field. The time to complete one full circular revolution for the first particle T1. The time ...
December 16, 2013 by jami

magnetism
Moving a magnet inside a coil of wire will induce a voltage in the coil. How can the voltage in coil be increased? move the magnet inside the coil of wire more slowly hold the magnet stationary move the coil of wire slowly and keep the magnet stationary move the magnet inside ...
April 23, 2012 by lilman

SCIENCE GRADE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
If you had a piece of magnet and you stuck it to an iron nail, and you stuck it to a small washer. How would the washer stick to the iron nail.Please check to see if I'm write! The piece of magnet gets attracted to iron objects the iron nail.the iron nail sticks to the magnet....
January 17, 2012 by Analise

electronics technician
19. In a solenoid, where is the magnetic field strongest? A. Outside the coil C. At the north pole B. Inside the coil D. At the south pole 20. What is a typical coil voltage for a low-voltage relay circuit? A. 2 VDC C. 12 VDC B. 5 VDC D. 120 VDC 21. Electromagnetic stepping ...
June 18, 2013 by mompati

Science (URGENT#2)
Select any four of the physical properites listed in Table 1.1 on page 22 and use them to describe: gold, sugar, water. I don't quite understand what this question is asking. Here is the table of physical properties as mentioned. State - solid, liquid, gas Colour - colour ...
May 7, 2009 by John

Chemistry #2
Select any four of the physical properites listed in Table 1.1 on page 22 and use them to describe: gold, sugar, water. I don't quite understand what this question is asking. Maybe you could give an example? Here is the table of physical properties as mentioned. State - solid...
May 7, 2009 by John

Adv. Chem
I need some help with a Chemistry crossword. The subject is transition metals and we weren't told what chapter this was in the book. Down: 30. Cinder-like particles of pellets of concentrated ore Across: 5. Term referring to substances that are attracted into a magnetic field ...
October 25, 2010 by Kenshiro

Science
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite A? 2. All the processes that form mountain ranges are known as A. arch vibrations. B. compressive forces. C. orogeny. D. island arcing. C? 3. _______ describes...
February 1, 2014 by Beatrice

SCIENCE
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite A? 2. All the processes that form mountain ranges are known as A. arch vibrations. B. compressive forces. C. orogeny. D. island arcing. C? 3. _______ describes...
February 1, 2014 by Beatrice

physics
1. What did Newton conclude about the force that pulls apples to the ground and the force that holds the moon in orbit? 2. What does the very small value of the gravitational constant G (in standard units) tell us about the strength of gravitational forces? 3. We can think of ...
July 13, 2010 by confused

Physics (electricity and Magnetism)
A long straight and thin wire has a charge Q per unit length. It is also carrying a current I. A point charge is moving with a velocity v parallel to the conductor, at a distance d from it. Find the velocity v, supposing a correct direction for the current and the current ...
June 1, 2014 by John

Earth Science
Hello! I try to do my homework to the best of my ability. I want to make sure that my answers are correct. My answers will be (*). Please help me if you can.... 1. _______ was the first person to propose the idea of moving continents as a scientific hypothesis. A. Antonio ...
June 5, 2014 by TazKiyah

physics
Identify the area of physics that is most relevant to each of the following situations. Explain your reasoning. a. a high school football game b. food preperation for the prom c. playing in the school band d. lightning in a thunderstorm e. wearing a pair of sunglasses outside ...
August 21, 2006 by Anonymous

Reading
Words to choose from: Charisma, Contemporary, contend, conversely, extrovert, poignant, prevalent, proponent, quest and traumatic (1)___(Contemporary)young people may be able to list the many accomplishments of the Rev. Dr. Martin Luther King, JR. They may know that he was a ...
June 20, 2014 by Ronald

English Writing
i have an assignment that i have to email back my friend on identifying minerals. the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn the write up in the form of an ...
April 25, 2011 by needhelp

geology (very urgent)
i have an assignment that i have to email back my friend on identifying minerals. simple enough the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn the write up in the ...
April 25, 2011 by needhelp

geology (VERY X3 URGENT)
i have an assignment that i have to email back my friend on identifying minerals. simple enough the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn the write up in the ...
April 25, 2011 by needhelp

Science
plz any one these are some mcqs i am preparing for a test i m not sure with the answers of these mcqs this is not a homework not an online course exam so feel free to answer these thankx MCQS 01. Changes of equal magnitude are separated by some distance. If the changes are in ...
January 30, 2014 by Sania

Physics
plz any one these are some mcqs i am preparing for a test i m not sure with the answers of these mcqs this is not a homework not an online course exam so feel free to answer these thankx MCQS 01. Changes of equal magnitude are separated by some distance. If the changes are in ...
January 30, 2014 by Sania

science
plz any one these are some mcqs i am preparing for a test i m not sure with the answers of these mcqs this is not a homework not an online course exam so feel free to answer these thankx MCQS 01. Changes of equal magnitude are separated by some distance. If the changes are in ...
January 30, 2014 by Sania

science
plz any one these are some mcqs i am preparing for a test i m not sure with the answers of these mcqs this is not a homework not an online course exam so feel free to answer these thankx MCQS 01. Changes of equal magnitude are separated by some distance. If the changes are in ...
January 30, 2014 by Sania

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