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April 20, 2014

Search: Physics (Electricity & Magnetism))

Number of results: 109,749

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

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

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

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

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

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

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

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

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

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 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

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

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

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

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

electricity magnetism physics
ΔKE=W(electric field) =eΔφ=eEx= =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 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

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

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

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

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

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

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

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
Name a device that produces DC electricity. What does 60Hz, 120V electricity mean?
Wednesday, October 24, 2007 at 9:57pm by Will

Physics
What does 60Hz, 120V electricity mean? Name a device that produces DC electricity. I didnt understand
Friday, October 26, 2007 at 2:51pm by Will

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

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

math
In a normal month you use 1200 kWh of electricity. Your electricity provider has decided to increase the rate it charges for electricity by $0.05 per kWh. If you continue to use electricity at the same rate, how much more will it cost for one year? explain plz!!!
Tuesday, October 29, 2013 at 10:03pm by anonymous0.1

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

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 ...
Sunday, April 28, 2013 at 5:45pm by JD

Physics
Hi. This question is from my own point of view based on electricity. Is it possible in theory to have electricity passed through wireless rather than using wires????
Monday, June 17, 2013 at 12:29am by anonymous

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

physics
Your electricity usage for a one month period is 500 kilowatt-hours. Assuming one month is equal to 30 days and that the electricity usage is uniform across the whole month, what would be the velocity of a 1 kg mass if it was given the kinetic energy equivalent to one day's ...
Thursday, November 3, 2011 at 10:49am by pakilina

physics
Water contains some ions that conduct electricity. Saltwater is a good conductor. Air does not conduct electricity unless the electric field is high enough to ionize the air. In that case, free electrons are the main conductors. Earth contains various salts that conduct ...
Friday, February 3, 2012 at 2:48am 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

PHysics
describe briefly how a generator works. Well, I'm in the electricity unit of my course, so would this mean I have to describe how electricity's generated?
Sunday, December 28, 2008 at 4:28pm by Jane

physics
Radiate? Woods are insulators, and do not conduct electricity, so if you place an electrical charge on some wood, it does not move. I frankly am uncertain what you mean by radiate electricity.
Friday, January 9, 2009 at 1:54pm by bobpursley

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

physics
Can water,air and earth conduct electricity? If yes, then explain how they conduct electricity.
Friday, February 3, 2012 at 2:48am by mikylexes

physics
The lunar landing rocket "LEMDE" was use for an unintended purpode: to change the orbit so that the spacecraft circled the moon and returned. It was then used to enter the Earth's atmosphere at a safe angle and speed for reentry. Newton's laws of motion were used to compute ...
Thursday, December 30, 2010 at 10:05pm by drwls

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

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 ...
Sunday, May 1, 2011 at 6:33pm by Ana

to ms.sue
These sites may help you understand magnets and electricity. http://www.historyforkids.org/scienceforkids/physics/electricity/magnet.htm http://www.physics4kids.com/files/elec_intro.html http://www.firstschoolyears.com/science/electricity/electricity.html
Monday, April 16, 2012 at 5:42pm by Ms. Sue

chemistry 110
A non-electrolytes conducts no electricity. A strong electrolyte conducts electricity very well. A weak electrolyte conducts electricity between the other two.
Wednesday, October 19, 2011 at 11:30pm by DrBob222

essay: inventions
I have to write an essay for my english class. The "subject" is inventions. I came up with the phone, the car, electricity, and peanut butter. Peanut butter was more of a joke. I think that I should do electricity. If I did electricity, I could put different things that we ...
Sunday, January 22, 2012 at 10:09pm by 12-year-old-poet

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

chemistry
22. Choose the best description for a solid held together by London forces. A. This substance melts at -30 C to give a liquid that does not conduct electricity. B. This substance melts at 650 C and both the solid and liquid phases conduct electricity. C. This substance melts...
Sunday, February 13, 2011 at 3:32pm by Kathy R

statistics
The quarterly seasonal indexes for a firms electricity consumption are 115, 92, 81, and 112 for quarters I-IV. It has been forecast that electricity consumption will be 850,000 kilowatt-hours during 2008. Forecast electricity consumption for each quarter of 2008
Sunday, August 16, 2009 at 3:12pm by Yadira M

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

us history
I vote for electricity. Without electricity your other devices are not possible.
Wednesday, October 24, 2012 at 3:24pm by Ms. Sue

Physics
Assuming 100% of your energy can be converted to electrical power, and electricity costs $0.10 for 1 kilowatt-hour, how high should you climb to make one penny's worth of electricity? Show all work & units. I have 288.8 watts, and that's as far as I have been able to reach.
Tuesday, October 5, 2010 at 7:00pm by Amber

math
Consumers pay for electricity by the kilowatt-hour (the amount of electricity used by a 1,000-watt appliance in one hour). If electricity costs 10cents per kilowatt-hour, what is the cost of running a 100-watt lamp for 1. 1 hour? 2. 24 hours? 3. 1 year?
Tuesday, December 7, 2010 at 12:02pm by Mike

science
Potassium hydroxide conducts electricity. Sugar when dissolved does not form ions, and cannot conduct electricity.
Wednesday, October 24, 2007 at 8:16pm by bobpursley

Science
Why do we have an electricity crisis? What will happen if we don't save electricity?
Wednesday, April 15, 2009 at 3:20pm by Rochelle

Science
I need help with static electricity and generating current electricity.
Tuesday, November 13, 2012 at 7:46pm by Aamira

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

Static Electricity. 11th Grade Pre-AP Physics
Hi everyone. I also broke these up into separate questions because I figured it would be easier to answer that way in case your specialty is one of the questions and not static electricity as a whole. Thanks to everyone who helps!
Friday, February 25, 2011 at 2:08pm by Angela

chem
Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity for a house. Use the balanced redox reactions and the standard cell potential to predict the volume of hydrogen gas (at STP) required each month to generate the electricity needed for a typical house...
Monday, August 9, 2010 at 11:24pm by Anonymous

Science
IT makes electricity. Electricity then can do anything.
Monday, January 6, 2014 at 9:00pm by bobpursley

Electricity
Try this site and don't forget to check the links at the bottom: http://en.wikipedia.org/wiki/Electricity Sra
Wednesday, January 28, 2009 at 1:13pm by SraJMcGin

Chemistry
Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity for a house. Use the balanced redox reactions and the standard cell potential to predict the volume of hydrogen gas (at STP) required each month to generate the electricity needed for a typical house...
Tuesday, April 13, 2010 at 6:33pm by Katelynn

chemistry
Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e- , how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month, ...
Sunday, July 11, 2010 at 9:48pm by seth

Chemistry
Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e-, how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month, ...
Saturday, July 30, 2011 at 5:37pm by norma

Chemistry
Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e- how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month, ...
Friday, April 13, 2012 at 4:27pm by Anonymous

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

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

Science
Solid table salt does not conduct electricity. How does dissolving salt in water allow electricity to flow?
Tuesday, December 1, 2009 at 7:10pm by Easton

ap
I think the answer you are looking for is S. You know Hg, Cu, and K conduct electricity for they are metals. Molten NaCl consists of a sea of ions floating around so that conducts electricity very well. That leaves S by elemination.
Friday, October 5, 2012 at 6:53pm by DrBob222

science
Why are plasmas able to conduct electricity? Plasmas are electricity: all ions, free to move.
Tuesday, January 23, 2007 at 8:03pm by Ryan

Science 2 questions
how and where is electricity generated in British Columbia, Canada? describe how most of the electricity is generated in England or another country. But it must be different than what occurs in B.C. Please help, thanks:)
Tuesday, April 9, 2013 at 7:37pm by Olly

physics
http://www.smgaels.org/physics/home/animations3/electricity/balloon_static_e.html
Tuesday, April 7, 2009 at 5:33pm by bobpursley

science
http://science.howstuffworks.com/magnetism-info2.htm
Sunday, April 22, 2012 at 8:45pm by Ms. 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
It'swrong!!
Friday, November 29, 2013 at 7:09am by manu

Science
windmill in the back yard for electricity and water well pump solar panels for hot water and electricity and heat stationary bikes hooked up to alternators to run battery chargers for your computers and some lights and maybe TV stream in back yard diverted to run over water ...
Monday, March 3, 2014 at 6:36pm by Damon

Physics
In a hydroelectric dam, water falls 26.0 m and then spins a turbine to generate electricity. What is ∆U of 1.0 kg of water? Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the...
Monday, November 30, 2009 at 2:07pm by Zach

introductory technology
I will do a few.. 1b) input: electricity, output: heat 1e) input electricity, electrical waves, output: sound
Saturday, January 2, 2010 at 10:28am by bobpursley

Science
When people want to use water to create electricity they generally build a dam to hold the water back, creating a large lake behind the dam. Why is it necessary to hold the water back with a dam in order to produce electricity? A)It increases the amount of water available. B)...
Wednesday, April 4, 2012 at 7:23pm by Mia pleaseee helppp

physics
electricity you can eat
Friday, July 3, 2009 at 3:24pm by aishwarya sharma

economics
Yes, electricity is a variable cost. Since variable costs are expenses that change in proportion to the activity of a business, then the mill will pay more for electricity when it is producing more goods.
Monday, October 29, 2007 at 9:13pm by Ms. Sue

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

Physics
Please give me numerically answer of tata mcgrawhill book class 10 of physics electricity total unsolved
Thursday, August 4, 2011 at 9:48am by Abhishek kumar sahi

science
Go back to 1910. Most people did not have electricity in their homes. And those who did often could use it a few hour a day. The only thing powered by electricity in homes were the lights. By 1960, almost every home had electricity that powered refrigerators, radios, TVs, ...
Sunday, February 21, 2010 at 12:02pm by Ms. Sue

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

science
Ionic solids do not conduct electricity (unless they are molten--of course they aren't solids then). Metals do conduct electricity in their solid form.
Saturday, December 12, 2009 at 6:12pm by DrBob222

sience
There is also no such word as "sience". The correct spelling is science. If you type "what is electricity" into Google, you will get links to a lot of websites that tell you, such as http://www.eia.doe.gov/kids/energyfacts/sources/electricity.html "nuckears" may be an earlier ...
Saturday, June 28, 2008 at 2:07pm by drwls

physics
why woods do not radiate electricity?
Friday, January 9, 2009 at 1:54pm by Alveera

Physics -Electricity
Life saver, thanks!
Monday, February 6, 2012 at 11:37am by Anonymous

physics
5 usage for electricity.(in points)
Wednesday, October 10, 2012 at 10:03am by sumi

Science
List ways simple plants affect your life each day. (HINT: Where do electricity and heat for homes come from?) food, heat and electricity(from fossils and coal and oil), cars (gasoline from oil), etc.
Wednesday, February 7, 2007 at 8:00pm by Jessica

physics (electricity)
what is charging(electrifying) by induction?
Thursday, June 12, 2008 at 9:33pm by Naomi

Physics/electricity
The answer is 5.075 ohms
Sunday, October 6, 2013 at 11:39pm by Pat

Physics
An Electricity account shows that a household has used 1400 units of electrical energy during a three month period. Calculate : a)the number of joules of energy used in this time. b)the average number of joulesof energy used perday . c)the average power consumption in watts. d...
Wednesday, June 1, 2011 at 6:28pm by Nelly

Physics
An Electricity account shows that a household has used 1400 units of electrical energy during a three month period. Calculate : a)the number of joules of energy used in this time. b)the average number of joulesof energy used perday . c)the average power consumption in watts. d...
Thursday, June 2, 2011 at 5:29pm by Nelly

English
Hello...How are you doing?.... It's about future Enery saving shoes. When we walk wearing Energy shoes, we can make the walking energy into electricity. With the electricity we can listen to MP3 files....The sentences are related to the question which I uploaded before. Thank ...
Sunday, May 19, 2013 at 10:17pm by rfvv

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