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April 20, 2014

Search: Physics/ electricity

Number of results: 109,665

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

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
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

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
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

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

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

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

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

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

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
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

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

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
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

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

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

Chem
The best solar panels currently available are about 13% efficient in converting sunlight to electricity. A typical home will use about 40. kWh of electricity a day. Assuming 8 hours of useful sunlight per day, calculate the minimum solar panel surface area necessary to provide...
Friday, October 20, 2006 at 9:48pm by Joe

science
Light from an electric bulb is generated by electricity. You may infer that the solar was indirectly involved (solar panels to generate the electricity to light the bulb or that solar energy grew the plants and trees that eventually decayed, made coal, the coal was used to ...
Thursday, January 22, 2009 at 10:00pm by DrBob222

Chemistry
Regarding conductivity: 1. If a solution has a high conductivity, it indicates that there are a lot of __________________ in solution. [Answer: ions] 2. Pure acetic acid does not conduct electricity, nor does pure water, but a mixture of the two does conduct. This is explained...
Tuesday, November 24, 2009 at 4:35pm by .

maths
The monthly standing charge for a electrical company is 12.50 plus a cost of 0.16 per unit of electricity used. A customers monthly bill was 156.18. Determine how many units of electricity the customer used in that month.
Friday, May 3, 2013 at 2:55pm by james

Physics Electricity
And divide 0.679/2 to get r2, which is 0.339m
Friday, February 1, 2013 at 5:22am by Devron

Math
The amount of a monthly electric bill (B, measured in $) depends on the amount of electricity used that month (E, measured in kWh). A typical public utility charges $0.12 per kWh for the first 300 kWh used, $0.17 per kWh for the next 600 kWh used, and $0.29 per kWh for any ...
Tuesday, December 4, 2012 at 7:12pm by alice

Physics
1.) A lawnmower engine claims to provide 18 hp of power and 6.25 ft lb of torque. If this is true, what must be the rotational speed in RPM? 2.) The conversion of the shaft power of a wind turbine to electricity is the function of the generator. Assume it has an efficiency of ...
Monday, November 22, 2010 at 7:33pm by Carl

Physics
1.) A lawnmower engine claims to provide 18 hp of power and 6.25 ft lb of torque. If this is true, what must be the rotational speed in RPM? 2.) The conversion of the shaft power of a wind turbine to electricity is the function of the generator. Assume it has an efficiency of...
Monday, November 22, 2010 at 9:53pm by Pleseansermi

statistics
6. According to the records of Enersource, an electric company serving the Mississauga area, the mean electricity consumption for all households during winter is 1650 kilowatt-hours per month. Assume that the monthly electricity consumption during winter by all households in ...
Sunday, June 23, 2013 at 9:51pm by david

Physics
Why is using mirrors to generate electricity not a common practice?
Thursday, March 20, 2014 at 1:41pm by Cherie

Chem
1 Faraday of electricity = 96,485 coulombs and that amount of electricity will deposit 1 equivalent weight of a metal. The equivalent weight = molar mass/change in electrons (in this case delta n = 3). Coulombs = amperes x seconds
Sunday, March 30, 2008 at 6:20pm by DrBob222

SCIENCE
Most electricity is produced using fossil fuels. Some people think electricity should be produced using resources such as wind,water,and solar energy. Why might people have this opinion?
Thursday, November 3, 2011 at 5:22pm by Ally

chemistry
1) why do copper 2 sulfate chrystals not conduct electricty? 2)why is copper 2 sulfate solution a good conductor of electricity? 3)why is water a poor conductor of electricity ,
Monday, November 22, 2010 at 1:25pm by olivia

Electricity
Refrigerators requires a lot of electricity and uses the most electrical energy in most households. Why do refrigerators require so much energy to be operated?
Tuesday, April 8, 2014 at 2:51pm by Sasha

Physics
http://www.thebakken.org/electricity/science-of-static.html
Sunday, December 28, 2008 at 1:35pm by bobpursley

Chemistry
Which of these is more efficient on a large/small scale (power generation) and why? burning hydrogen to generate heat to drive turbines to produce electricity or directly producing electricity in a fuel cell reaction Can hydrogen be piped into homes, offices the way natural ...
Sunday, May 8, 2011 at 2:37pm by Alicia

physics(electricity)
Use the following formula: E(volt) * q(coloumb) = W(joule)
Monday, February 25, 2013 at 11:55am by Airlangga

English
1. What do you think of a solar house? - I think the solar house makes money for us. - I think the solar house makes energy from the sun. - I think the solar house uses the sun to make energy. - I think the solar house uses the sun to make electricity. - I think the solar ...
Wednesday, November 18, 2009 at 7:22pm by rfvv

Science~!
This is out of my field but I think turbines is the right answer. I have done some geothermal work (the chemistry of it and not the engineering part) and in all cases the pressure was to run turbines which in turn generated electricity. Water and wind also run turbines to ...
Tuesday, February 11, 2014 at 3:45pm by DrBob222

Physics
Why would you get an e3lectric shock if you flew a kite close to the electricity wires?
Tuesday, March 13, 2012 at 4:24pm by Ruth

Physics
Why would you get an e3lectric shock if you flew a kite close to the electricity wires?
Tuesday, March 13, 2012 at 5:01pm by Ruth

English
To protect the environment, what do you have to do? 1. I'd better use less water. 2. I'd better take the stairs instead of the elevator. 3. I'd better ride my bike to school. 4. I'd better use less electricity. 5. I'd better not use paper cups or plates. 6. I'd better not use ...
Tuesday, April 8, 2014 at 9:44pm by rfvv

physics: Electricity/Resistance
I forgot to say "take the reciprocal". Does that make more sense?
Monday, February 16, 2009 at 7:48am by charlie

electricity
A dishwasher uses more electricity. Modern ones use less water but when you wash dishes by hand, it's not necessary to let the water run. However, I agree it is more sanitary to use the dishwasher! Sra
Friday, October 3, 2008 at 7:14pm by SraJMcGin

Chemistry
The addition of CH3OH to an aqueous solution will cause the mass to increase. Of course. It will cause the freezing point to decrease. of course. It will cause the boiling point to increase. of course. What's left? Does CH3OH conduct electricity? Does pure water conduct ...
Wednesday, February 23, 2011 at 10:55pm by DrBob222

English
Sunlight hits the solar cells on the backpack. The solar cells change sunlight into electricity. The electricity is stored in the battery. A cell phone or an MP3 player can be plugged into it. (In this passage, what does 'it' refer to in the last sentence?)
Tuesday, December 7, 2010 at 4:28pm by rfvv

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

science
why is copper used for electrical wiring? The have writen 'Copper is a good conductor of electricity.' Is this correct? Yes, copper is a good conductor of electricity. It also is ductile (easily drawn into wires) (extruded), copper ore is realitively plentiful, etc.
Sunday, April 1, 2007 at 3:02pm by sean

physics
What are the dangers associated with electricity in your home? What can be done to limit or prevent the possibilities of dying or getting hurt?
Tuesday, August 31, 2010 at 7:28pm by Anonymous

physics
What are the dangers associated with electricity in your home? What can be done to limit or prevent the possibilities of dying or getting hurt?
Wednesday, September 1, 2010 at 6:23pm by Anonymous

Science -Electricity
A complete circut requires an _____ ____ for electricity to flow from the ______to the _______ in the circut and ______to the battery. I'm trying to fill in the blanks. I think the first two are electric current think the second two are positive and negative but unsure of the ...
Thursday, May 14, 2009 at 8:23pm by Adam

Science
I want to make a small model of how electricity is created by burning coal. I want to show a model that works and be able to light up and very small light bulb(the ones found in an average school microscope). How would I do this. You will find this difficult. I would suggest ...
Monday, December 18, 2006 at 3:51pm by Gina

Pie Charts
On the pie chart it reads: 1999 U.S. Electricity Generation by Fuel Type (Billion Kilowat hours) Coal: 1882, 51% Natural Gas:565 15.3% Petroleum: 119, 3.2% Nuclear: 728, 19.7% Hydroelectric: 307, 8.3% Other Renewables: 89, 2.5% What was the total amount of electricity ...
Thursday, December 13, 2012 at 10:15pm by Jake

Static Electricity. 11th Grade Pre-AP Physics
all correct., except I wont do the calculations for you.
Friday, February 25, 2011 at 2:08pm by bobpursley

college Physics
You are in closed room somehwere on Earth. You have no compas, gyroscope or GPS. No TV, phone, FAX, emil, computer, internet, or cell. No cable no external connections with outside networks. However you have electricity the regular network and a lab with all sort of electric ...
Monday, April 12, 2010 at 11:27am by DL

physics: Electricity/Resistance
I get it. My text shows your formula, but recommends 1/R= 1/R1+1/R2 etc as easier! I'm with you. If the numbers match, is my thinking ok?
Monday, February 16, 2009 at 7:48am by charlie

Physics-Check my answers
Why are the tires for trucks carrying gasoline and other flammable fluids manufactured to conduct electricity?
Tuesday, November 6, 2007 at 10:31pm by bob

Physics
Why is the voltage of the electricity produced by power stations is increased before its transmitted through the national grid? Please help Thanks
Tuesday, March 13, 2012 at 3:22pm by Victoria

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

Electricity
How long will it take to? 500 kms of wire, 1 curcuit breaker at one end and light at the other end. How long will it take, once the breaker is on for the electricity to travel 500kms to turn the light on.
Friday, August 6, 2010 at 5:56pm by Kevin

Chemistry
1. If a solution has a high conductivity, it indicates that there are a lot of __________________ in solution. [Answer: ions] This is ok. 2. Pure acetic acid does not conduct electricity, nor does pure water, but a mixture of the two does conduct. This is explained by ...
Tuesday, November 24, 2009 at 4:35pm by DrBob222

Physics/ electricity
Add the voltages from each corner, potential is a scalar, and does not have direction. V= k(29.3nC)( 2/(.097*.707)) check that.
Tuesday, February 22, 2011 at 1:44pm by bobpursley

physics
need help can someone please tell me Electricity is often converted into other forms of energy. List 3 examples.
Thursday, January 5, 2012 at 8:46pm by jenny

physics
how can we collect sound energy from outside? then it can be converted into electricity with the help of transducer. Have to prepare a model on this. Please earlier.
Tuesday, October 9, 2012 at 8:33pm by edward

Physics
I think its possible. How can the toy cars are controlled with a controller? isn't that an example of electricity been carried through air? If not then am wrong.
Monday, June 17, 2013 at 12:29am by anon

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