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July 25, 2014

Search: Physics/ electricity

Number of results: 55,414

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!!!
October 29, 2013 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????
June 17, 2013 by anonymous

physics
explain the close relationship between magnetism and electricity? and How can electricity produce magnetism, and magnetism produce electricity.
July 3, 2009 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 ...
November 3, 2011 by pakilina

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?
December 28, 2008 by Jane

physics
Can water,air and earth conduct electricity? If yes, then explain how they conduct electricity.
February 3, 2012 by mikylexes

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 ...
January 22, 2012 by 12-year-old-poet

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
August 16, 2009 by Yadira M

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...
February 13, 2011 by Kathy R

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.
October 5, 2010 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?
December 7, 2010 by Mike

Science
Why do we have an electricity crisis? What will happen if we don't save electricity?
April 15, 2009 by Rochelle

Science
I need help with static electricity and generating current electricity.
November 13, 2012 by Aamira

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, ...
July 11, 2010 by seth

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...
August 9, 2010 by Anonymous

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, ...
April 13, 2012 by Anonymous

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, ...
July 30, 2011 by norma

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...
April 13, 2010 by Katelynn

Science
Solid table salt does not conduct electricity. How does dissolving salt in water allow electricity to flow?
December 1, 2009 by Easton

science
Why are plasmas able to conduct electricity? Plasmas are electricity: all ions, free to move.
January 23, 2007 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:)
April 9, 2013 by Olly

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...
November 30, 2009 by Zach

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)...
April 4, 2012 by Mia pleaseee helppp

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

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.
February 7, 2007 by Jessica

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.
May 3, 2013 by james

physics
why woods do not radiate electricity?
January 9, 2009 by Alveera

physics
5 usage for electricity.(in points)
October 10, 2012 by sumi

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...
October 20, 2006 by Joe

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 ...
November 22, 2010 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...
November 22, 2010 by Pleseansermi

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...
November 24, 2009 by .

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...
June 1, 2011 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...
June 2, 2011 by Nelly

physics (electricity)
what is charging(electrifying) by induction?
June 12, 2008 by Naomi

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 ...
December 4, 2012 by alice

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 ...
June 23, 2013 by david

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?
November 3, 2011 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 ,
November 22, 2010 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?
April 8, 2014 by Sasha

Physics
Why is using mirrors to generate electricity not a common practice?
March 20, 2014 by Cherie

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 ...
May 8, 2011 by Alicia

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 ...
April 8, 2014 by rfvv

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 ...
November 18, 2009 by rfvv

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 ...
December 13, 2012 by Jake

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

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

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?)
December 7, 2010 by rfvv

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.
April 1, 2007 by sean

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

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 ...
December 18, 2006 by Gina

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 ...
May 14, 2009 by Adam

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?
August 31, 2010 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?
September 1, 2010 by Anonymous

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 ...
April 12, 2010 by DL

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.
August 6, 2010 by Kevin

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

electricity 188
hi my name is christina and i have an electrical question i need help with. i am taking power engineering electrical 188. the question is: how much will ity cost to use 6 lamps of 100 W each if they burn for 5 hours each evening in a month (30 days). the cost of electricity is...
February 24, 2008 by christina

English
A: What do you think of a solar house. 1. I think the solar house makes money for us. 2. I think we can save energy thanks to the solar house. 3. I think we don't need to spend money on electricity. 4. I think we don't need to pay the electricity fee. 5. I think it is a good ...
November 18, 2010 by rfvv

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
need help can someone please tell me Electricity is often converted into other forms of energy. List 3 examples.
January 5, 2012 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.
October 9, 2012 by edward

Environmental Science
True or False: 28. Hydroelectric energy is produced by flowing water turning a turbine which generates electricity. TRUE 32. Geothermal energy is generated when heated water or steam is pumped up from inside the Earth to power a turbine that generates electricity. TRUE Am I ...
March 1, 2010 by y912f

physics
electricity is measured in kilowatts-hours, kW*h. this quantity can be converted to which other unit that measures energy? a.Pascals b.Joules c.Newtons d. Watts
April 12, 2011 by jason

Math 2
The instruction booklet for a DVD player says that the player uses about 0.4 kilowatt of electricity per hour. If electricity costs $0.20 per kilowatt per hour. How much does it cost to run the player for an hour?
May 2, 2014 by Jenny 2

Econ - help please
demand for sulfur dioxide by coal-fired electricity electricity producers is: P= 1,000 - 16Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide. a)With no policies or restrictions on sulfur emisssions, how much sulfur ...
November 14, 2011 by Sushmitha

Physics check
Today's nuclear power plants use nuclear..... to generate electricity. fission?
April 25, 2008 by Emily

statistics
Ok, so I'm trying to do this for my exam review. I get some of it, but not all: An electric utility is examining the relationship between temperature and electricity use in its service region on warm days. The utility has bivariate data detailing the maximum temperature (...
May 15, 2010 by peter

chemistry
Acids that form ionic solutions will conduct electricity. Acids that form covalent solutions will not conduct electricity. but acids have HYDROGEN in them and hydrogen is a gas is that why the results of the conduction test need to be changed because hydrogen is a non metal ...
November 1, 2008 by lila

science
solar,wind,nuclear,and hydroelectric energy sources are similar in which of the following ways? A. they are all nonrenewable energy sources B. they all require an indirect use of sunlight in order to make electricity C. they are all considered alternative energy sources D. ...
April 29, 2014 by help plzz

Physics
How many excess electrons does an object with a total charge of -1.0 x 10exp-9C have on it? This is approximately the amount of charge involved in commonly encountered static electricity.
May 10, 2010 by Nina

English
1. The solar cell could change sunlight directly into electricity. 2. The solar cell could directly change sunlight into electricity. (Are both acceptable? What is the suitable position of 'directly'? Which one is right?)
June 15, 2011 by rfvv

English
1. The solar cell could change sunlight directly into electricity. 2. The solar cell could directly change sunlight into electricity. (Are both the same? Check the position of 'directly' in each xentence, please.)
June 18, 2011 by rfvv

Electricity
Very very urgent please help me... A small ball with mass =0,4g charged with electricity= 3x10^(-10) coulomb is united with the edge of a silk rope with length=8cm. The other edge of the rope is on a big insulating material with concentration of the electric energy: 25x10^(-6...
November 2, 2008 by Ryan

physics
A total of 10000kg of water per second flows over a waterfall 30m high.If half of the power this flow represents could be converted into electricity, how many 100-W lightbulbs could be suplied?
November 15, 2011 by Ania

Physics
A total of 100000 kg of water per second flows over a waterfall 30 m high. If half of the power this flow represents could be converted into electricity, how many 100 watt lightbulbs could be supplied?
February 2, 2013 by Olivia

algebra
Finances. During one month, a homeowner used 500 units of electricity and 100 units of gas for a total cost of $352. The next month, 400 units of electricity and 150 units of gas were used for a total cost of $304. Find the cost per unit of gas. Please show the work. Thanks
March 29, 2012 by PLEASE NEED HELP

science
A group of wind turbines operates in an open field. Which statement about the wind turbines is true? Answer A. The wind turbines produce movement of air that does work. B. The wind turbines do work by using electricity to produce power. C. The wind turbines cannot do work ...
April 30, 2013 by Anonymous

Physics 103
How do I solve this problem: You buy a 75W lightbulb in Europe where electricity is delivered to homes at 240V. If you use the lightbulb back in the USA at 120 V, what will it's power output be?
February 4, 2010 by Sandra

Physics ( electricity)
An electrom (qe = -1.6^-19 Coulomb) moves a distance of 0.170m in an 8.00 N/C electric field. Using appropriate formulas and a logical method, find the energy gained by the electrom. Whoa ... how do I do this???
May 27, 2012 by Art

Econ - please help
demand for sulfur dioxide by coal-fired electricity electricity producers is: P= 1,000 - 16Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide. Supposed EPA restricted the number of one-ton sulfur dioxide permits to ...
November 15, 2011 by Sushmitha

Physics/electricity
Eighteen-gauge wire has a diameter of 1.024 mm. Calculate the resistance of 19 m of 18 gauge lead wire at 20C.
October 6, 2013 by Joe

Physics (just checking it)
q:The electricity revised at an electric substation has a potential difference of 2.80 10^5V, if the required output is 440 V. what should be the ratio of the turns of the step-down transformer? a: 28000/440= 636
June 4, 2008 by BAdams

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
Three resistors (15, 20, 25 ohms in this order) are connected to a 13-V battery . The internal resistance of the battery is negligible. What is the voltage difference across the 20-Ω resistance?
April 4, 2013 by Amy

Physics
Why, when you stroke a cat's fur, or comb your hair on a cold, dry day can you hear a crackling sound? Doing these things in a darkened room, you can actually see sparks. Explain. Please explain to me! Thanx !! Static electricity builds up with a positive charge on one of the ...
January 19, 2007 by AG

Physics/electricity
In the Bohr model of the hydrogen atom, an electron in the 2nd excited state moves at a speed of 5.48X10^5 m/s in a circular path having a radius of 2.12X10^-10 m. What is the effective current associated with this orbiting electron?
October 6, 2013 by Derrick

Physics
Water is boiled by burning coal. The resulting steam blows agains huge turbine blades. The turning blades spin in a magnetic field, producing electricity. Describe in order the energy conversions.
March 24, 2014 by Catherine

physics
a large nuclear power plant generates electric energy at the rate of 1000 MW. how many joules of electricity does the plant generate in one day? what is the mass of this much energy?
October 25, 2013 by Ali

electricity
the magnitude of the voltage induced in a conductor moving through a stationary magnetic field depends on the ------- and the------- of the conductor. A)lenght, speed. B)distance, circumference. C)resistance, current. D)color, capacitance. length and speed...you are cutting ...
August 23, 2005 by angela

Physics
Please check my answers: The voltage across a 10-ohm resistor carrying 3 amps must be? I got 30 volts-v=?, I=3 amps, R= 16 ohm. v= 30 amps * 10 ohm=30 volts A 4-ohm resistor is connected in parallel with a 6 ohm resistor. What is the total resistance of this pair of resistors...
October 24, 2007 by Shay

science
A substance in a solid at room temperature. It is unable to conduct electricity as a solid but can conduct electricity as a liquid. This compound melts at 755 degrees celsius. Would you expect this compound to have ionic bonds, metallic bonds, or covalent bonds? A) metallic ...
February 28, 2008 by JAKE

Science
13. If we used wave energy to produce electricity, which of the following would be a positive environmental benefit? A) We would have power to run lights on navigation buoys B) We would reduce the amount of fossil fuels used to produce electricity and reduce pollution. C) The ...
November 11, 2013 by Cassie

Chem
Sodium cyanide NaCN is a solid which melts at 564C to give a liquid that conducts electricity, It also dissolves in water to give a conduction solution. Deduce the type of bonding that holds the compound together and why? Write a balanced chemical equation for the reaction ...
March 12, 2007 by Anthony

physics
Lightening is an atmospheric discharge of electricity accompanied by thunder, which typically occurs during thunderstorms. How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
October 15, 2009 by Alyson

physics(electricity)
A 9V battery has an electric potential difference of 9V between the positive and negative terminals. How much kinetic energy in J would an electron gain if it moved from the negative terminal to the positive one?
February 25, 2013 by Anonymous 007

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

ECON
demand for sulfur dioxide by coal-fired electricity electricity producers is: P= 1,000 - 16Q where Q is quantity of sulfur dioxide measured in thousands of tons, and P is price per ton of sulfur dioxide. a)With no policies or restrictions on sulfur emisssions, how much sulfur ...
November 14, 2011 by Sushmitha

physics - electricity
Does the size of a 1,5V cell(battery) affect the internal resistance of a circuit containing: 3 different size batteries,multimeter,connecting wire,a light bulb resistor.How do i set up this experiment.I'm really lost, please help. Thank you in advance
May 23, 2010 by Luke

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

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