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October 25, 2014

Search: electrical

Number of results: 851

Someone please help me with science?
1. Which of the following shows the correct sequence of energy transformations when listening to the radio? electrical; kinetic; sound; kinetic; electrical electrical; sound; kinetic; sound; electrical sound; electrical; kinetic; electrical; sound kinetic; sound; electrical; ...
April 16, 2013 by Rebekah

7TH GRADE SCIENCE?!?!
1. Which of the following shows the correct sequence of energy transformations when listening to the radio? electrical; kinetic; sound; kinetic; electrical electrical; sound; kinetic; sound; electrical sound; electrical; kinetic; electrical; sound kinetic; sound; electrical; ...
April 16, 2013 by Rebekah

Science
How does an electrical current in a circuit produce thermal, sound, and magnetic energy? The electrical current flows thru devices that convert the electrical energy to mechanical or electomagnetic waves. i have a science project do tommorrow but i need some pictures of the ...
March 29, 2007 by SasukeUchihaFanatic

electrical
The minimum size of a electrical cable recomended for use in power circuit is.
November 1, 2009 by john

electrical technology
explain the importance of the telephone hammer in electrical installation
February 11, 2010 by shaquille

electrical
The minimum size of electrical cable recomended for use inpower circuits by the NEC in adomestic installation is
October 31, 2009 by Brannico

Science
What does a source of electrical energy do in an electrical circuit?
December 14, 2006 by Icy Rose

Grade 12 Chem - please check answer
The four possible unknown chemicals are: Cu(s), Ca(OH)2(s), KNO3(aq) and C6H12O6(aq). a) colorless solutions, high electrical conductivity, no change on litmus paper b)white crystals, no electrical conductivity, red to blue on litmus c) shiny brown wire, high electrical ...
June 1, 2008 by Laura

University Physics II
A 13.9 nC charge is located at position (x,y) = (1cm,2cm). A. At what (x,y) position is the electrical field -225,000i_hat N/C? B. At what (x,y) position is the electrical field (-161,000i_hat + 80,500j_hat) N/C? C. At what (x,y) position is the electrical field (-21,600i_hat...
March 23, 2010 by Becky

physics
Explain how voltage current and resistance could interact to give a person a severe electrical shock if he or she touched an electrical wire in the wrong way.
November 11, 2007 by Lila

physics
an electrical baseboard heater drawws a current of 6.0A and has a potential difference of 240V. For how long must it remain on to use 220 000 J of electrical energy.
December 13, 2009 by Lexipoo

chemistry
Which phase of ionic compounds are good electrical conductors because the ions are free to carry electrical current? A. Solid B. Liquid C. Gas D. Crystalline I say B
November 10, 2012 by shana

science
i need help finding some household items that have some of the following forms of energy: radiant, chemical, nuclear, electrical, acoustic, thermal, and mechanical. so far i have the TV as electrical, acoustic, and mechanical; the stove top as electrical, caustic, mechanical, ...
January 6, 2011 by Bri

Electrical Switches
What are the factors you consider when buying an electrical switch? I want to know what different people consider in order to obtain a good selection procedure. Thanks!
November 25, 2010 by Claire

psychology
Neurons communicate with each other through: a) electrical language only b)electrical and hemical language c) the glial cells d)neurogenesis Is C correct answer?THANK YOU
March 3, 2010 by vedrana

Science
Please help. Copper has a low electrical conductor means a charge can move thru it easily? (right?) electrical resistance is measured in units of volts. - (right?)
June 3, 2010 by Joshuah

Physics
If the price of electrical energy is $0.10 per kilowatt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degrees Celcius?
February 15, 2011 by Heather

physics
please check this: Which sentence best describes electrical conductors? a. electrical conductors have low mass density b. electrical conductors have high tensile strength c. electrical conductors have electric charges that move freely d. electrical conductors are poor heat ...
March 14, 2009 by physics

Physics/Chemistry
If the price of electrical energy is $0.10 per kilowatt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degrees Celcius?
February 15, 2011 by Heather

Science
Which of these energy changes takes place in a solar cell? A.Heat energy to light energy B.Light energy to electrical energy C.Electrical energy to heat energy D.Thermal energy to electrical energy C?
April 2, 2012 by Rezu

Science
What type of energy from the Sun do plants use to make their own food? A.Chemical Energy B.Sound Energy C.Light Energy D.Heat Energy C? An MP3 player uses the chemical energy in a battery to produce electricity energy. The electrical energy makes the player work.When turned on...
April 2, 2012 by Rezu

Physics
One million spherical points join a point.Radius of any point is r=5x10^-4cm, while electrical load is q=1.6x10^-14C.What is the energy that should be spent for possession of electrical forces?
January 18, 2013 by fjolla

physics
If the price of electrical energy is $0.10 per kilo-watt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degree C? Can anyone please give me some hints to do it? Thanks a lot!
February 10, 2008 by Charolett

physics
An oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat energy. If the light bulb converts 75% of the electrical energy to thermal energy, and the oven is used for a ...
May 30, 2013 by maddy

Pre algebra
Electrical poles that carry electrical wire seem to get smaller the farther away they are. Find the apparent height of each pole if the tallest pole is 50 ft tall and there is 100 ft between each pole.
March 25, 2013 by Shanequa

physics
Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (canít happen) at what rate would ...
January 10, 2007 by Brian

physics
Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (canít happen) at what rate would ...
January 11, 2007 by Brian

Science Plzz Help
3. Which of the following correctly describes how nerve impulses move throughout the body? A. electrical transmission through neurons and electrical transmission between neurons B. chemical transmission through neurons and chemical transmission between neurons C. chemical ...
June 1, 2014 by Mstv

Physics
An electrical cable is atteched to the electrical pole 25m apart. The cable weighs 2.5N/m and can resist a pull of 300N . assuming that the cable takes a parabolic shape, detrmine the smallest value of sag in the cable
April 1, 2013 by Nirpendra

Physics
A power plant burns coal and generates an average of 630.0 MW of electrical power while discharging 1058.40 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period.
January 6, 2014 by Nika

science
what is the importance of fuses? They are placed in electrical equipment and in houses (although most houses now use circuit breakers) as safety devices. If a short occurs and too much electrical current is going through the circuit, the fuse "blows" (meaning it melts, the ...
April 23, 2007 by garret

Psychology
The means of travel within and between neurons is different because: A. electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons. B. chemical signals move the impulses within the neuron, while electrical signals move impulses...
April 12, 2013 by Angela

unstanding psychology
the means of travel within and between neurons is different because: a. electrical signals move impulses within the neuron, while chemical signals move the impulses between neuron. b. chemical signals move the impulses within the neuron, while electrical signal moves impulses ...
July 20, 2011 by Deanie

chem
Explain, in terms of electrical energy, how the operation of a voltaic cell differs from the operation of an electrolytic cell used in the Hall process. Include both the voltaic cell and the electrolytic cell in your answer. Would this be correct: In a voltaic cell, chemical ...
April 20, 2009 by Anonymous

Psychology
The means of travel within and between neurons is different because: A. electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons. B. chemical signals move the impulses within the neuron, while electrical signals move impulses...
April 11, 2013 by Angela

psychology
the means of travel within and between neurons is different because: a. electrical signals move impulses within the neuron, while chemical signals move the impulses between neuron. b. chemical signals move the impulses within the neuron, while electrical signal moves impulses...
August 12, 2011 by lachelle mitchell

Physics
Could someone please help me with these questions. . . 1. Why are there positive and negative electrical charges, while magnetic poles always seem to be bound together? 2.If two resistors are connected in parallel, how do you know that their effective resistance will always be...
December 3, 2007 by Adam

Physiology Midterm exam
1- List at least 5 most striking morphological and functional characteristics of nerves tissue make it different from other tissues? 2- Point out the advantages and disadvantages of chemical synapses as compared to electrical ones. Where in the human body can you find ...
April 22, 2013 by Physiology

physics
The Easy Bake Oven is a common toy for young children who want to emulate the process of cooking. Suppose this oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat ...
May 30, 2013 by Julia

physics
i'm still getting C as the answer to this one drwl said its wrong When a positive charge moves in teh direction of the electrical field, what happens to the electrical potential energy associated with the charge? a. increase b. decreases c. remains the same d. increases ...
March 12, 2009 by physics

Physics
A wind turbine has blades that sweep an area of 2000m2. It converts the power available in the wind to electrical power with an efficiency of 50%. What is the electrical power generated if the wind speed is 10msĖ1? (The density of air is 1.3 kg mĖ3.)
June 3, 2014 by Me

PRE ALGEBRA
solution to electrical poles that carry electrical wire seem to get smaller the further away you are. Find the apparent height of each pole if the tallest pole is 50 feet tall and there is 100 feet between poles.
January 23, 2014 by BEV

Chemistry
1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...
March 27, 2013 by Jose

Chemistry
1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...
March 27, 2013 by Jack

Science
Megan wants to determine if an electrical circuit has electricity flowing through it. Which of the following evidence is proof that the circuit has an electrical current? a)The circuit is a closed loop. b)A light bulb is lit in the circuit. c)The circuit's switch is in the ...
April 4, 2012 by Isabella please help me

Intro to psychology
The brain can be studied by using: A.) electrical, biochemical, and meagnetic means B.) Radio reguencies,computers and neurotransmission C.)neurotransmitting, electrical,and biochemical means D.) biochemical,neurotransmitting, and magnetic means I think the answer is C but unsure
January 5, 2012 by pateyn

college physics
(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 18, 2013 by suhani

college physics
(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 21, 2013 by vishal

college physics
a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 22, 2013 by vishal

college physics
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 28, 2013 by physics

PHYSICS
(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 13, 2013 by smita

physics
(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 16, 2013 by suhani

PHYSICS
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 22, 2013 by suhani

PHYSICS
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 24, 2013 by suhani

PHYSICS
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 27, 2013 by suhani

PHYSICS
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 28, 2013 by physics

PHYSICS
Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...
September 29, 2013 by physics

Physics 221
An electron that is a certain distance from a proton is acted on by an electrical force. a) If the electron were moved twice the distance away from the proton, would the electrical force be:
December 30, 2013 by Jamaal

Physics Help Please!
If the price of electrical enegy is $0.10 per kilowatt *hour, find the cost of using electrical energy to heat the water in a 12.0m * 9.00m * 1.5m swimming pool from 15 degrees C to 27 degrees C. So the change in temperature is 285.15 , the volume is 162m^3, the specific heat ...
April 6, 2010 by Dave

math
Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the resistance increasing ...
May 2, 2010 by christine

Physics multiple choice questions
1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...
April 7, 2014 by Jessica

Physics multiple choice questions
1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...
April 8, 2014 by Jessica

physics
A 120-V motor has mechanical power output of 3.00 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the energy delivered to the motor by electrical transmission in 2.00 h of operation. Do i divide the power by...
August 17, 2010 by blast

Psychology
According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...
April 11, 2013 by Angela

Psychology
According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...
April 12, 2013 by Angela

Science
Molecules that make up matter move constantly.Which of these forms of energy refers to the energy of the moving molecules and why? A.Chemical Energy B.Thermal Energy C.Electrical Energy D.Light Energy Which device can change electrical energy to light and sound energy? A....
April 2, 2012 by Rezu

gen physics II
Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m2 using paper (k= 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate ...
July 26, 2010 by Alinkashia

Psychology
According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...
April 12, 2013 by Angela

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

psychology
The brain can be studied by using: A)electrical,biochemical and magnetic means B)radio frequences,computers and neurotransmission C)neurotransmitting,electrical and biochemical means D)biochemical,neurotransmitting,and magnetic means, I THINK CORRECT ANSWER IS A OR B
September 21, 2009 by vedrana

Science
The brain can be studied by using: (Points: 5) electrical, biochemical, and magnetic means. radio frequencies, computers, and neurotransmission. neurotransmitting, electrical, and biochemical means. biochemical, neurotransmitting, and magnetic means. i think it is C but not sure
March 17, 2011 by Chloe

calculus
Throughout the 20th century, the yearly consumption of electricity in the US increased exponentially at a continuous rate of 7% per year. Assume this trend continues and that the electrical energy consumed in 1900 was 1.4 million megawatt-hours. Find the average yearly ...
January 19, 2012 by Cookie

Psychology
According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...
April 12, 2013 by Angela

science
A researcher determined the amount of electrical energy entering a toaster and the amount of heat given off by the toaster. The amount of heat was less than the amount of electrical energy. How can this observation be explained?
April 3, 2014 by victoria

psychology
The brain can be studied using: A. electrical, biochemical and magnetic means. B. radio frequencies, computers, and neurotransmission. C. neurotransmitting, electrical, and biochemical means D. biochemical, neurotransmitting, and magnetic means. I think its A, but not so sure ...
October 10, 2013 by glory

SCIENCE HELP!!??
Hi Please any one can help me in my science homework It is Imagine that you were driving in a car and it was raining, what would be the froces acting around the car and what would the electrical charges bee around the car, on the base and in the sky. I will be happy to ...
January 25, 2007 by AQW

Psychology
A physiological support of hypnosis as a different state of consciousness is: (Points: 5) rapid eye movement initiated when a person is hypnotized. a change in the electrical activity of the brain in hypnosis. the sense of time removed. reaction time slows down. I believe it ...
May 8, 2013 by angela

Psychology
A physiological support of hypnosis as a different state of consciousness is: (Points: 5) rapid eye movement initiated when a person is hypnotized. a change in the electrical activity of the brain in hypnosis. the sense of time removed. reaction time slows down. I believe it ...
May 10, 2013 by Angela

Math ( Surveying )
Need help with this problem! Thanks in advance. The ground clearance of an overhead electrical cable must be determined. Surveyor B is positioned directly under the cable (surveyor B can make a position check by sighting past the string of a plumb bob, held in his or her ...
September 20, 2010 by Dale

science-chem
if i am given 2 pairs of aqueous solutions and I need to know which one has lower electrical conductivity? Are my answers correct? Ex/1M magneisium bromide and 1M lithium bromide.....Litium Bro. has lower electrical conductivity Ex? 1M Potassium phosphate or 1 M potassium ...
September 17, 2009 by Ally

STATISTICS
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its mean and standard ...
October 30, 2007 by LT

Psychology
The means of travel within and between neurons is different becuase: a. eletrial signals move impulses within the neuron, while chemical signals move the impulses between neurons. b. chemical signals move the impulses within the neuron, while electrical signals move impulses ...
February 22, 2012 by Deb

Elementary Statistics help
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its mean and standard ...
October 29, 2007 by LT

Electrical versus Gravitational Forces (Physics)
Multiple Choice help: * _____ forces between charges are enormous in comparison to ______ forces. * A. electrical, gravitational (possible?) B. gravitational, electrical (possible?) C. positive, negative (wrong, I think) D. negative, positive (wrong, I think) According to the ...
February 25, 2011 by Angela

Psychology
According to the all-or-none law: a. all axons in an area will fight at a given signal. b. an axon moves from its resting state with various degrees of stimulation. c. only sufficient electrical activity will cause the axon to fire. d. there is a gradual buildup of electrical ...
November 6, 2011 by Kasey

physics
A 120-V motor has mechanical power output of 2.20 hp. It is 92.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (A) (b) Find the energy delivered to the motor by electrical transmission in 2....
September 5, 2013 by priya

physics
A)When the energy input to gas fired power station is 1000MJ,the electrical energy output is 300MJ.What is the efficiency of the power station in changing the energy in gas into electrical energy b)what form does the 700MJ of lost energy take c)what is the fate of the lost energy
August 3, 2011 by Luc

Biology
Which one of the following statements about sense receptors is true? A)Chemicals, light and pressure convert stimuli into electrical implses. B) Electrical impulses within the nerve pathways trigger an awareness of stimuli in the sensory receptors C)Sensory receptors are ...
August 31, 2010 by Rena

physics
A 120-V motor has mechanical power output of 3.20 hp. It is 81.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor. Answer: 24.6A (b) Find the energy delivered to the motor by electrical ...
May 2, 2011 by iva

physics
A power plant burns coal and generates an average of 600.0 Megawatts (MW) of electrical power while discharging 900.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. Coals vary a lot in their energy content. The energy released by...
January 6, 2014 by Nika

Physics -- check answers please
1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...
April 7, 2014 by Jessica

Biology
Which onf of the following statments about sense resceptors is trus? A) Chemicals, light and pressure convert stimuli into electrical impluses. B) Electrical impluses within the nerve pathways trigger an awareness of stimuli in the sensory receptors. c) Sensory receptors are ...
September 3, 2010 by Rena

Math
How many liters of oil are required to supply the electrical energy needs of an average home for a month? Energy released by burning 1 liter of oil= 1.2 x 10(7th power) Electrical energy used in an average home daily 5 X 10 (7th power) I got 125 liters. Is that correct?
September 20, 2012 by Sam

physics
PLEASE EXPLAIN A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 ◊ 10−19 J as it moves. Find the magnitude of the charge on the moving ...
February 16, 2010 by Jonathan

physics
If all the solid waste of 230 million tonnes were burned in waste-to-energy power plants that are 20% efficient, a) how many kilowatt-hours of electrical energy could be produced in a year? Compare this quantity with the total U.S. electrical energy production of approximately...
November 5, 2013 by nicole

physics
If all the solid waste of 230 million tonnes were burned in waste-to-energy power plants that are 20% efficient, a) how many kilowatt-hours of electrical energy could be produced in a year? Compare this quantity with the total U.S. electrical energy production of approximately...
November 5, 2013 by nicole

physics
A charge moves a distance of 1.4 cm in the direction of a uniform electric field having a magnitude of 244 N/C. The electrical potential energy of the charge decreases by 108.3 ◊ 10−19 J as it moves. Find the magnitude of the charge on the moving particle. The electrical...
February 8, 2013 by EMily

physics
Information: 1. According to the information on the EERE posting, 22% of the U.S. annual electrical energy consumption is for lighting. The amount of energy is 8.2 Quads, (1.0 Quad = 1015 BTU). This is in agreement with the information given in the International Energy Agency...
April 20, 2008 by Tim

Material Science
Pure copper wire of diameter = 2.0 mm has an electrical resistance, R, of 0.005 ohm/m (upside down U/m). p = 8900 kg/ m cubed, Cp= 440 J/(kg K). Passage of electrical current produces thermal energy generation = I triangle V= I squared R (J/sec). Note that Units: Volts = J/...
August 24, 2013 by Joy

Engineering
Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4->FeSO4+H2 It is apparent that they must use an outside source of electrical power to drive the dissolution of the iron. They use a small current so that the ...
December 15, 2013 by A

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