Number of results: 21,571
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?
Tuesday, February 15, 2011 at 5:45pm by Heather
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?
Tuesday, February 15, 2011 at 6:41pm 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?
Monday, April 2, 2012 at 5:42pm by Rezu
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!
Sunday, February 10, 2008 at 5:01pm by Charolett
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; ...
Tuesday, April 16, 2013 at 11:41pm by Rebekah
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; ...
Tuesday, April 16, 2013 at 10:52pm by Rebekah
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...
Monday, April 2, 2012 at 6:38pm by Rezu
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....
Monday, April 2, 2012 at 5:06pm by Rezu
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 ...
Wednesday, March 27, 2013 at 2:32pm by Jack
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 ...
Wednesday, March 27, 2013 at 1:34pm by Jose
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
Wednesday, August 3, 2011 at 4:58am by Luc
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 (can’t happen) at what rate ...
Thursday, January 11, 2007 at 2:50pm 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 (can’t happen) at what rate ...
Wednesday, January 10, 2007 at 8:44pm by Brian
Science
Batteries change ____ energy into _____ energy Chemical and electric Converting the suns energy into electricity does not work if it is ____ time or there is ___ weather night and bad? The suns energy can be turned into electrical energy or ___ energy solar? A toaster ...
Wednesday, September 19, 2012 at 8:10pm by Lance
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 ...
Thursday, March 29, 2007 at 7:58pm by SasukeUchihaFanatic
7TH GRADE SCIENCE?!?!
The law of conservation of energy states that _____ is never created or destroyed. (1 point) Unselected answer (0 pts) mass Correct answer (1 pt) energy Unselected answer (0 pts) heat Unselected answer (0 pts) chemicals 1 /1 point 2. Unlike other forms of energy, thermal ...
Tuesday, April 16, 2013 at 11:41pm by Anonymous
physics
electricl energy is turned into light energy in a light bulb. electrical energy is turned into sound energy by speakers a nuclear reactor turns nuclear energy into electrical energy. What you could do is set up a 10x10 grid of the types of energy and try to come up with a ...
Sunday, December 19, 2010 at 8:02am by Dr Russ
physics
Electrical energy in = (V^2/R)*time (in Joules) (use time = 540 seconds) All of this energy is converted to heat, Q. The electrical energy required is Q = M C *(delta T) = 2000 g*[4.186 J/(deg C*g)]*40 C Use those two equations to solve for R.
Tuesday, February 16, 2010 at 3:40pm by drwls
science
A CD player, when playing, gets the energy required to turn the disc, operate a disc-reading laser, and emit an electrical sound signal to speakers, from an electrical source. That electrical energy could come either from a wall outlet or batteries. When trees burn, the mass ...
Sunday, May 10, 2009 at 7:47pm by drwls
Science
Which one of these is a form of stored energy? A. Heat energy B. Light energy C. Electrical energy D. Chemical Energy D?
Monday, April 2, 2012 at 4:26pm by Rezu
science
look at the units electrical energy (in kWh) = power (in kW) x time (in hour) cost of electricity = [electrical energy (in kWh)]*(12 cents/ kWh)
Thursday, February 10, 2011 at 10:10pm by TutorCat
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 ...
Monday, April 20, 2009 at 10:59pm by Anonymous
the big idea of energy
The Big Idea Of Energy is to do with energy being transfered from one form to another. For example...in a lightbulb the electrical energy is turned into light and heat. The electrical energy comes from your house or wherever and then turns into light to light up your lightbulb...
Tuesday, December 5, 2006 at 2:18pm by Anonomous
6th grade
Energy can come in many forms and can be transferred from one form to another. For example a flywheel rotating has a certain mechanical kinetic energy and that can be converted to potential energy by using the flywheel to wind up a rope pulling a weight up in the air. That ...
Friday, February 19, 2010 at 3:54pm by Damon
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 ...
Tuesday, April 6, 2010 at 2:51pm by Dave
physics
The primary difference between a motor and a generator is that one converts electrical energy into mechanical energy (that's the motor) and the other converts mechanical energy into electrical energy (that's the generator).
Wednesday, May 16, 2012 at 11:24am by Elena
Science
What does a source of electrical energy do in an electrical circuit?
Thursday, December 14, 2006 at 6:33pm by Icy Rose
Physics
The temperature in an electric oven is 165°C. The temperature at the outer surface in the kitchen is 55°C. The oven (surface area = 1.6 m2) is insulated with material that has a thickness of 0.023 m and a thermal conductivity of 0.045 J/(sm°C). a) How much energy ...
Wednesday, April 18, 2007 at 6:51pm by papito Urgent help needed
Science
where does this energy conversion occur? gravitional energy to kietic energy to electrical currernt. what i don't understand is what is gravitational energy?
Sunday, October 10, 2010 at 7:40pm by Izzy
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...
Sunday, April 20, 2008 at 8:40pm by Tim
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.
Sunday, December 13, 2009 at 5:34pm by Lexipoo
Physics
The temperature in an electric oven is 160°C. The temperature at the outer surface in the kitchen is 50°C. The oven ( surface area = 1.6 m2) is insulated with material that has a thickness of 0.02 m and a thermal conductivity of 0.045 J/s.m.C°. (a) How much energy ...
Wednesday, March 24, 2010 at 1:36am by Maryo
physics-energy conservation
a mordern power station,or, more correctly, an energy station, converts heat energy into electrical energy at an efficiency od 50% if the station produces electrical energy at a rate of 1.00GW from burning coal, calculate the mass of coal it burns each day. the coal it uses ...
Wednesday, May 9, 2007 at 6:57am by Emma
Science
Bobbie is playing with his radio-controlled car by using a handheld remote box. What type of energy is being used to power Bobbie's car? a)chemical energy b)electrical energy c)heat energy d)mechanical energy THANKS!!!!!
Thursday, April 12, 2012 at 8:58pm by Sally urgenttt
Science
Bobbie is playing with his radio-controlled car by using a handheld remote box. What type of energy is being used to power Bobbie's car? a)chemical energy b)electrical energy c)heat energy d)mechanical energy THANKS!!!!!
Thursday, April 12, 2012 at 8:40pm by Sally urgenttt
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?
Thursday, September 20, 2012 at 6:06pm by Sam
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 ...
Monday, July 26, 2010 at 6:44am by Alinkashia
Science
True/False - A generator that doubles the electrical energy from a wall outlet without any additional input of energy will work. - The total amount of energy in the universe is constant. thank you
Friday, November 21, 2008 at 12:08pm by Jake
Env Science
Distinguish between high-quality energy and low-quality energy, and give an example of each. Relate these terms to energy efficiency High-quality energy is energy that can be converted to work, with a high conversion efficiency. Two examples are electrical energy and ...
Monday, July 9, 2007 at 11:01am by Kim
Assist me Plzz!
What is the p.d. between 2 points in a circuit if 200J of electrical energy are changed to other forms of energy when 25 coulombs of electric charge pass? If the charge flows in 10 seconds, what is the current? Science help needed here. Vq=energy you know q, and energy.
Tuesday, April 17, 2007 at 8:49am by Demola
Science
Identify the sources of energy used to power a cell phone and other energies that it can transform into. I put Electrical Energy and it can be transformed to heat,sound,light,and mechanical energy.
Monday, April 2, 2012 at 5:40pm by Rezu
Physics
Gravitational Potential energy -> Kinetic Energy -> Electrical Energy -> Chemical Energy
Tuesday, May 15, 2012 at 11:04pm by drwls
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?
Friday, January 18, 2013 at 4:39pm by fjolla
physics
It has been proposed to use large inductors as energy storage devices. How much electrical energy is converted to light and thermal energy by a light bulb with a power of 195 W in one day? If the amount of energy calculated in part (a) is stored in an inductor in which the ...
Wednesday, March 9, 2011 at 7:59pm by Sarah
About previous Physics post/answer from Bobpursely
So do you mean to say....Ferris wheels use motors, therefore meaning that electrical energy is present. Electrical energy from the motor is then turned into kinetic energy. Electricity, generated from a switch and wires, travel through the motor which makes a magnetic field. ...
Monday, October 29, 2007 at 10:12pm by Serena
7TH GRADE SCIENCE?!?!
None of the answers are correct on the first one. Radio waves, electrical energy in radio,magnetic energy on speaker drive, kinetic motion on speaker cone, sound energy (which is a kinetic wave), to the ear drum (kinetic ear drum movement), to kinetic wave movement in the ear ...
Tuesday, April 16, 2013 at 11:41pm by bobpursley
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, ...
Thursday, January 6, 2011 at 7:13pm by Bri
science
Is the conversion of light energy to electrical energy endothermic or exothermic?
Monday, December 15, 2008 at 5:33pm by Brianne
Science 8R - help (please read!!!)
Homework - Pick 4 out of the 6 forms (types) of energy and gives an example of each from your house. Types/Forms of Energy 1. Mechanical Energy 2. Electrical Energy 3. Electromagnetic Energy 4. Heat Energy 5. Chemical Energy 6. Nuclear Energy I'm picking heat and ...
Monday, November 26, 2012 at 8:39pm by Laruen
electrical
Energy exists in different forms. Name two kinds of energy
Saturday, October 31, 2009 at 10:44pm by john
physics
Energy is in joules. Power is in watts. Sometimes electrical energy is spoken of as watt-hours, or watt-seconds, or kw-hrs. But in the end, joules is energy. Multiply watts x time to get energy.
Monday, October 22, 2007 at 3:14am by bobpursley
science
is batteries powering a flashlight an example of chemical potential energy to electrical energy?
Monday, May 20, 2013 at 10:54pm by Anonymous
Science
Electrical energy can come rom 3 types of energy: __________, __________, and __________. heat, nuclear, solar energy (sunlight)_ Thankz! :)
Tuesday, December 12, 2006 at 6:56pm by Caley
electrical
Do you mean? Energy exists in different forms. Name two kinds of mechanical energy.
Saturday, October 31, 2009 at 10:27pm by Ms. Sue
Science
Hey everyone I need some omework jelp as you can see.I'm not that well in Science so could you give me some tips? And i would like somr homework help for the following passge and answers. DIRECTIONS Read the paragraph and answer the questions. You can find examples of the ...
Thursday, October 16, 2008 at 7:34pm by Cindy
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 ...
Tuesday, February 16, 2010 at 6:16pm by Jonathan
physical science
Most folks use thermal energy a lot, and electrical energy second. In the conversion of mass to energy, energy= mass*speedofLight^2 GPE= mass*g*height so increased height means more GPE
Thursday, May 15, 2008 at 7:31pm by bobpursley
5TH GRADE SCIENCE
Hey everyone I need some omework jelp as you can see.I'm not that well in Science so could you give me some tips? And i would like somr homework help for the following passge and answers. DIRECTIONS Read the paragraph and answer the questions. You can find examples of the ...
Thursday, October 16, 2008 at 8:43pm by Cindy
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 ...
Friday, February 8, 2013 at 10:30am by EMily
science
The average solar radiation incident on the surface of the earth is about 1 KW/m2 for the entire year. A solar house is built with solar panels installed in the roof to provide the heating and electrical energy of the house. If the roof has a surface area of 100 m2 and the ...
Sunday, December 12, 2010 at 11:34am by Kim
please
The electrical potential energy loss, q*V = 5*10^-9 J , would equal the kinetic energy gain when it hits the opposite plate, (1/2) M V^2 V = sqrt(2 q V/M) = 100 m/s
Saturday, January 15, 2011 at 11:17pm by drwls
scientist
Electromagnetic (light, in this case). This type of energy can be converted to electrical more efficiently than thermal energy can. You can also think of it as thermal energy conversion from a very hot (5800 K) body (the sun), and apply the Carnot efficiency limit (about 97%).
Monday, April 9, 2012 at 9:37pm by drwls
A physics question
Yes it is right. Potential energy has very little to do with hiow ferris wheels work. It is mainly a case of electrical energy makng the motor do work overcoming bearing friction. Kinetic energy is not a factor either, except when it is starting up.
Friday, November 2, 2007 at 10:29pm by drwls
Science again...
What other form is released by a radio. A. Heat Energy B. Mechanical Energy C. Ultraviolet Radiation UV? Can you get a tan from your radio? What is that sound...is it mechanical energy? IS the radio warm? Heat energy because c is something to do with the sun b is mechanical ...
Tuesday, April 17, 2007 at 5:26pm by Missy
chemistry
A frost-free refrigerator uses about 640 kWH of electrical energy per year. Express this amount of energy in J: kJ: Cal:
Sunday, October 19, 2008 at 10:23pm by Lilit***
Science & Art - Gr 12
visible electrical energy? One might offer rational explanations of the supernatural, but I wonder who would listen closely. I think you might be thinking of something symbolic of electrical energy, such as a plasma arc, you know those glass balls at the odd gift shops who ...
Saturday, September 13, 2008 at 4:37pm by bobpursley
physics
a new brand of solar panel generates 500 watts of electrical energy. how much energy would it produce after 24 years."
Wednesday, October 31, 2012 at 5:54pm by Alex Reynolds
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 ...
Thursday, March 12, 2009 at 10:23pm by physics
Science
How does a light bulb transform electrical energy into radiant energy? The metal filament is heated hot so the the outer electrons on the atoms become exited to higher unstable energy levels, and as they come back to natural levels, light is emitted. THANK YOU SO MUCH!!!
Wednesday, November 15, 2006 at 6:15pm by Help!
7th Grade science
a new brand of solar panel generates 500 watts of electrical energy. how much energy would it produce after 24 years."
Wednesday, January 18, 2012 at 8:58pm by Anonymous
physics
A resistor with 780 is connected to the plates of a charged capacitor with capacitance 4.32 . Just before the connection is made, the charge on the capacitor is 7.80 1)What is the energy initially stored in the capacitor? 2)What is the electrical power dissipated in the ...
Monday, April 22, 2013 at 9:06am by samya
science 9th
The toasters with which I am familiar use electrical energy to toast toast, not chemical energy.
Wednesday, October 29, 2008 at 9:40pm by DrBob222
Science
Which part of an electric circuit resists the flow of charge when it changes electrical energy into other forms of energy? A. battery B. copper wires C. switch D. light bulb
Tuesday, March 26, 2013 at 5:44pm by bubbie
Physics
When a positive charge moves in the direction of the electric field, what happens to the electrical potential energy associated with the charge? It increases. It decreases. It remains the same. It sharply increases, and then decreases. A How is a motor's mechanical energy ...
Tuesday, January 3, 2012 at 6:46pm by Anonymous
physics
please check these: Which interaction of nature binds atoms and molecules by attracting unlike charges and repulsing like charges? a. strong b. weak c. electromagnetic d. gravitational i got A, but someone said C , so i just want to make sure How is a motor's mechanical ...
Saturday, March 14, 2009 at 10:57am by physics
scientist
Solar cells convert what type of energy into electrical energy? chemical electromagnetic nuclear thermal Can someone plaese help I believe thermal
Monday, April 9, 2012 at 9:37pm by kevin
Science ENGR
Consider a laser which emits photons with a wavelength of 1.55 micrometers. The laser has a lower electron level Ei and an upper electron level Eu. A power supply pours electrons into the upper energy level and these electrons fall down in a time T= 0.1 nanosecond to the lower...
Sunday, November 19, 2006 at 5:40pm by Pam
physics
Electric power is found by multiplying ___ by current. volts? potential difference? The kilowatt hour is a unit for measuring ___. energy or electrical energy Thanks
Monday, May 2, 2011 at 10:13pm by Sushmitha
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...
Monday, December 3, 2007 at 12:32pm by Adam
physics
"voltage energy" and "current energy" are meaningless concepts. A cell converts chemical energy to electrical work. The work is done in some external device, such as a motor, not in the battery/cell itself. There is some heat produced in the cell, but not ...
Thursday, March 13, 2008 at 12:16pm by drwls
physics
A satellite circling the earth has an average power consumption of 370.0 W. Assuming 5.4% efficiency for conversion of solar energy to electrical energy, what area is required for the solar panels?
Wednesday, March 16, 2011 at 2:29am by lyla
Physics
I don't quite understand the grammar of your question. The downstream average velocity of the wind is reduced by the presence of windmmills, if that it what you mean. That is becasue the air must lose kinetic energy to produce useful electrical energy.
Sunday, November 18, 2007 at 12:38am by drwls
Physics
A special kind of light bulb emits monochromatic light of wavelength 630 nm. Electrical energy supplied to it at the rate of 60W, and the bulb is 93% efficient at converting that energy into light energy. How many photons are emitted by the bulb during its life time of 730h?
Friday, March 18, 2011 at 4:17pm by Vanda
electrical
heat. electrical http://tonto.eia.doe.gov/kids/energy.cfm?page=about_forms_of_energy-basics
Saturday, October 31, 2009 at 10:44pm by DrBob222
Science
Measure a suitable mass of liquid in say a Styrofoam cup (let's say 100 g). Place thermometer in cup along with heating coil. Be sure that resistance heater does not touch the sides of cup or the thermometer. Have ammeter in series with the resistance heater and voltmeter ...
Friday, April 19, 2013 at 9:54am by Katerina
Physics
An immersion heater of resistance R converts electrical energy into thermal energy that is transferred to the liquid in which the heater is immersed. If the current in the heater is I, the thermal energy transferred to the liquid in time t is ? The answer is I^2RT, but I don&#...
Saturday, February 19, 2011 at 8:17pm by Amanda S.
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 ...
Thursday, January 19, 2012 at 3:08pm by Cookie
Science
Electrical Energy
Thursday, April 12, 2012 at 8:58pm by Rishad Alam
Physics - electricity
An incandescent lamp is marked '120v,75W' a)what is the current in the lamp under normal condition of operation? b)How much does it cost per hour to operate the lamp if the price of electrical energy is $6.00 per unit? Please stop posting under different names. Use ...
Tuesday, April 17, 2007 at 10:42am by Charles
Physical Science
Which part of an electric circuit resists the flow of charge when it changes electrical energy into other forms of energy? A. battery B. copper wires C. switch D. light bulb i've posted this before but it's getting buried. i dont think its A or B.
Tuesday, March 26, 2013 at 6:06pm by bubbie
5TH GRADE SCIENCE
what is electrical energy
Thursday, October 16, 2008 at 8:43pm by luis
science
in a hydroelectric plant the energy is electrical
Wednesday, September 30, 2009 at 9:05pm by Anna
Science
Heat flows from hot to cold. Objects attract each other, called gravitaional force. Opposite electrical charges attract, like charges repel. A electrical current creates a magnetic field. A changing magnetic field can induce a current in a wire. Mass and energy are equivalent...
Thursday, September 18, 2008 at 9:11pm by bobpursley
physics
please check: A battery converts what type of energy into electrical energy? a. mechanical b. nuclear c. solar d. chemical D When a parallel-plate capacitor is connected to a battery:a____ is stored on one plate, and a ___ is stored on the other a. negative charge, positive ...
Saturday, March 14, 2009 at 9:05pm by physics
Physics
Nuts to your I know paragraph. This has nothing to do with water heating. It has to do with electrical forces and energy. Work= Volts*chargetrnasfered b. 1/2 m v^2= work done by electicity c. Now use the heat you pointed out. Electrical work= heat to heat water+ heat to make ...
Tuesday, January 26, 2010 at 1:56pm by bobpursley
Science
What are 2 things that electrical energy can transform into?
Thursday, March 25, 2010 at 5:14pm by Saiyda
Physics
I think electrical changes to kinetic energy.
Tuesday, March 16, 2010 at 10:24am by AJ
science
In a hydroelectric plant is energy electrical or mechanical
Wednesday, September 30, 2009 at 9:05pm by warren
physics
If the average household uses electrical energy daily at the rate of 500. W, how much U-235 must undergo fission to supply this need for a year? (assume 200. MeV of energy are generated per fission and that the power plant is 46% efficient). 1. Energy used in Joules per year? ...
Tuesday, March 16, 2010 at 9:09pm by sasha
Physical Science
Need help with these questions- 1.What causes an electric current in a wire? A.Electric feilds cause atoms to move in the wire B.Electrons flow because of electrical attraction and repulsion C.Electrons move because of heat D.Electrons build up in the wire and create a charge ...
Monday, May 11, 2009 at 10:41am by mysterychicken
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