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December 4, 2016

# Search: How much would you have to raise the temperature of a copper wire (originally at 20&deg;C) to increase its resistance by 17 percent?

Number of results: 149,177

College Physics
How much would you have to raise the temperature of a copper wire (originally at 20 ∘ C) to increase its resistance by 30% ?
September 17, 2013 by TaNay

Physics
I'm trying to determine the specific heat of copper by experiment and I have a question about the change in temperature of the copper. If I take the copper out of boiling water at 100 deg. C and place it in water at 10 degrees C, the temp. of the water increases to 14 deg. Is ...
May 7, 2009 by Brigid

physics
To what temperature must you raise a copper wire, originally at 20.0°C, to double its resistance, neglecting any changes in dimensions? (Does this happen in household wiring under ordinary circumstances?)
September 13, 2014 by Jane

physics
To what temperature must you raise a copper wire, originally at 20.0°C, to double its resistance, neglecting any changes in dimensions? (Does this happen in household wiring under ordinary circumstances?)
September 14, 2014 by Linda

Physics
A copper wire has a resistance of 24 Ω at 20°C. An aluminum wire has three times the length and twice the radius of the copper wire. The resistivity of copper is 0.6 times that of aluminum. Both Al and Cu have temperature coefficients of resistivity of 0.004°C–1. What...
November 17, 2010 by Trace

physics
A copper wire has a resistance of 0.425 at 20.0°C, and an iron wire has a resistance of 0.455 at the same temperature. At what temperature are their resistances equal?
September 15, 2013 by Justin

Physics
Two cylindrical copper wires have the same mass and are at the same temperature. Wire A is twice as long as wire B. The resistance of wire A is related to that of wire B by : a) RA = RB/4 b) RA = RB/2 c) RA = RB d) RA = 2RB e) RA = 4RB
September 24, 2014 by Anonymous

Physics
Two cylindrical copper wires have the same mass and are at the same temperature. Wire A is twice as long as wire B. The resistance of wire A is related to that of wire B by a) RA = RB/4 b) RA = RB/2 c) RA = RB d) RA = 2RB e) RA = 4RB
September 24, 2014 by Anonymous

physics
Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the two wires compare? CHECK ALL THAT APPLY Wire A and wire B have the same resistance. Wire A has twice the resistivity of wire B. Wire...
February 7, 2014 by Anonymous

physics
A silver wire has resistance of 2.1ohms at 27.8 degree celsius and resistance of 2.8ohms at 98 degree celsius. Determine the temperature coefficient of resistance of silver wire and its resistance at zero deg.
March 16, 2010 by Edwin

Physics
Two wires with the same resistance have the same diameter but different lengths. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1.7 × 10-5Ω·m and the...
October 15, 2010 by Max

physics
By what factor is the resistance of a copper wire changed when its temperature is increased from 20¢ªC to 120¢ªC? (the temperature coefficient of resistivity for copper = 3.9 ¢¥ 10‑3/C¢ª)
February 7, 2011 by Anonymous

physics
Suppose that you wish to fabricate a uniform wire out of 0.900 g of copper. Assume the wire has a resistance R = 0.500 , and all of the copper is used. (a) What will be the length of the wire? (m) (b) What will be the diameter of the wire? (µm)
September 17, 2010 by lynette

physics
A wire has a resistance of 27.2 ohms. It is melted down, and from the same volume of metal a new wire is made that is 3 times longer than the original wire. What is the resistance of the new wire? Resistance and length of wire are proportional, but what I am unsure of is if ...
July 25, 2012 by Lauren

Roper
You've made the finals of the Science Olympics! As one of your tasks, you're given 1.1 g of copper and asked to make a wire, using all the metal, with a resistance of 2.0 (ohms). Copper has a density of 8900 kg/m^3. What length will you choose for your wire? What diameter will...
March 24, 2011 by Daniela

Physics
Suppose that you wish to fabricate a uniform wire out of 1 g of copper. (Resistivity = 1.72*10^-8 Ohm-m, density = 8.94*10^3kg/m^3). If the wire is to have a resistance of R = 0.5 ohm and all of the copper is to be used, how long is the wire? a. 1765 m b. 1816 m c. 1.8 m d. 0....
March 1, 2013 by John

Physics
(1) 45 micro coulombs of charge is passed through a wire in 35 seconds. How many electrons does this represent? What is the current in the wire? (2) A piece of copper wire has a resistance of 5 Ohms at 20 degrees celsius. If another piece of copper wire at 0 degrees celsius is...
May 4, 2009 by Bob

Physics
You have a piece of copper with a volume of 2 cm3, and wish to form a wire having a resistance of 0.15 ƒ¶. How long should the wire be if the resistivity of copper is 1.72 ~ 10-8 ƒ¶. m?
July 15, 2013 by tom

College Physics
A wire P has resistance R. If the wire is stretched and its length is increased by 10%, what would be the percentage change in its resistance? (Assume the density of the wire remains constant) A) - 10% B) 0 % C) 10% D) 20% My thoughts: Since resistance is R = resistivity x ...
November 24, 2011 by Andrew

A metal wire has a resistance of 8.00Ω at a temperature of 20C. If the same wire has a resistance of 8.40Ω at 70C, what is the resistance of this wire in ohms when its temperature is −10C?
November 12, 2013 by manu

physics
The resistance of a coil copper wire at 20 degree celsius is 2.21 ohms. After a current of 10 amperes has been flowing in wire for two hours, the resistance of the coil was found o be 2.59 ohms. What is the temperature rise?
October 9, 2014 by jun

physics
A certain copper wire has a resistance of 12.0 \Omega.At what point along its length must the wire be cut so that the resistance of one piece is 5.0 times the resistance of the other?
September 23, 2010 by rabiya

Physics resistance question
A piece of copper wire of resistance R is cut into 10 equal lengths. These parts are connected in parallel. How does the joint resistance of the parallel combination compare with the original resistance of the single wire?
February 21, 2012 by Anonymous

Chemistry
In order to raise the temperature of 5.0 Kg of water from 20 deg. C to 30 deg. C, a 2.0 kg iron bar is heated and then dropped into the water. What should the starting temperature of the bar be? (Specific heat Fe is 0.22 cal/g-deg.)
February 23, 2010 by Lexie

physics - ohms law
how hot would a copper wire need to be for its resistance to be 2% larger than its value at room temperature (20 Centigrade)?
January 24, 2012 by skills

Physics
By what factor is the resistance of a copper wire changing when its temperature is increased from 20 degrees Celsius to 120 degrees Celsius? The temperature coefficient of resistivity for copper = 3.9 x 10^-3 (C)^-1.
February 5, 2012 by Lindsay

Physics
A length of copper wire is shaped into a single circular loop of circumference 63 cm, similar to that shown in the picture below. A magnetic field of strength 0.50 T is parallel to the normal of the loop. The copper wire has a resistance of 2.5 x 10-2 Ω. The ends of the ...
August 14, 2015 by Andrew

physics
A copper telephone wire has essentially no sag between poles 30 m apart on a winter day when the temperature is −16◦C. How much longer is the wire on a summer day when the temperature is 26 ◦C? Assume that the thermal coefficient of copper is constant ...
January 22, 2015 by joe

physical
Specific Heat. Copper has a specific heat of 0.092 cal/g/deg C. A 75 gram copper mass has been heated to a temperature of 100 degrees C. The copper is placed in thermal contact with 50 grams of water at 25 degrees C. What will be the final equilibrium temperature of the copper...
November 23, 2013 by Anonymous

Physics
Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a resistance of 0.835. What is the resistance of the copper wire? Take the resistivity of copper to be 1.72 x 10-8 Ω·m, and that of aluminum to be 2.82 x 10-8 Ω·m.
June 5, 2013 by Tim

Physics
A nichrome wire of diameter 5mm and length 5m has resistivity of 10^-4 ohm meter. If wire is compressed to double it's diameter. Find the resistance in its new form. Also find the resistance of the wire originally ?
November 20, 2016 by Kartik

Physics
1) Suppose that you wish to fabricate a uniform wire out of 1.15 g of copper. Assume the wire has a resistance R = 0.600 , and all of the copper is used. (a) What will be the length of the wire? m? (b) What will be the diameter of the wire? µm? 2) A rectangular block of ...
October 4, 2010 by Max

Physics
1) Suppose that you wish to fabricate a uniform wire out of 1.15 g of copper. Assume the wire has a resistance R = 0.600 , and all of the copper is used. (a) What will be the length of the wire? m? (b) What will be the diameter of the wire? µm? 2) A rectangular block of ...
October 4, 2010 by Tommy

Physics
You've made the finals of the Science Olympics! As one of your tasks, you're given 1.8g of copper and asked to make a wire, using all the metal, with a resistance of 1.3 Ohm. Copper has a density of 8900 kg/m^3. What length will you choose for your wire(in meters)? What ...
February 17, 2010 by Anthony

Physics repost
I know I have posted this question before but I have tried everything under the sun to no avail. Please help a clueless student!!!! A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, ...
October 11, 2007 by Mary

physics
the resistance of copper wire of length 1m is 0.1 ohm the diameter of the wire is 0.045cm find its specific resistance
March 5, 2013 by amit kumar

Physics
A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m. What is the average ...
October 4, 2007 by Mary

Ap physics b
A piece of copper wire is formed into a single circular loop of radius 11 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.65 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m. What is the average ...
April 6, 2011 by christina

Plz help Physics-bobpursley
Bob, please confirm if I got this right and if not, please help to solve 1)A wire has a resistance of 10 ohm at 20 deg celsius and 13.1 ohm at 100 deg celsius. Obtain a value for its temperature coefficient of resistance. ans I got is this= using Rt = Ro (1 + alpha(T-To)) 13.1...
April 17, 2007 by Charles

Physics
Consider a piece of metal that is at 5 deg C. If it is heated until it has twice the internal energy, its temperature will be. a)556 deg C b)283 deg C c)273 deg C d)278 deg C e)10 deg C
November 19, 2012 by S

A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m. What is the average ...
October 9, 2007 by Mary

Physics
What is the resistance of a 4.00 m length of copper wire having a diameter of 2.00 mm at a temperature of 20 degrees?
May 10, 2011 by Anonymous

Chemistry
Copper has a specific heat of 0.387 J/g·°C. How much energy is required to raise the temperature of 140. g of copper from 17.5°C to 154.0°C?
March 8, 2010 by Megan

Chemistry
Copper has a specific heat of 0.387 J/g·°C. How much energy is required to raise the temperature of 215 g of copper from 47.0°C to 164.0°C?
April 19, 2015 by Anonymous

Chemistry
Copper has a specific heat of 0.387 J/g·°C. How much energy is required to raise the temperature of 460. g of copper from 34.5°C to 232.0°C?
May 6, 2015 by Jared

College Physics II
A steel wire and a copper wire, each of diameter 2.000 mm, are joined end to end. At 48.0°C, each has an unstretched length of 2.000 m. The wires are connected between two fixed supports 4.000 m apart on a tabletop. The steel wire extends from x = −2.000 m to x = 0, the...
September 3, 2013 by Andrew

physics
A copper telephone wire has essentially no sag between poles 34.0 m apart on a winter day when the temperature is −20.0°C. How much longer is the wire on a summer day when the temperature is 32.0°C? (Note: Table 19.1 is available for use in solving this problem.)
December 13, 2014 by anonymous

college physics
A 4m long copper wire has a diameter of 2mm and carries a current of 10A. Determine the ff: a. current density in the wire b. electric field c. potential difference between the ends of the wire d. resistance of the wire
February 25, 2013 by Zell

physics
a metal wire has a resistance of 8 Ohms at a temperature of 20 degrees. if the same wire has a resistance of 8.40 Ohms at 70 degrees. What is the resistance of this wire in Ohms when its temperature is -10 degree celsius
November 13, 2013 by Anton

Physics
What length of #22 B&S gauge copper wire is needed to make a resistance of 500 ohms? This is what I came up with but don't think it is correct. looked up diameter for #22 gauge wire = .643 mm and converted to m 6.46 * 10^-4. Used Eq. A = (pi)(d^2)/4 => A = (pi)(6.43 * 10^-4...
September 7, 2012 by Kevin

physics
Temperatures are often measured with electrical resistance thermometers. Suppose that the resistance of such a resistance thermometer is 177Ω when its temperature is 28.7 °C. The wire is then immersed in a liquid, and the resistance drops to 116Ω. The temperature ...
February 13, 2016 by ted

PHYSICS
A copper wire and an aluminium wire have length's in the ratio 3:2.diameters n the ratio 2:3 AND FORCES APPLIED IN THE RATIO 4:5 find the ratio of increase in length of the two wires.(Y FOR COPPER =1.1*1O^11 N/m^2,Y for aluminum=0.70*10^11 N/m^2). ans: 1)189:110
February 4, 2013 by kalawathi

Chemistry
A 45.0 g piece of copper wire is heated. And the temperature of the wire changes from 21.0 degrees C to 88.0 degrees C. The amount of heat absorbed is 280.6 cal. Find the specific heat of Copper. SHOW your work. Please help! I have no Idea where to start or what to do

physics
The drawing shows a copper wire (negligible resistance) bentinto a circular shape with a radius of 0.48 m. The radial sectionBC is fixed in place, while the copper bar ACsweeps around at an angular speed of 16 rad/s. The bar makeselectrical contact with the wire at all times. ...
March 12, 2012 by Daniel

chemistry
How much heat is needed to raise the temperature of 75 grams of copper from 35„aC to 57„aC? The specific heat of copper is 0.385 J/g „aC.
December 7, 2011 by mario

chemistry
How much heat is needed to raise the temperature of 75 grams of copper from 35„aC to 57„aC? The specific heat of copper is 0.385 J/g „aC.
December 7, 2011 by mario

physics..resistance and all
can someone tell me why when the length of a wire increase, the current decreases?? and why is it that, as the length of the wire increase, so too does the resistance..so y isn't the current the same increasing as the forumla V=IR shows that there is a proportional ...
November 18, 2007 by AllyKat

physics
One mile of copper wire has a resistance of 13 Ω. Using the wire to electrically connect two terminals that are half a mile apart, rank the following situations in order of increasing resistance. I. Use the full length of wire. II. Cut the wire in half and use only one ...
April 16, 2012 by BOBBY

Phys 2
I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
March 16, 2011 by Sonia

Physics
I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
March 16, 2011 by Sonia

physics
A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?
March 20, 2011 by maria

physics
A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?
March 22, 2011 by maria

algebra
A three quarter inch wire has 12 ohms resistance. How much resistance has the same length of half-inch wire, if resistance varies inversely as the square of the diameter?
May 23, 2014 by Don

Physics 212
Two copper wires have equal lengths, but the diameter of one is three times that of the other. a) The resistance of the thinner wire is _____ times that of the thicker wire: (Prove your work) 1) 3 2) 1/3 3) 9 4) 1/4
January 6, 2014 by Marcu

math 156
a worker makes 30000 a year. after 1 year he gets a raise of 5%. the next year he gets a raise of 10%. If he received no raise the first year, what percent increase would give him the same salary as consecutive raises of 5% and 10%? would it be 50%
December 3, 2009 by Rmz

science
Calculate the resistance of a copper wire cross section area 2*10_2 the resistivity of wire is 1.67*10_ohm metre
October 11, 2016 by jyiti Bahuguna

physics
What is the resistance of a 7.4-m length of copper wire 1.2mm in diameter? The resistivity of copper is 1.68×10−8Ω⋅m. R=_________
February 7, 2014 by IM

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
March 16, 2011 by Sonia

physics
A copper wire that has a diameter of 2.9 mm carries a current of 39.0 A. Assuming that each copper atom contributes one free electron to the metal, find the drift velocity of the electrons in the wire. The molar mass of copper is 63.5 g/mol and the density of copper is 8.95 g/...
July 6, 2016 by Joe

Physics
You've made the finals of the Science Olympics! As one of your tasks, you're given 1.1g of copper and asked to make a cylindrical wire, using all the metal, with a resistance of 1.7 Ohm. What length l will you choose for your wire? What diameter d will you choose for your wire?
February 17, 2010 by Anthony

Physics
What is the mass of a copper wire that will give a wire, 0.20mm in diameter, a resistance of 400 ohms can you please show me the formulas
November 25, 2015 by John

physical science
An electric current heats a 225 g copper wire from 20.0 °C to 40.0 °C. How much heat was generated by the electric current? (ccopper = 0.093 cal/gm-deg)
March 16, 2010 by Anonymous

physical science
An electric current heats a 225 g copper wire from 20.0 °C to 40.0 °C. How much heat was generated by the electric current? (ccopper = 0.093 cal/gm-deg)
July 16, 2010 by jerry

chemistry stoichiometry
My chem teacher gave us this problem Twelve-gauge copper wire,like the kind commonly used in residential electrical systems, is roughly cylindrical and has a diameter of approximately .1040in. Copper's density is 8.92g/cubic cm and copper atoms have an approximate atomic ...
September 9, 2007 by Julissa

Chemistry
I have this problem: How much heat energy is required to raise the temperature of 0.365kg of copper from 23.0 ∘C to 60.0 ∘C? The specific heat of copper is 0.0920 cal/(g⋅∘C). I did the equation using formula Heat= mass x change in temperature x specific...
January 29, 2014 by mysterychicken

engineering physics 2
A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv- ity of the wire is 1.7e-8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^-1. Calculate the resistance of the wire at 20degrees Celsius...
February 28, 2008 by David

physics
Two wires have the same cross-sectional area and are joined end to end to form a single wire. The first wire has a temperature coefficient of resistivity of α1 =0.00603 (C°)-1 and a resistivity of 5.00 x 10-7Ω m. For the second, the temperature coefficient is α...

PHYSICS 2
Two wires have the same cross-sectional area and are joined end to end to form a single wire. The first wire has a temperature coefficient of resistivity of α1 =0.00603 (C°)-1 and a resistivity of 5.00 x 10-7Ω m. For the second, the temperature coefficient is α...

science
How much energy is required to raise the temperature of 22.8 g of copper from 30°C to 1250°C?
February 27, 2012 by science

Physics
A copper wire that has been heated to 520 degrees Celsius for pliability is plunnged into 350 mL of water at 18 degrees Celsius. The final temperature of the copper and water bath is 31 degrees Celsius. Find the mass of the copper wire
November 15, 2014 by Michelle

Physics
A copper wire that has been heated to 520 degrees Celsius for pliability is plunged into 350 mL of water at 18 degrees Celsius. The final temperature of the copper and water bath is 31 degrees Celsius. Find the mass of the copper wire
November 15, 2014 by Hemerla

physics
A metal wire has a resistance of 8 ohm at a temperature of 20 degree celcius . If the same wire has a resistance of 8.40 ohm at 70 degree celcius , what is the resistance of this wire in ohms when its temperature is -10 degree celcius ?
November 14, 2013 by rosa

physics
A metal wire has a resistance of 8 ohm at a temperature of 20 degree celcius . If the same wire has a resistance of 8.40 ohm at 70 degree celcius , what is the resistance of this wire in ohms when its temperature is -10 degree celcius ?
November 14, 2013 by rosa

physics
An insulated copper wire is wrapped around an iron nail. The resulting coil of wire consists of 240 turns of wire that cover 1.8 cm of the nail, as shown in the figure . A current of 0.61 A passes through the wire. if the ferromagnetic properties of the nail increase the field...
March 22, 2012 by physics im dying

chemistry
A 55.0-g piece of copper wire is heated, and the temperature of the wire changes from 19 degrees C to 86 degrees C. The amount of heat absorbed is 343 cal. What is the specific heat of copper?
August 4, 2008 by kayla

physics
The specific heat capacity of copper is 0.092 calories per gram per degree Celsius. How much heat is required to raise the temperature of a 5 g piece of copper from 0°C to 80°C?
December 13, 2009 by FALLON

AP Physics
A certain length of wire has a resistance of 21 ohms. This wire is melted down and from the same volume of material a new wire is formed that is three times longer than the original wire. What is the resistance of a new wire? ***PLEASE SHOW ALL WORK!!!
April 12, 2016 by SARAHM

physics
A piece of copper wire has a resistance per unit length of 6.45*10-3 /m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.140 m. The ends of the wire are connected to a 12.0 V battery. Find the magnetic field strength at the center of the coil.
February 11, 2008 by rick

Physics
What is the resistance of a 4.00 m length of copper wire having a diameter of 2.00 mm at a temperature of 20 degrees? R= ? L= 4.00 m resistivity= 1.72 * 10^-8 ohm-meters A= ? A= pi*r^2 change 2 mm to .002m, square it and multiply by 3.14 I got .00001256 Is this right so far?
May 9, 2011 by Anonymous

science
construct a heating curve for a substance that is heated to 150 deg centigrade. The substance is originally solid at 35 deg c, melts at 75 deg c and boils at 126 dec c
February 17, 2016 by vidya

Chemistry
In a laboratory, a student studies the absorption and transmission of light in order to analyze copper in brass and determine its percentage within the brass sample. He determines the amount of light absorbed by a sample by measuring the amount of light transmitted, all at a ...
April 1, 2009 by Jessica

physics
Two wires have the same cross-sectional area and are joined end to end to form a single wire. The first wire has a temperature coefficient of resistivity of α1 =0.00480 (C°)-1 and a resistivity of 4.90 x 10-5Ω m. For the second, the temperature coefficient is α...

PHYSICS
Two wires have the same cross-sectional area and are joined end to end to form a single wire. The first wire has a temperature coefficient of resistivity of α1 =0.00603 (C°)-1 and a resistivity of 5.00 x 10-7Ω m. For the second, the temperature coefficient is α...

Physics
A piece of copper wire has a resistance per unit length of 5.50 x 10^-3 Ω/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.200 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the ...
October 3, 2013 by Anonymous

Two wires have the same cross-sectional area and are joined end to end to form a single wire. The first wire has a temperature coefficient of resistivity of α1 =0.00480 (C°)-1 and a resistivity of 4.90 x 10-5Ω m. For the second, the temperature coefficient is α...
January 22, 2013 by adam h.

Math
If someone could help me with these 6 questions, that would be great, Thank you. :) 5.) Chris wants to buy a cell phone that costs \$215.00. His parents say Chris must raise 35% of the money himself. How much money much Chris raise? A.\$705.00 B.\$75.25 <------I believe it's ...
December 11, 2015 by Todd Thicket

physics
An object is heated and then allowed to cool when the temperature is 70 deg. its rate of cooling is 3 deg, celcius perminute and when the temperature is 60 deg. celcius, the rate of cooling is 2.5 deg. celcius per minute. Determine the temperature of the surroundings
February 28, 2016 by s.k.m

chemistry
If 125cal of heat is applied to a 60.0-g piece of copper at 20.0(Deg C), what will the final temperature be? The specific heat of copper is 0.0920cal/(g.degC)
February 16, 2013 by Anonymous

physics
A copper wire has a circular cross section with a radius of 3.75 mm. If the wire carries a current of 4.00 A, find the drift speed of the electrons in the wire. (Assume the density of charge carriers (electrons) in a copper wire is n = 8.46 *10^28 electrons/m^3.) thanks
March 27, 2011 by Rachel

physics
A copper wire has a circular cross section with a radius of 3.75 mm. If the wire carries a current of 4.00 A, find the drift speed of the electrons in the wire. (Assume the density of charge carriers (electrons) in a copper wire is n = 8.46 *10^28 electrons/m^3.) thanks
March 27, 2011 by Rachel

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