An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire with...

Question

Question

An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire with r = 1.68x10-8) and of length 2.7 m (9 ft) is connected to an electric heater which draws 15.0 A on a 120-V line. How much power is dissipated in the cord? Please no hand written answers

science physics

Answer 1

Answer #1

P=IV,

P = IV

R = ρL / A

P = V^2/R

. First I found the power required by the heater. P = (15.0 A)(120 V) P = 1800 W

I wanted to find the power within the cords. R = ρL / A

A==4.16*10^-7*3.14

R=1.68*10^-8(2.7 m) / (4.16 * 10^-7)^2*3.14=

P = V^2 / R=

.

Answer 2

Similar Homework Help Questions

An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and...

An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m is connected to an electric heater which draws 11.0 A on a 120-V line. The resistivity of copper is 1.68×10−8Ω⋅m. How much power is dissipated in the cord? Express your answer to two significant figures and include the appropriate units.
An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and...

An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.3 m is connected to an electric heater which draws 16.5 A on a 120-V line. The resistivity of copper is 1.68×10−8Ω⋅m. Part A How much power is dissipated in the cord? Express your answer to two significant figures and include the appropriate units. P P = nothingnothing SubmitRequest Answer
Phy 1104 <Ch 18 HW Problem 18.42 An extension cord made of two wees of diameter...

Phy 1104 <Ch 18 HW Problem 18.42 An extension cord made of two wees of diameter 0 129 cm (no 16 copper wire) and of length 24 mis connected to an electric heater which draws 120 Aona 120-V in The resistivity of copper is 1 58x10m Part A How much power is dissipated in the cord? Express your answer to two significant figures and include the appropriate units T! A O = ? P Value Units Subm Request Answer <...

A given wire has a resistance of 3.90 Ω per 1000 ft. A 79-ft extension cord...

A given wire has a resistance of 3.90 Ω per 1000 ft. A 79-ft extension cord made of this wire is used simultaneously with an entertainment system that draws 7 A and a toaster that draws 15 A. (An extension cord has two wires in it.) a) If the voltage at the wall socket is a constant 120 V, how much voltage is available at the tools? b) How much power is lost in the extension cord?
A portable electric heater uses 21 A of current. The manufacturer recommends that an extension cord...

A portable electric heater uses 21 A of current. The manufacturer recommends that an extension cord attached to the heater receive no more than 2.1 W of power per meter of length. What is the smallest radius of copper wire that can be used in the extension cord? (Note: An extension cord contains two wires.)
The picture shows a battery connected to two wires in parallel. Both wires are made of...

The picture shows a battery connected to two wires in parallel. Both wires are made of the same material and are of the same length, but the diameter of wire A is twice the diameter of wire B. True or False for the following: 1) The resistance of wire B is four times as large as the resistance of wire A. 2) The power dissipated in wire A is 16 times the power dissipated in wire B. 3) The voltage...

Two wires made of copper and aluminum have the same length and diameter. The wires are...

Two wires made of copper and aluminum have the same length and diameter. The wires are fused together end-to-end to form a single wire. A potential difference is applied to the ends of the wire by a battery so that current flows along the wire. What is the ratio of the electron drift velocity between the two metals, reported as ?
An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long...

An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long copper wire to a 1.8 mm diameter, 60 cm long iron wire at normal room temperature (20 ∘C). When two wires are connected end to end, their resistances add together. The resistivity of copper is 1.68×10−8Ωm and the of iron is 1.00×10−7Ωm. The temperature coefficients are: copper = 0.0039/∘C and iron = 0.0050/∘C. What is the resistance of the copper section of wire?
An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long...

An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long copper wire to a 1.8 mm diameter, 60 cm long iron wire at normal room temperature (20 ∘C). When two wires are connected end to end, their resistances add together. The resistivity of copper is 1.68×10−8Ωm and the of iron is 1.00×10−7Ωm. The temperature coefficients are: copper = 0.0039/∘C and iron = 0.0050/∘C. What is the resistance of the iron section of wire?

Problem 18.87 Copper wire of diameter 0.249 cm is used to connect a set of appliances...

Problem 18.87 Copper wire of diameter 0.249 cm is used to connect a set of appliances at 120 V, which draw 1850 W of power total. The resistivity of copper is 1.68 x 10- 12 m. What power is wasted in 29.0 m of this wire? Express your answer to three significant figures and include the appropriate units. I MÅ BO ? Units P dissipated = Paissipated = | Value Submit Request Answer Part B What is your answer if...