1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sidana [21]
4 years ago
13

A potential difference of 1.47 V will be applied to a 22.6 m length of 18-gauge copper wire (diameter = 0.0400 in.). Calculate (

a) the current, (b) the magnitude of the current density, (c) the magnitude of the electric field within the wire, and (d) the rate at which thermal energy will appear in the wire.
Physics
1 answer:
allochka39001 [22]4 years ago
3 0

Voltage = 1.47\\L= 22.6m

r=\frac{d}{2} = \frac{0.04in}{2} = 0.02in = 0.508mm = 0.508*10^{-3}m

So we can now calculate the area of the wire

A= \pi *r^2 = \pi (0.508*10^{-3})^2 = 8.107*10^{-7}m^2

We need also the resistivity specific of cupper, that is:

p_{cupper}=1,72*10^{-8}

a) We have to calculate the current that is given by,

R=\frac{pL}{A}\\R=\frac{(1.72*10^{8})(22.6)}{(8.107*10^{-7})}\\R=0.4\Omega

b)I=\frac{V}{R}

I=\frac{1.47}{0.4} = 3.675A

c) current density

j= \frac{I}{A}\\j= \frac{3.675}{8.107*10^{-7}}\\j= 4.533*10^5 A/m^2

d) Rate of thermal energy

\alpha = I^2*R\\\alpha = 3.675^2*0.4 = 5.4W

You might be interested in
A box with weight of magnitude F_G = 2.00 N is lowered by a rope down a smooth plane that is inclined at an angle φ = 30.0 degre
nexus9112 [7]

Answer:

1.8 J

Explanation:

I had this exact question today and found someone who had solved it before, this was their response to the work done by gravity. They used the name "physicsmom"

Vertical distance = 1.8 sin 30 = .9 m

W = 2 N * .9 m = 1.8J

Good luck! I hope this helps!

5 0
3 years ago
Thanks + BRAINLIST <br><br> Please need correct answer asappp
garik1379 [7]
(A) Standing waves are created by two identical waves reflecting off each other

(B) a general definition of a wave interference is, when more than on wave meet and interact in the same medium

Hope this helps :)
3 0
3 years ago
Read 2 more answers
which two tools below would be the most useful in testing how the mass of an object can affect the distance it moves after being
Mariulka [41]
It would be best to list the answer choice

3 0
4 years ago
What crop is least likely to do well when the temperatures are very hot?
torisob [31]

a. Sweet corn and possibly d. okra.

3 0
4 years ago
The range of human hearing is roughly from twenty hertz to twentykilohertz. Based on these limits and a value of 305 m/s for the
AnnyKZ [126]

Answer:

1.L_s=0.0076\ m

2.L_l=7.62\ m

Explanation:

Given that

f₁= 20 Hz

f₂= 20 KHz

C= 305 m/s

For open pie organ :

L=\dfrac{C}{2f}

<u>Shortest length :</u><u> </u>

L_s=\dfrac{C}{2f_2}

L_s=\dfrac{305}{2\times 20000}

L_s=0.0076\ m

<u>Longest length : </u>

L_l=\dfrac{C}{2f_1}

L_l=\dfrac{305}{2\times 20}

L_l=7.62\ m

7 0
3 years ago
Other questions:
  • Suppose Galileo and his assistant were 1 km apart when Galileo uncovered his lantern to try to measure the speed of light. How l
    12·1 answer
  • When temperature decreases but actual water vapor content remains the same, what happens to relative humidity?
    15·2 answers
  • Suppose a star is 500 light- years away from earth is moved to be 600 light - years away. Which statement is correct?
    7·2 answers
  • Your boss tells you that she needs a decision by the end of the day about the machine you want to purchase for your new operatio
    7·1 answer
  • A slender rod is 90.0 cm long and has mass 0.120 kg. A small 0.0200 kg sphere is welded to one end of the rod, and a small 0.070
    5·1 answer
  • Why might there be a slight downslope in in the total energy instead of a flat constant?
    15·1 answer
  • a 85 Kg girl, running 1.5 m/s, runs for 2550 seconds. How much force is required to stop her in 5 seconds
    13·1 answer
  • Assume we have a tower of 24 disks to move, and each move (moving one disk from one peg to another) takes one minute. The total
    15·1 answer
  • HElP ME PLEASE I AM DESPERATE!!!!!!
    9·2 answers
  • When one member of a binary star system is a black hole, and astronomers detect flickering x-rays coming from the system, where
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!