This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A Tungsten w ire is 1.50 m long and has a diameter of 1.00 mm. At 20.C a current of 50. mA flows ... (Read 18 times)

jwb375

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
A Tungsten w ire is 1.50 m long and has a diameter of 1.00 mm. At 20.C a current of 50. mA flows through the wire. =5.6  10-8   m; =0.0045(C)-1
 
  (a) Determine the potential across the wire.
  (b) If the wire temperature increases by 100. C, what potential is now required to produce a current of 50. mA?

Question 2

Which scientist built a radio transmitting tower at the turn of the 20th century and claimed that he was receiving interplanetary communications with it?
 
  A) Guglielmo Marconi
  B) Thomas Edison
  C) Nikola Tesla
  D) Grote Reber


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

atrochim

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 27, 2018
Answer to Question 1

(a) 5.4 mV
(b) 7.8 mV

Answer to Question 2

C


jwb375

  • Member
  • Posts: 540
Reply 2 on: Jul 27, 2018
Excellent

mochi09

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Long-term studies of the Glanville fritillary butterfly, Melitaea cinxia, have provided exceptional Long-term studies of the Glanville fritillary butterfly, Melitaea cinxia, have provided exceptional
Co-current flow in a concentric tube heat exchanger Co-current flow in a concentric tube heat exchanger
A typical engine oil cooler. Engine coolant flows through the cooler adjuster that fits between the ... A typical engine oil cooler. Engine coolant flows through the cooler adjuster that fits between the ...
A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ... A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ...
The Internal Anatomy of a Long Bone The Internal Anatomy of a Long Bone
Video: Bond types - Atomic structure and basis of bonds

For a complete list of videos, visit our video library