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

Author Question: A certain fuse blows if the current in it exceeds 1.0 A, at which instant the fuse melts with a ... (Read 234 times)

folubunmi

  • Hero Member
  • *****
  • Posts: 524
on: Jul 29, 2018
A certain fuse blows if the current in it exceeds 1.0 A, at which instant the fuse melts with a current density of 620 A/cm2. What is the diameter of the wire in the fuse?
 
  A) 0.45 mm
  B) 0.63 mm
  C) 0.68 mm
  D) 0.91 mm

Question 2

A 35 mm camera equipped with a 45 mm focal length lens is used to photograph a tree 15 m tall. The aperture of the lens is set at f/2. The aperture diameter at f/2, in mm, is closest to:
 
  A) 23
  B) 14
  C) 18
  D) 27
  E) 32


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bulacsom

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

A


folubunmi

  • Hero Member
  • *****
  • Posts: 524
Reply #2 on: Jul 29, 2018
Thank you!


bulacsom

  • Sr. Member
  • ****
  • Posts: 329
Reply #3 on: Jul 29, 2018
Always glad to help...


« previous next »
 

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

A mini clamp-on digital multimeter can be used to measure alternator output and unwanted AC current ... A mini clamp-on digital multimeter can be used to measure alternator output and unwanted AC current ...
When the exhaust is lean, the PCM applies a positive current into the pump cell. When the exhaust is lean, the PCM applies a positive current into the pump cell.
Hookup for testing fuel-pump current draw on any vehicle equipped with a fuel-pump relay. Hookup for testing fuel-pump current draw on any vehicle equipped with a fuel-pump relay.
Write the equation for the population y at any instant Write the equation for the population y at any instant
A current model for protein secretion by prokaryotes A current model for protein secretion by prokaryotes
What is the current flowing through the resistor? What is the current flowing through the resistor?
Video: Inflammation Animation

For a complete list of videos, visit our video library