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 253 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?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Thermoscan instant thermometer Thermoscan instant thermometer
To clear an obstructed airway in an infant (A) use chest thrusts followed by (B) back blows. To clear an obstructed airway in an infant (A) use chest thrusts followed by (B) back blows.
To reverse the direction of operation, the polarity of the current through the motor is reversed. To reverse the direction of operation, the polarity of the current through the motor is reversed.
The first step in the reprogramming procedure is to determine the current software installed using a ... The first step in the reprogramming procedure is to determine the current software installed using a ...
North Atlantic Current North Atlantic Current
The figure shows an LR circuit with a switch and a 240-volt battery. At the instant the switch ... The figure shows an LR circuit with a switch and a 240-volt battery. At the instant the switch ...
Video: Forming urine ( influencing factors), Forming dilute urine & Forming concentrated urine

For a complete list of videos, visit our video library