« previous next »

Author Question: The length of a certain wire is kept same while its radius is doubled. What is the new resistivity ... (Read 83 times)

captainjonesify

  • Hero Member
  • *****
  • Posts: 543
on: Jul 29, 2018
The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?
 
  A) It is increased by a factor of 2.
  B) It is increased by a factor of 4.
  C) It is reduced by a factor of 2.
  D) It is reduced by a factor of 4.
  E) It does not change.

Question 2

Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum destructive interference is to occur at point P, the two beams must travel paths that differ by
 
  A) a whole number of wavelengths.
  B) an odd number of half-wavelengths.
  C) a whole number of half-wavelengths.


BUTTHOL369

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Wire Fox Terrier Wire Fox Terrier
Volvulus. A length of small intestine has twisted around itself, cutting off blood circulation to th Volvulus. A length of small intestine has twisted around itself, cutting off blood circulation to th
Measuring Limb Length Measuring Limb Length
Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada Telomere length is related to the amount of time adults spend in leisure time activity. Source: Ada
Length-Tension Relationship Length-Tension Relationship
What is the length of the staircase? What is the length of the staircase?
Video: Blood Test Basics

For a complete list of videos, visit our video library