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

Author Question: A farsighted boy has a near point at 2.3 m and requires eyeglasses to correct his vision. Corrective ... (Read 96 times)

bobbie

  • Hero Member
  • *****
  • Posts: 592
on: Jul 29, 2018
A farsighted boy has a near point at 2.3 m and requires eyeglasses to correct his vision. Corrective lenses are available in increments in power of 0.25 diopters.
 
  The eyeglasses should have lenses of the lowest power for which the near point is no further than 25 cm. The correct choice of lens power for eyeglasses, in diopters, is: A) +3.75
  B) +3.50
  C) +3.25
  D) +4.00
  E) +4.25

Question 2

Four equal +6.00-C point charges are placed at the corners of a square 2.00 m on each side. (k = 1/40 = 8.99  109 N  m2/C2)
 
  (a) What is the electric potential (relative to infinity) due to these charges at the center of this square?
  (b) What is the magnitude of the electric field due to these charges at the center of the square?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sultansheikh

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

(a) 153 kV (b) zero


bobbie

  • Member
  • Posts: 592
Reply 2 on: Jul 29, 2018
YES! Correct, THANKS for helping me on my review

okolip

  • Member
  • Posts: 362
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Correct position when lifting a heavy object off the floor. Correct position when lifting a heavy object off the floor.
Graph showing the relationship between the freezing point of the coolant and the percentage of ... Graph showing the relationship between the freezing point of the coolant and the percentage of ...
Dew-Point Thresholds Dew-Point Thresholds
Stacking the joints. A. Correct thumb–wrist alignment for applying direct pressure. B. Incorrect ... Stacking the joints. A. Correct thumb–wrist alignment for applying direct pressure. B. Incorrect ...
Decimal Values as They Relate to the Location of the Decimal Point Decimal Values as They Relate to the Location of the Decimal Point
The neural pathway for vision The neural pathway for vision
Video: Knee Animation

For a complete list of videos, visit our video library