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

Author Question: What is the magnitude of a the vertical electric field that will balance the weight of a plastic ... (Read 44 times)

cnetterville

  • Hero Member
  • *****
  • Posts: 547
on: Jul 29, 2018
What is the magnitude of a the vertical electric field that will balance the weight of a plastic sphere of mass that has been charged to -3.0 nC? (k = 1/40 = 9.0  109 N  m2/C2)
 
  A) 6.9  106 N/C
  B) 7.8  105 N/C
  C) 1.5  106 N/C
  D) 2.1  106 N/C

Question 2

A person uses corrective glasses of power -8.5 D that are worn 2.0 cm from her eye.
 
  (a) Is she nearsighted or farsighted?
  (b) What is her far point without glasses?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

trog

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

(a) nearsighted (b) 14 cm


cnetterville

  • Hero Member
  • *****
  • Posts: 547
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


trog

  • Sr. Member
  • ****
  • Posts: 343
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Dead Weight Testers Experiment Dead Weight Testers Experiment
Vertical and Horizontal Changes in Pressure Vertical and Horizontal Changes in Pressure
Plastic Container Expiry Date Plastic Container Expiry Date
Recommended Weight Gain during Pregnancy Recommended Weight Gain during Pregnancy
Magnitude of Geologic Time Magnitude of Geologic Time
Comparing Fluid Balance Comparing Fluid Balance
Video: Negative Feedback Regulation of Blood Pressure

For a complete list of videos, visit our video library