« previous next »

Author Question: An insulator has a positive electric charge of 8 10 -17 C. How many electrons were added or ... (Read 54 times)

mmm

  • Hero Member
  • *****
  • Posts: 558
on: Jul 28, 2018
An insulator has a positive electric charge of 8  10 -17 C. How many electrons were added or removed?
 a. 500 electrons removed
  b. 20 electrons removed
  c. 500 electrons added
  d. 20 electrons added

Question 2

A far-sighted student has a near point of 1.0 m. Calculate the focal length (in cm) of the glasses needed so the near point will be normal (25 cm).
 a. 72
  b. 25
  c. 33
  d. 100
  e. 33


CharlieArnold

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Measuring Electrical Charge Measuring Electrical Charge
Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto
Use a DMM set to read DC volts to check the voltage drop of the positive circuit to the fuel ... Use a DMM set to read DC volts to check the voltage drop of the positive circuit to the fuel ...
A latex agglutination test for rheumatoid factor. A positive control at 1. A negative control at 2. ... A latex agglutination test for rheumatoid factor. A positive control at 1. A negative control at 2. ...
Three point charges lie on the x x axis. Charge 1 (+9.9 μC μ C ) is at the origin, ... Three point charges lie on the x x axis. Charge 1 (+9.9 μC μ C ) is at the origin, ...
Added Sugar in Common Foods Added Sugar in Common Foods
Video: Resting membrane potential - electrical polarity and maintenance requirements

For a complete list of videos, visit our video library