Author Question: John is nearsighted and cannot see things beyond 110 cm from his eyes. What is the focal length of ... (Read 66 times)

misspop

  • Hero Member
  • *****
  • Posts: 540
John is nearsighted and cannot see things beyond 110 cm from his eyes. What is the focal length of the contact lenses that will enable him to see distant objects clearly?
 
  A) +50 cm
  B) -50 cm
  C) -110 cm
  D) +110 cm
  E) -30 cm

Question 2

By scattering alpha particles from gold, Rutherford showed the atomic nucleus to be very
 
  A) small relative to the atom.
  B) massive relative to the mass of an electron.
  C) both of these
  D) neither of these



Liamb2179

  • Sr. Member
  • ****
  • Posts: 365
Answer to Question 1

C

Answer to Question 2

Answer: C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

For a complete list of videos, visit our video library