Author Question: A nearsighted person cannot see objects beyond 80 cm from his eyes. Which one of the following ... (Read 80 times)

Caiter2013

  • Hero Member
  • *****
  • Posts: 607
A nearsighted person cannot see objects beyond 80 cm from his eyes.
 
  Which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable him to comfortably see the distant objects clearly?
  A) +80 cm, -1.3 diopters
  B) -80 cm, +1.3 diopters
  C) +80 cm, +1.3 diopters
  D) -1.3 cm, +1.3 diopters
  E) -80 cm, -1.3 diopters

Question 2

A 500-N weight sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm2. If the large piston has an area of 40 cm2, how much weight can the large piston support? Assume the pistons each have negligible weight.
 
  A) 25 N
  B) 500 N
  C) 10000 N
  D) 40000 N


onowka

  • Sr. Member
  • ****
  • Posts: 353
Answer to Question 1

E

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

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

For a complete list of videos, visit our video library