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

Author Question: A person is nearsighted with a far point of 75.0 cm. (a) What focal length contact lens is needed ... (Read 60 times)

hbsimmons88

  • Hero Member
  • *****
  • Posts: 526
on: Jul 29, 2018
A person is nearsighted with a far point of 75.0 cm.
  (a) What focal length contact lens is needed to give him normal vision?
  (b) What is the power of the corrective lens?
 
  What will be an ideal response?

Question 2

An ideal transformer steps down 120 V to 12. V and the 2630.-turn secondary supplies 12. A.
 
  (a) Determine the current in the primary.
  (b) Determine the turns ratio.
  (c) What is the ratio of output power to input power?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ksanderson1296

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) -75.0 cm (b) -1.33 diopters

Answer to Question 2

(a) 1.2 A (b) 1.0:10. (c) 1:1 for ideal transformer


hbsimmons88

  • Hero Member
  • *****
  • Posts: 526
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


Ksanderson1296

  • Sr. Member
  • ****
  • Posts: 339
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Elrathia kingii growth series with holaspids ranging from 16.2 mm to 39.8 mm in length Elrathia kingii growth series with holaspids ranging from 16.2 mm to 39.8 mm in length
Two-Point Threshold Device for Measuring Touch Acuity Two-Point Threshold Device for Measuring Touch Acuity
Seriation features operations of comparing the length of each stick to the other sticks and putting ... Seriation features operations of comparing the length of each stick to the other sticks and putting ...
Graph showing how the boiling point of the coolant increases as the percentage of antifreeze in ... Graph showing how the boiling point of the coolant increases as the percentage of antifreeze in ...
Use fingertips to apply friction to muscle attachments along inferior length of the clavicle. Use fingertips to apply friction to muscle attachments along inferior length of the clavicle.
What is the length of the staircase? What is the length of the staircase?
Video: Hormonal regulation of pregnancy - weeks 17 through 38

For a complete list of videos, visit our video library