« previous next »

Author Question: The focal lengths of the objective and eyepiece in a compound microscope are 0.8 cm and 2.5 cm, ... (Read 76 times)

kaid0807

  • Hero Member
  • *****
  • Posts: 515
on: Jul 27, 2018
The focal lengths of the objective and eyepiece in a compound microscope are 0.8 cm and 2.5 cm, respectively. The image formed by the objective is 16 cm from it and the final image is 25 cm from the eye. What is the total magnification?
 
  A) -19.0
  B) -11.0
  C) -2.0
  D) -100
  E) -200

Question 2

Consider a bicycle wheel to be a ring of radius 30. cm and mass 1.5 kg. Neglect the mass of the axle and sprocket.
 
  If a force of 20. N is applied tangentially to a sprocket of radius 4.0 cm for 4.0 s, what linear speed does the wheel achieve, assuming it rolls without slipping?


sultana.d

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jul 27, 2018
Answer to Question 1

E

Answer to Question 2

7.11 m/s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

kaid0807

  • Hero Member
  • *****
  • Posts: 515
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


sultana.d

  • Sr. Member
  • ****
  • Posts: 320
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Scorpions, Spiders and Sharks: Electron-Microscope Images Scorpions, Spiders and Sharks: Electron-Microscope Images
Whitefish Blastula Cells under a microscope Whitefish Blastula Cells under a microscope
Using and Cleaning the Microscope Using and Cleaning the Microscope
Electron Microscope Electron Microscope
Electron Microscope Electron Microscope
Video: Mutations and translation

For a complete list of videos, visit our video library