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Author Question: What type of particle is a proton? (There may be more than one correct choice.) A) meson B) ... (Read 68 times)

sarasara

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on: Jul 29, 2018
What type of particle is a proton? (There may be more than one correct choice.)
 
  A) meson B) baryon C) nucleon D) lepton E) hadron

Question 2

A lens of focal length 45 mm is mounted on a 35-mm camera. The lens aperture is set at f/2.0 and the shutter speed set at 1/2000 s.
 
  The photographer wants to keep the same exposure (amount of light), but wants to change the f-number to f/8.0 for greater depth of field. What should be the new shutter speed to maintain the same exposure?
  A) 1/4000 s B) 1/8000 s C) 1/500 s D) 1/125 s E) 1/1000 s


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macmac

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B, C, E

Answer to Question 2

D


sarasara

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Reply #2 on: Jul 29, 2018
TY


macmac

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Reply #3 on: Jul 29, 2018
You're welcome


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