What type of particle is a proton? (There may be more than one ...

[sarasara]

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

[macmac]

Answer to Question 1

B, C, E

Answer to Question 2

D

[sarasara]

TY

[macmac]

You're welcome