× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
p
6
I
6
h
5
k
5
a
5
J
5
k
5
r
5
O
5
x
5
d
4
s
4
New Topic  
ppk ppk
wrote...
Valued Member
On Hiatus
Posts: 3561
12 years ago
The focal length of the lens of a simple camera is 40.0 mm. How far must the lens be moved to change the focus of the camera from a person 25 m away to one that is 4.0 m away?
A) 0.2 mm
B) 0.3 mm
C) 0.4 mm
D) 0.5 mm
E) 0.7 mm
Read 2085 times
1 Reply

Related Topics

Replies
wrote...
12 years ago
B
Biology!
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  529 People Browsing
 145 Signed Up Today
Related Images
  
 279
  
 348
  
 298
Your Opinion
What percentage of nature vs. nurture dictates human intelligence?
Votes: 386