Thanks! So, let's continue with the D-shaped lenses, if you have a short lense and a tall lense, and the width of the lenses (from the center of flat edge to the center of the curved edge) are equal, the short lens would have a smaller focal length since its relative curvature is higher than the...
I have a similar question, i knew about the curvature, but how does the SIZE of the lens affect the focal length? do smaller (shorter) lenses have shorter focal points than longer lenses?
Homework Statement
A fish in a flat-sided aquarium sees a can of fish food on the counter. To the fish's eye, the can looks to be 49 cm outside the aquarium. What is the actual distance between the can and the aquarium? (You can ignore the thin glass wall of the aquarium.)
Homework...
Homework Statement
The two objects in the figure below are balanced on the pivot, with m = 2.4 kg. What is the distance d?
http://www.webassign.net/knight/p13-27alt.gif
Homework Equations
T=rf
The Attempt at a Solution
2.4kg + 4.0 kg= 6.4kg
6.4kg/2= 3.2kg on each side of...
That's exactly what I'm thinking, but apparently I'm definitely wrong. I went to my TA and showed him my approach and my answer, and he said there's something I'm not accounting for. I have NO idea what he's talking about. Do I add up the tensions on either side of the pulley?
Thanks for the response james, I checked with my TA and apparently I do, in fact, have the WRONG answer. I have no idea what I'm doing wrong, it's really driving me nuts.
Homework Statement
The figure below shows two boxes, m1 and m2. m1 = 10 kg is sitting on a frictionless horizontal surface, while m2 = 7 kg is hanging vertically. The two masses are connected by a massless string that is wrapped around a massless, frictionless pulley.
Figure...