Recent content by Seadragon

I'm confused as to why you would run that particular test.

Hello, I am faced with a perplexing challenge in analyzing my results for an ecology experiment. All help is immensely appreciated. The situation: I have 6-month longitudinal mass data for 8 hummingbirds. From eye-balling the data, time definitely has an effect: masses tend to decrease...

LOL darn... I appears I'm just another one of those failures. =P I posted on there already ;-) anybody know a more frequented one than this?

Hello, As part of a research project I'm going to have to run some relatively (for me) advanced stats. Anybody know of a forum where I can post my stats questions? Thanks! Michael

Homework Statement A thin lens has radii of curvature R1=-8.00 cm and R2=-6.00 cm, indices of refraction n(red)=1.50 and n(violet)=1.53 for red and violet light, and is surrounded by air. An object at distance s=20.0 cm from the lens has an image at distance s' from the lens. Is there a second...

A diverging lens has a negative focal length and a virtual image. So f and s' are negative. A converging lens has a positive focal length and a real image. So f and s' are positive. 1/s + 1/s' = 1/f. Let's say s is the independent variable on my graph: For a converging lens: 1/s + 1/s'...

Homework Statement An object is at distance s from a thin glass lens of focal length f. The lens is surrounded by air. The image is at distance s' from the lens. Draw a graph of s' versus s. Explain physically why the graph varies as it does. Homework Equations I think I am...