A train covers 60 miles between 2 p.m. and 4 p.m. How fast was it going at 3 p.m.?
A train covers 60 miles between 2 p.m. and 4 p.m. How fast was it going at 3 p.m.?

In viewing through a magnifying glass, one usually positions one's eyes very close to the lens. Does angular magnification change if the eye is moved back?
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Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago