why does a cycle stop when we stop paddling or why does it move on paddling?
why does a cycle stop when we stop paddling or why does it move on paddling?

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

Last Activity: 3 Years ago