The Andean giant hummingbird (Patagona gigas) has mass 70 gg and flaps its wings 10 times per second while hovering. Estimate the amount of work done by such a hummingbird in each wingbeat. g

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

In science and physics what is the standard unit of measure for speed?