To develop muscle tone, a woman lifts a 2.50 kg weight held in her hand. she uses her biceps muscle to flex the lower arm through an angle of 60.0°.what is the angular acceleration (in rad/s2) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg · m2, and the net force she exerts is 550 n at an effective perpendicular lever arm of 2.10 cm? (ignore gravity)how much work (in j) does she do?

The sun's gravitational pull is weaker on the planets that are closer to it, i think.

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.