What is the physical meaning of the so-called "generator" of infinitesimal canonical transformation? (you may consider rotation or translation.)

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.