The drawing shows four situations in which a positively charged particle is moving with a velocity v through a magnetic field b. in each case, the magnetic field is directed out of the screen toward you, and the velocity is directed to the right. in only one of these drawings is the magnetic force f physically reasonable. which one is it?

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

When zhang qin went to explore west, he brought back stories of

In writing about her findings in a brazilian shantytown, nancy scheper-hughes’s account of alto do cruzeiro provides a window into the terrible toll of nonconsensual organ harvesting among the poor, as well as how she herself changed over time. how might an anthropologist justify the publication of this ethnographic research when considering the problem of ethnographic authority? a. all of the poor must be given an equal voice, thus polyvocality is justification. b. anthropologists are themselves changed in fieldwork, and so honest reflexivity is justification. c. the horrific conditions made it impossible to ignore, and since she obtained informed consent, this is justification. d. authoritative writing asks us to consider what right we have to report, thus a moral challenge is justification.