Africa's farmers know best

1.do african farmers need new technology? why or why not?
2.how might scientists better adapt the new hybrids they are developing to the regions where they will be grown?

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Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

In what direction does an applied force move an object

Acold front traveling southeast collided with a warm front traveling northwest the following map shows the weather on monday the day the two fronts collided which of these describes the weather forecast for mississippi on tuesday and wednesday