Interactions among the solid earth, the oceans, the atmosphere, and living things a. are not affected by human activities. b. have resulted in the ongoing development of a changing earth system. c. have resulted in an earth system that has not changed over time. d. have no effect on human activities.

Study the diagram showing the range of temperature in the earth’s layers. which temperature most likely corresponds to the asthenosphere? 1,613°c 2,521°c 3,628°c 6,217°c

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?