Which of the following can enter and exit an open system? A. Matter but not energy
B. energy but not matter
C. Matter and energy
D. Neither energy nor matter

Which device uses ac current to operate?

What is the relationship between the direction of motion of the balloon and the wind currents

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is