Identify the interaction described. ✔ commensalism One species benefits and the other species is neither harmed nor helped. ✔ mutualism Both species benefit. ✔ parasitism One species benefits and the other species is harmed.

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2