Which scenario best describes an object with a displacement of zero? a. a train moves uphill as it travels in a straight path. b. a person walks 2 miles north and 2 miles west. c. a ball rolls from the top to the bottom of a hill. d. a race car starts and ends at the same point on a track.

Astructure that is found in a plant cell and not in an animal cell is a ? central vacuole mitochondrion nucleus ribosome

Football players often sustain lateral blows to the extended knee. which of the ligaments is (are) damaged as a result? a. suprapatellar b. oblique popliteal and extracapsular ligament c. medial collateral, medial meniscus, and anterior cruciate d. arcuate popliteal and the posterior cruciate

20 the compound al(nh3)2 has atoms of nitrogen.