How would you describe the amplitude of a wave using the words crest and trough?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Ms.hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?