amorphous silica, sio2, has a density of about 2.2 g/cm3, whereas the density of crystalline quartz, another form of sio2, is 2.65 g/cm3 . which of the following statements is the best explanation for the difference in density?

All of the following are free tools to you prepare for the sat except

Alex is the head photographer for the yearbook and the newspaper. she has a large staff of assistant photographers because they need to take pictures at all of the school events. she knows that some of her photographers have better cameras and can take action shots at sporting events, and that some of them are good at taking candid pictures in the hallways. she sets firm deadlines so she has enough time to look through all of the shots and choose the best ones. she gives her photographers constructive feedback to them improve their pictures. respectful enforcer warlord doormat peacemaker

Analyze the forces acting on a cyclist who is slowing down as he or she climbs a hill