.In Study l-. the paper sample'.heated in an, atmosphere containing .21% 0 had lost approximately wbat per- . cent of.. its nsInal.aSs .by, the time .the teitisierature . reacbed 350°C ? Yes Yes th47A .49 GO ON TO TtIE NEXT PAGE. 40000000004 Passage Vll Students studied .:the trajectories of a baseball launched under a variety of.conditioDS. In additioll. every O. S ,sec. after launch,. the. transceiver emitted a radar putse, part of which was.r¢flected .back to the transceiver by.the ball. .TtLe.roiind¥tsip travel time.of , . . each pulse was. recorded." and then used to",deterniine. tts¢" distance., D, between.the.transc¢iv¢r and 4be"ball.-(see., Figure 3). ball Study I On a flat plain during a windless. day,.studtiits launched a baseball using the launcher shown in Figure I". launcher ball Figure 3 camera launcher horizontal plane . Using D and e. the studènts found die ball's height. .H, and distauc< R, at the end of ¢ach 0."5"sec interval. H. was plot- ted versus .R. and a smooth curve was. fitted to the data points. transceiver
