div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader042vdocumentsmxreader042viewer20220307145afddd417f8b9a944d8e0c65html5page1jpg target=_blank img data-url=best-mobiles-have-parts-that-are-balanced-and-move-freely-if-the-parts-arent-balancedhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: sciencenetlinkscomsciencenetlinkscommediafiler20110927tf-snl-balancing-pointspdfThe best mobiles have parts that are balanced and move freely If the parts arent balanced loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsmxreader042viewer20220307145afddd417f8b9a944d8e0c65html5thumbnails1jpg width=140 height=200 adivdiv