{"id":32,"date":"2015-02-27T01:22:39","date_gmt":"2015-02-27T01:22:39","guid":{"rendered":"http:\/\/justsilence.com\/wordpress\/?p=32"},"modified":"2015-04-09T16:31:17","modified_gmt":"2015-04-09T16:31:17","slug":"hr-23-5-charge-is-quantized","status":"publish","type":"post","link":"https:\/\/justsilence.com\/wordpress\/?p=32","title":{"rendered":"HR 23.5 Charge is Quantized"},"content":{"rendered":"<p>Charge is quantized. The elementary charge has the value:<\/p>\n<p>e = 1.60&#215;10<sup>-19<\/sup>C<\/p>\n<p>SP2. A penny, being electrically neutral, contains equal amounts of positive and negative charge. What is the magnitude of these equal charges?<\/p>\n<hr \/>\n<p>M<sub>penny<\/sub> = 3.1g<\/p>\n<p>Atomic mass of copper = 63.546 amu<\/p>\n<p>Atomic number of copper = 29<\/p>\n<p>1 amu = 1.66&#215;10<sup>-24<\/sup>g<\/p>\n<ul>\n<li>Find number of Cu atoms in 3.1g\n<ul>\n<li>3.1g \/ (63.546 amu * 1.66&#215;10<sup>-24<\/sup>g) = 2.94&#215;10<sup>22<\/sup><\/li>\n<\/ul>\n<\/li>\n<li>Find number of protons (or electrons)\n<ul>\n<li>2.94&#215;10<sup>22<\/sup> x 29 = 8.522&#215;10<sup>23<\/sup><\/li>\n<\/ul>\n<\/li>\n<li>Find charge of protons (or electrons)\n<ul>\n<li>522&#215;10<sup>23<\/sup> * 1.60&#215;10<sup>-19<\/sup>C =136,358.9C<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Answer is ~136,000C<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Charge is quantized. The elementary charge has the value: e = 1.60&#215;10-19C SP2. A penny, being electrically neutral, contains equal amounts of positive and negative charge. What is the magnitude of these equal charges? Mpenny = 3.1g Atomic mass of copper = 63.546 amu Atomic number of copper = 29 1 amu = 1.66&#215;10-24g Find number of Cu atoms in 3.1g 3.1g \/ (63.546 amu * 1.66&#215;10-24g) = 2.94&#215;1022 Find number of protons (or electrons) 2.94&#215;1022 x 29 = 8.522&#215;1023 Find charge of protons (or electrons) 522&#215;1023 * 1.60&#215;10-19C =136,358.9C Answer is ~136,000C<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[5,4],"class_list":["post-32","post","type-post","status-publish","format-standard","hentry","category-physics","tag-hr","tag-physics"],"_links":{"self":[{"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/32","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=32"}],"version-history":[{"count":10,"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/32\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/32\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=32"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=32"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/justsilence.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=32"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}