{"event_info":{"picture":"https://img.loigiaihay.com/picture/event/2018/1106/45p-c8-0.jpg","title":"Đề kiểm tra 45 phút (1 tiết) – Chương 8 – Vật lí 12","display_type":1,"cat_id":63,"cat_title":"SGK Vật lí lớp 12","alias":"de-kiem-tra-45-phut-1-tiet-chuong-8-vat-li-12-co-ban","introtext":"","content_box_above":"","type":"event","page_builder":"","item_id":10010,"item_type":2},"list_articles":[{"article_id":46715,"cat_id":63,"publish_time":1541477820,"type_ex":2,"is_hot":0,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2018/1106/resize_de-so-1-45p-c8-0.jpg","title":"Đề kiểm tra 45 phút (1 tiết) – Đề số 1 - Chương 8 – Vật lí 12","label":"","alias":"de-kiem-tra-45-phut-1-tiet-de-so-1-chuong-8-vat-li-12-co-ban","introtext":"Đáp án và lời giải chi tiết Đề kiểm tra 45 phút (1 tiết) – Đề số 1 - Chương 8 – Vật lí 12","display_type":1,"article_type":1,"content":"<style>\r\n.method-close-icon{position: relative;float: right;top: 6px;transform: rotate(270deg);-ms-transform:rotate(270deg);-moz-transform:rotate(270deg);-webkit-transform:rotate(270deg);-o-transform:rotate(270deg);}\r\n.method-open-icon{position: relative;float: right;top: 6px;}\r\n</style>\r\n<p><strong style=\"font-size: 16px;\">Lời giải chi tiết</strong></p><p style=\"text-align: justify;\"><strong>Đáp án</strong></p>\r\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\r\n<tbody>\r\n<tr>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>1.A</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>2.B</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>3.C</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>4.B</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>5.D</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>6.A</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>7.C</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>8.C</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>9.A</strong></p>\r\n</td>\r\n</tr>\r\n<tr>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>10.A</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>11.B</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>12.C</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>13.A</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>14.D</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>15.A</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>16.B</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>17.C</strong></p>\r\n</td>\r\n<td valign=\"top\" width=\"71\">\r\n<p><strong>18.A</strong></p>\r\n</td>\r\n</tr>\r\n</tbody>\r\n</table>\r\n<p style=\"text-align: justify;\"><strong>Giải chi tiết </strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 1: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 2: B</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 3: C</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 4: B</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 5: D</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 6: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 7: C</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 8: C</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 9: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 10: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 11: B</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 12: C</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 13: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 14: D</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 15: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 16: B</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 17: C</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 18: A</strong></p>\r\n<p style=\"text-align: justify;\"><strong>Câu 19:</strong></p>\r\n<p style=\"text-align: justify;\">Ta có:</p>\r\n<p style=\"text-align: justify;\">\\(\\begin{array}{l}\\dfrac{{\\Delta \\lambda }}{\\lambda } = \\dfrac{v}{c} = 0,16\\\\ \\Rightarrow v = 0,16c = 0,{16.3.10^8} = 4,{8.10^7}m/s\\\\v = 48000km/s\\end{array}\\)</p>\r\n<p style=\"text-align: justify;\"><strong>Câu 20:</strong></p>\r\n<p style=\"text-align: justify;\">a) Lực hấp dẫn được tính theo công thức: \\(F = G\\dfrac{{{m_D}.{m_T}}}{{{r^2}}}\\)</p>\r\n<p style=\"text-align: justify;\">\\({m_D} = 5,{98.10^{24}}kg;\\)</p>\r\n<p style=\"text-align: justify;\">\\({m_T} = 1,{99.10^{30}}kg;\\)</p>\r\n<p style=\"text-align: justify;\">\\(r = {15.10^{10}}m\\)</p>\r\n<p style=\"text-align: justify;\">\\(G = 6,{67.10^{ - 11}}N{m^2}/kg;\\)  tính ra ta được \\(v=29,85 \\,km/s.\\)</p>\r\n<p style=\"text-align: right;\"><strong>Loigiaihay.com</strong></p>"}],"most_views":[{"article_id":46715,"cat_id":63,"publish_time":1541477820,"is_hot":0,"is_link":0,"thumbnail":"https://img.loigiaihay.com/picture/article/2018/1106/resize_de-so-1-45p-c8-0.jpg","title":"Đề kiểm tra 45 phút (1 tiết) – Đề số 1 - Chương 8 – Vật lí 12","alias":"de-kiem-tra-45-phut-1-tiet-de-so-1-chuong-8-vat-li-12-co-ban","introtext":"Đáp án và lời giải chi tiết Đề kiểm tra 45 phút (1 tiết) – Đề số 1 - Chương 8 – Vật lí 12","display_type":1}],"list_sub_event":[],"top_banner":"","cfg_info":{"last_cfg_time":"1521866679","ad.popup_frequency":"0","ad.adsense.detail_bottom.unit_id":"ca-app-pub-8529835372050931/9927553003","ad.adsense.popup.unit_id":"ca-app-pub-8529835372050931/2161779402","current.force.update.version":"181","support.email":"loigiaihay.com@gmail.com","support.fanpage":"https://www.facebook.com/Loigiaihay/","popup_rating_after":"86400","admob.app_id":"ca-app-pub-8529835372050931~4358271409","admob.unit.article_detail_bottom":"ca-app-pub-8529835372050931/1883637630","admob.unit.article_detail_top":"ca-app-pub-8529835372050931/8604898230","admob.unit.event_article_top":"ca-app-pub-8529835372050931/7406887709","admob.unit.interestial":"ca-app-pub-8529835372050931/2741937409","ios_appstore_link":"https://itunes.apple.com/us/app/loigiaihay/id1209891610?mt=8","android_appstore_link":"https://play.google.com/store/apps/details?id=com.tp.loigiaihay","min_version":"2.1.3","latest_version":"1.3.9","force_update":false},"popup_ads":[]}