{"nbformat":4,"nbformat_minor":0,"metadata":{"colab":{"name":"datation.ipynb","version":"0.3.2","provenance":[],"collapsed_sections":[]},"kernelspec":{"name":"python3","display_name":"Python 3"}},"cells":[{"metadata":{"id":"xdwO2MNyB4LA","colab_type":"text"},"cell_type":"markdown","source":["![datation1](http://eratosthene.com/images/datation2.png)\n","\n"]},{"metadata":{"id":"OAMsc9UdF7CY","colab_type":"text"},"cell_type":"markdown","source":["\n","## **Partie C Python** \n","\n","On note $A_n$ l'activité du carbone 14 par minute et par gramme $n$ siècles après la mort de l'organisme étudié.\n","\n","Ainsi, d'après l'introduction $A_0=13,6$ désintégrations par gramme et par minutes et $(A_n)$ décroit de $1,2 ~\\%$ par siècle.\n","\n","On considère l'algorithme suivant:\n","\n","---\n","\n",">>1\t $~~~~n \\gets 0$\n","\n",">>2\t $~~~~A \\gets 13,6$\n","\n",">>3  $~~~~mesure \\gets 1,44$\n","\n",">>4\t$~~~~$Tant que $A > mesure$ \n","\n",">>5\t$~~~~~~~~~~~n \\gets n + 1$\n","\n",">>6\t $~~~~~~~~~~~A \\gets 0,988 \\times A$\n","\n",">>7\t $~~~~$Fin tant que\n","\n",">>8\t$~~~~$Afficher $n$\n","\n","---\n","\n","\n","1. À quoi correspond la valeur $n$ affichée en sortie de cet algorithme ? \n","\n","\n","\t\n","\n"]},{"metadata":{"id":"AGOf8HqSXl8N","colab_type":"text"},"cell_type":"markdown","source":["**texte en gras** **Répondre ici: ...**"]},{"metadata":{"id":"9WPS4hnAWqik","colab_type":"text"},"cell_type":"markdown","source":["2. Expliquer ci-dessous, la ligne 6 de l'algorithme:"]},{"metadata":{"id":"YzKLSrd3WrVi","colab_type":"text"},"cell_type":"markdown","source":["**Répondre ici: ...**"]},{"metadata":{"id":"jEa_bG6bWpnZ","colab_type":"text"},"cell_type":"markdown","source":["3. Traduire cet algorithme en un programme Python dans la cellule ci-dessous, quel résultat affiche-t-il? "]},{"metadata":{"id":"1umb2zu3DUcM","colab_type":"code","colab":{}},"cell_type":"code","source":["# Programme\n","\n","\n","\n","\n","\n","\n","\n"],"execution_count":0,"outputs":[]},{"metadata":{"id":"9nw-sHUUT6H-","colab_type":"text"},"cell_type":"markdown","source":["4. En 1991, deux randonneurs ont découvert dans les Alpes un corps momifié dans la glace. Sur cette momie baptisée Otzi, on a mesuré une activité du carbone 14 de 7,16 désintégrations par minute et par gramme. Modifier le programme pour obtenir l'âge d'Otzi."]},{"metadata":{"colab_type":"text","id":"thnrO6iT-PFS"},"cell_type":"markdown","source":["**Age d'Otzi : ...**"]}]}