Quiz — 656ca4b252548_Corrigé-Révision DS1.pdf

Question 1 sur 10 20:00

[{"id":47238,"question":"Quelle est la formule de la vitesse moyenne en mécanique ?","option_a":"v = d × t","option_b":"v = d \/ t","option_c":"v = t \/ d","option_d":"v = d + t","option_e":"","option_f":"","bonne_reponse":"b","explication":"La vitesse moyenne se calcule en divisant la distance parcourue (d) par le temps mis (t). La formule correcte est donc v = d \/ t.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"v = d × t\", \"b\": \"v = d \/ t\", \"c\": \"v = t \/ d\", \"d\": \"v = d + t\"","_debug_options_count":4},{"id":47239,"question":"La tension électrique se mesure en volts.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La tension électrique se mesure bien en volts (V), unité du système international.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":47240,"question":"Quel est le symbole chimique de l’eau ?","option_a":"O2","option_b":"H2O","option_c":"CO2","option_d":"N2","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le symbole chimique de l’eau est H2O, composé de deux atomes d’hydrogène et d’un atome d’oxygène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"O2\", \"b\": \"H2O\", \"c\": \"CO2\", \"d\": \"N2\"}}","_debug_options_count":4},{"id":47241,"question":"La loi d’Ohm s’écrit : U = R × I.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d’Ohm s’écrit bien U = R × I, où U est la tension, R la résistance et I l’intensité du courant.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":47242,"question":"Quelle est l’unité de la force en système international ?","option_a":"Newton (N)","option_b":"Joule (J)","option_c":"Watt (W)","option_d":"Pascal (Pa)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L’unité de la force dans le système international est le Newton (N), en hommage à Isaac Newton.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Newton (N)\", \"b\": \"Joule (J)\", \"c\": \"Watt (W)\", \"d\": \"Pascal (Pa)","_debug_options_count":4},{"id":47243,"question":"La réaction de combustion du méthane produit du CO2 et de l’eau.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La combustion complète du méthane (CH4) produit bien du dioxyde de carbone (CO2) et de l’eau (H2O).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":47244,"question":"Quelle est la formule de l’énergie cinétique ?","option_a":"Ec = ½ m × v²","option_b":"Ec = m × v","option_c":"Ec = m × g × h","option_d":"Ec = ½ m × v","option_e":"","option_f":"","bonne_reponse":"a","explication":"L’énergie cinétique se calcule avec la formule Ec = ½ m × v², où m est la masse et v la vitesse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Ec = ½ m × v²\", \"b\": \"Ec = m × v\", \"c\": \"Ec = m × g × h\", \"","_debug_options_count":4},{"id":47245,"question":"La résistance électrique se mesure en ohms.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La résistance électrique s’exprime bien en ohms (Ω), unité du système international.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":47246,"question":"Quel est le pH d’une solution neutre ?","option_a":"pH = 0","option_b":"pH = 7","option_c":"pH = 14","option_d":"pH = 10","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une solution neutre a un pH égal à 7. Un pH inférieur à 7 indique une solution acide, et supérieur à 7 une solution basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"pH = 0\", \"b\": \"pH = 7\", \"c\": \"pH = 14\", \"d\": \"pH = 10\"}}","_debug_options_count":4},{"id":47247,"question":"La troisième loi de Newton stipule que les forces s’appliquent par paires.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La troisième loi de Newton, ou principe des actions réciproques, indique que toute force d’action s’accompagne d’une force de réaction égale et opposée.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]