Quiz — 660ae1cdcde7f_-_série 25 pression.pdf

Question 1 sur 10 20:00

[{"id":44605,"question":"Quelle est l'unité SI de la pression ?","option_a":"Pascal (Pa)","option_b":"Newton (N)","option_c":"Joule (J)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le Pascal (Pa) est l'unité de pression dans le système international, équivalent à 1 N\/m².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Pascal (Pa)\", \"b\": \"Newton (N)\", \"c\": \"Joule (J)\", \"d\": \"Watt (W)","_debug_options_count":4},{"id":44606,"question":"La pression hydrostatique augmente avec la profondeur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai : la pression hydrostatique est proportionnelle à la profondeur dans un fluide incompressible.","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":44607,"question":"Quel instrument mesure la pression atmosphérique ?","option_a":"Dynamomètre","option_b":"Baromètre","option_c":"Manomètre","option_d":"Thermomètre","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le baromètre est spécialement conçu pour mesurer la pression atmosphérique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Dynamomètre\", \"b\": \"Baromètre\", \"c\": \"Manomètre\", \"d\": \"Thermo","_debug_options_count":4},{"id":44608,"question":"La poussée d'Archimède est égale au poids du fluide déplacé.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai : c'est le principe d'Archimède, qui explique la flottabilité des objets dans un fluide.","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":44609,"question":"Quelle formule relie la pression (P), la masse volumique (ρ), la hauteur (h) et l'accélération de la pesanteur (g) ?","option_a":"P = ρ + g + h","option_b":"P = ρ × g × h","option_c":"P = ρ \/ (g × h)","option_d":"P = g \/ (ρ × h)","option_e":"","option_f":"","bonne_reponse":"b","explication":"La formule correcte est P = ρ × g × h, où ρ est la masse volumique, g l'accélération de la pesanteur et h la hauteur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"P = ρ + g + h\", \"b\": \"P = ρ × g × h\", \"c\": \"P = ρ \/ (g × h)","_debug_options_count":4},{"id":44610,"question":"Un plongeur descend à 10 mètres sous l'eau. Quelle est la pression hydrostatique subie (ρ_eau = 1000 kg\/m³, g = 10 N\/kg) ?","option_a":"10 000 Pa","option_b":"100 000 Pa","option_c":"1 000 Pa","option_d":"1 000 000 Pa","option_e":"","option_f":"","bonne_reponse":"b","explication":"P = ρ × g × h = 1000 × 10 × 10 = 100 000 Pa (1 bar).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"10 000 Pa\", \"b\": \"100 000 Pa\", \"c\": \"1 000 Pa\", \"d\": \"1 000 000 P","_debug_options_count":4},{"id":44611,"question":"Le principe de Pascal s'applique uniquement aux gaz.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux : le principe de Pascal s'applique à tous les fluides (liquides et gaz).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":44612,"question":"Quelle est la pression atmosphérique normale au niveau de la mer ?","option_a":"1013 hPa","option_b":"1000 Pa","option_c":"1 atm","option_d":"760 mmHg","option_e":"","option_f":"","bonne_reponse":"a","explication":"La pression atmosphérique normale est d'environ 1013 hPa, soit 1 atm ou 760 mmHg.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"1013 hPa\", \"b\": \"1000 Pa\", \"c\": \"1 atm\", \"d\": \"760 mmHg\"}}","_debug_options_count":4},{"id":44613,"question":"Un objet de volume 0,5 m³ est immergé dans l'eau (ρ_eau = 1000 kg\/m³). Quelle est la poussée d'Archimède subie ?","option_a":"500 N","option_b":"5000 N","option_c":"50 N","option_d":"50000 N","option_e":"","option_f":"","bonne_reponse":"a","explication":"Poussée = ρ × V × g = 1000 × 0,5 × 10 = 5000 N. La poussée d'Archimède est égale au poids du fluide déplacé.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"500 N\", \"b\": \"5000 N\", \"c\": \"50 N\", \"d\": \"50000 N\"}}","_debug_options_count":4},{"id":44614,"question":"La pression est une grandeur vectorielle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux : la pression est une grandeur scalaire, elle n'a pas de direction.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]