des suspensions lumineuses sont suspendues dans le salon par les deux fils CB et CA accrochés en C. La masse des suspensions lumineuses (S) est m=600g .Calcule les tensions TCA, TCB. On donne l'angle CAB=45° , l'angle CBA=30° .ps schéma triangulaire ​svp aider moi c'est urgent

Which statement best describes the direction of the buoyant force on any object? a. opposite the force of gravity b. in the same direction as the weight c. in the direction of motion of the object d. opposite the direction of motion of the object

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?