Un pasager a întârziat la tren. Ajuns pe peron a observat trenul în mişcare şi a constatat că unul din vagoane a trecut prin
faţa sa în intervalul de timp t1=6,6s, iar vagonul al doilea în
23
t2=6,0s. Considerând mişcarea trenului rectilinie uniform
accelerată, să se determine:
a) intervalul de timp τ cu care a întârziat pasagerul;
b) intervalul de timp t3 în care prin faţa sa trece vagonul
următor.

Sound is a disturbance that travels through a medium as a

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?