What is the name given to the portion of the electrocardiogram between two waves?.

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (

Acar traveling at a constant speed of 22.0 m/s passes a trooper hidden behind a billboard. one second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.50 m/s2. how long does it take the trooper to overtake the speeding car? solve this problem by a graphical method. on the same graph, plot position versus time for the car and the trooper.