If an object is thrown up at an initial velocity of 9.8 m/s, how long will it take to fall back down to the ground?

1.0 s
2.0 s

Is a copper wire a conductor or insulator?

Ivana walks 2km north then turns around and walks 3km south

Adistance-time graph indicates than an object moves 100 m in 4 s and then remains at rest for 6 s. what is the average speed of the object?