mỗi giây có 2,1*10^5 electron đập vào màn hình tivi. cường độ dòng điện trong đèn hình của tivi là bao nhiêu?

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?