Which best describes an example of an n-type semiconductor? O It uses phosphorus so that electrical conduction is due to the movement of electrons.
O It uses phosphorus so that electrical conduction is due to the movement of a positive charge.
O It uses gallium so that electrical conduction is due to the movement of electrons.
O It uses gallium so that electrical conduction is due to the movement of a positive charge.​

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

pecialized keyboards

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle