Physics
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:

Velocity
Acceleration
Momentum
Kinetic energy

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Physics
When a piece of pure silicon is doped with aluminium, then

The resistivity of the doped silicon piece will increase
The conductivity of the doped silicon piece will remain the same
The doped silicon piece will become n-type
The doped silicon piece will become p-type

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