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2 answers:
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Answer:
a)
b)
c)
Explanation:
the gravitational potential energy is given by:
The kinetic energy is given by:
the initial kinetic energy is zero because the motion started from rest, so:
applying the conservation of energy theorem:
The work done by the friction force is given by:
the angle of the force is 180 degrees because it's against the movement:
Explanation:
It is given that,
Uncertainty in the speed of an electron,
According to Heisenberg uncertainty principle,
is the uncertainty in the position of an electron
Since,
So, the uncertainty in its position is . Hence, this is the required solution.