A student believes a metal rod will gain a negative static charge when
1 answer:
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To solve this problem we will use the concept related to electrons in a box which determines the energy of an electron in that state.
Mathematically this expression is given by,
Where,
m = mass of an electron
h = Planck's constant
n = is the integer number of the eigenstate
L = Quantum well width
The change in energy must be given in state 1 and 2, therefore
Replacing we have:
Therefore the correct answer is C.
Answer: 15.87 m
From the equation of motion:
where, is the distance traveled,
is the initial velocity,
is the acceleration and
is the time.
The rock free falls under gravity. Initial velocity, ,
It took for rock to hit the water.
Substitute the values in the given equation:
Hence, the water is 15.87 m below the top level of the well.