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The energy difference between adjacent energy levels in a hydrogen atom
Shyness
Shyness is a feeling of apprehension, lack of comfort, or awkwardness experienced when a person is near, approaching, or being approached by other people, especially in new situations or among strangers.
Pragmatists
Philosophers or thinkers who emphasize practical consequences and real-world effects as critical components of meaning and truth.
Useful
Pertains to something being of value or benefit, serving a purpose or fulfilling a need.
Reality
The sum or aggregate of all that is real or existent within a system, as opposed to that which is only imaginary.
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