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What frequency must a photon have to raise an electron in a hydrogen atom from the n = 2 to the n = 4 state? (h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)
U.S.-Based NGOs
Non-governmental organizations headquartered in the United States that operate on both a domestic and international level, focusing on various issues such as humanitarian aid, environment, and human rights.
Global Presence
The extent to which a company or brand operates in multiple countries around the world and is recognized and available across international markets.
Few Volunteers
A situation where there is a shortage of individuals willing to offer their time and services for a cause or organization without financial compensation.
Nonprofit Organizations
Entities that operate for a collective, public or social benefit, rather than to generate profit for owners or investors.
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