Examlex
Gamma rays are photons with very high energy. How many visible-light photons with a wavelength of 500 nm would you need to match the energy of a gamma-ray photon with energy 4.1 × 10-13?
(h = 6.626 × 10-34 J • s,c = 3.00 × 108 m/s)
Intangibility
Intangibility refers to the characteristic of services that cannot be seen, touched, or physically measured, making them difficult to evaluate before purchase.
Spa Amenities
Features and services provided by a spa, such as massages, facials, and body treatments, aimed at enhancing the guest's relaxation and well-being.
Gross Domestic Product
The total value of all goods and services produced within a country's borders in a specific time period, serving as a measure of economic performance.
Proportion
The relationship between parts and the whole, often expressed as a ratio or fraction, indicating the relative size or importance of elements within a context.
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