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A source at rest emits light of wavelength 500 nm.When it is moving at 0.90c away from an observer, the observer detects light of wavelength:
Official Unemployment Rate
The percentage of the labor force that is jobless and actively looking for employment, measured by government statistics.
Part-Time Workers
Individuals who are employed in positions that have fewer hours than a full-time job, typically offering less pay and fewer benefits.
2007-2009 Recession
A period of global economic downturn that began in December 2007 and ended in June 2009, marked by significant declines in economic activity worldwide.
Credit Tightening
A financial condition where lenders restrict the availability of loans, making it harder to borrow, often to curb inflation or cool down an overheating economy.
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