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A small sphere is allowed to fall through air,and when the sphere has a speed of 4.8 × 10-4 m/s,the viscous force on the sphere is 3.0 × 10-15 N.If the viscosity of air is 1.4 × 10-5 N·s/m2,what is the radius of the drop?
National Public Radio
A nonprofit media organization that serves as a national syndicator to a network of public radio stations in the United States, offering news, cultural programs, and educational content.
Social Dilemmas
Situations in which individual decisions based on self-interest lead to outcomes that are bad for the whole group.
Postmodern Dilemmas
Complex, intricate problems or challenges that arise in postmodern society, often involving issues of identity, reality, and information saturation.
Population Dynamics
The study of how and why populations change in size and structure over time.
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