Find the centre of mass of a water molecule. Angles and distances are shown in Fig. 5.2. The mass of a hydrogen atom is 1.0 u, and the mass of an oxygen atom is 16 u, where u is the atomic mass unit. Choose an appropriate coordinate system. 
Definitions:
Minimum Wage
The lowest legally permissible amount that workers can be paid by employers, usually set by government policy.
Principal-agent Problem
A conflict of interest that arises when one party (the agent) is expected to act in the best interest of another (the principal) but has incentives to act in their own interest.
Purely Competitive Labor Market
A resource market in which many firms compete with one another in hiring a specific kind of labor, numerous equally qualified workers supply that labor, and no one controls the market wage rate.
Rate of Unionization
The percentage of workers who are members of a union within a particular workforce or industry.
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