Three Particles, Each of Which Has a Mass of 80

question 40

Multiple Choice

Three particles, each of which has a mass of 80 g, are positioned at the vertices of an equilateral triangle with sides of length 60 cm. The particles are connected by rods of negligible mass. What is the moment of inertia of this rigid body about an axis that is parallel to one side of the triangle and passes through the respective midpoints of the other two sides?

• A) 0.018 kg⋅m²
• B) 0.020 kg⋅m²
• C) 0.016 kg⋅m²
• D) 0.022 kg⋅m²
• E) 0.032 kg⋅m²

Explain the logic of liquidity preference theory and its effect on aggregate demand.

Understand the reasons for the downward slope of the aggregate-demand curve and the significance of the wealth, interest-rate, and exchange-rate effects.

Understand the principles and evidence supporting the matching hypothesis in relationships.

Grasp evolutionary explanations of dating, mating habits, and mate selection preferences.

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Definitions:

Infant Growth Restriction

A condition characterized by a fetus or infant having a significantly lower weight or size than expected for its gestational age, often due to genetic factors, maternal health, or environmental influences.

Postnatal Year

The first year of life following birth, a critical period for growth and development.

Maternal Health

The health of women during pregnancy, childbirth, and the postpartum period, including physical, mental, and social well-being.

Genetics

The branch of biology that studies genes, heredity, and the variation of organisms, explaining how traits are passed from parents to offspring.