Question

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Answer 1

Answer:

(a) The Direct Method

Deal with the individual and measure objective criteria.

• Anthropometric methods
• Biochemical and laboratory methods
• Clinical methods
• Dietary evaluation methods

   The Indirect Method

Uses Community health indices that reflects nutritional influences.

• Ecological variables including crop production.
• Economic factors e.g. per capita income, population density and social habits.
• Vital health statics particularly infant under 5 mortality and fertility index.

Answer 2

Answer:

According to the Cartesian sign convention, the focal length should be positive since the convex mirror forms a virtual image to the right of mirror (positive direction) when light comes from left.