The Earth's Orbit Has a Mean Radius of 1

question 4

Multiple Choice

The Earth's orbit has a mean radius of 1.5 × 10⁸ km. Over a six-month period, the apparent position of a particular star varies by 0.00014° due to parallax. How distant is the star, in km?

• A)1.2 × 10¹¹ km
• B)1.2 × 10¹⁴ km
• C)1.2 × 10¹⁷ km
• D)1.2 × 10²⁰ km
• E)1.2 × 10²³ km

Illustrate how uncertainty-identity theory explains group identification under conditions of uncertainty.

Describe how existential threats, such as reminders of mortality, influence group cohesion and identity.

Understand the role of social identity theory in explaining group behavior and self-definition.

Analyze how social facilitation theory explains the effect of the presence of others on task performance.