The Figure Shows a Group of Three Particles, All of Which

question 32

Multiple Choice

The figure shows a group of three particles, all of which have charge Q = 8.8 nC. How much work did it take to assemble this group of charges if they all started out extremely far from each other? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

• A) 5.5 × 10^-5 J
• B) 6.2 × 10^-5 J
• C) 5.7 × 10^-5 J
• D) 5.9 × 10^-5 J

Describe the structural adaptations in various animals that facilitate efficient gas exchange.

Explain the concept of countercurrent exchange and its role in maximizing oxygen absorption in aquatic organisms.

Identify the primary sites of gas exchange in different groups of animals, including mammals, birds, insects, and aquatic organisms.

Describe the process of gas exchange at the cellular level, including oxygen and carbon dioxide transport.

---

Definitions:

Predetermined Overhead Rate

A rate calculated before the accounting period begins, used to apply manufacturing overhead costs to products by estimating fixed and variable manufacturing overhead costs for the coming period.

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead to individual units of production, based on estimated costs.

MH

Often used as an abbreviation for "machine hours," representing the amount of time machines are operated in the production process.

Variable Overhead Rate Variance

The difference between actual variable overhead incurred and the standard cost allocated based on activity level.