The Amount of Sunshine Illuminating a Wall of a Building

question 111

Multiple Choice

The amount of sunshine illuminating a wall of a building can greatly affect the energy efficiency of the building. The solar radiation striking a vertical wall that faces east is given by the formula where R ₀ is the maximum solar radiation possible, is the angle that the sun makes with the horizontal, and is the direction of the sun in the sky, with = 90 ^o when the sun is in the east and = 0 ^o when the sun is in the south. What percentage of R ₀ is striking the wall when is equal to 30 ^o and the sun is in the southeast?
Round the answer to the nearest integer.

• A)71 %
• B)61 %
• C)56 %
• D)76 %
• E)29 %

---

Definitions:

Less than Six Months

A term used to describe a period or duration that does not exceed six months.

More than One Year

Refers to a time frame in accounting and finance that indicates durations or periods extending beyond a twelve-month or one-year period.

Transaction Analysis

The process of studying a transaction to determine its economic effect on the business in terms of the accounting equation.

Accounting Equation

The foundational principle of double-entry bookkeeping, stating that assets equal liabilities plus shareholders' equity.