Two Identical Concrete Slabs Lie Flat and in Contact with Each

question 34

Multiple Choice

Two identical concrete slabs lie flat and in contact with each other as shown in the figure. If the temperature increases by 40°C, the lower edges opposite the contact edges remained fixed in position, and the lower edges of the contact side remain in contact, at what angle will the slabs be tilted? The coefficient of thermal expansion of the concrete is 10 × 10^-6/K.

• A) 19°
• B) 0.028°
• C) 15°
• D) 1.6°
• E) The answer depends on the length of the slabs.

---

Definitions:

Gravel

A loose aggregation of rock fragments, pebbles, and small stones, often used in construction and as a surface material for roads and driveways.

Uranium

A dense, metallic element used as fuel in nuclear reactors and as a component in nuclear weapons, known for its radioactive properties.

Regression

A process in statistics that determines the relationship between variables, or in geology, the retreat of the sea from the land.

Unit 1

Often a reference to the primary or initial segment in a series within educational materials or scientific classifications, indicating foundational knowledge or elements.