Question bank: Surface Expansion

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Question 1:

Medium

A steel handrail was installed on a footbridge to provide safety for pedestrians. Originally, the footbridge is 30 m long and the handrail was installed with exactly 30 m in length at the ambient temperature of 20°C. On a hot summer day, the ambient temperature rises to 50°C. Knowing that the linear expansion coefficient of steel is 12x, what is the new measurement of the handrail that slightly compresses along the length of the footbridge with the temperature increase? Hint: The formula to be used is ΔL = L0 × α × ΔT.

Surface Expansion

Question 2:

Medium

Spatial dilation is the physical phenomenon that occurs when an object undergoes changes in its linear dimensions. This phenomenon can be explained by different factors, such as temperature, pressure, and the type of material. Considering spatial dilation, which of the options below presents a true statement?

Surface Expansion

Contextualized Question

Question 3:

Medium

A solid material is uniformly heated to a temperature four times higher than its initial temperature. Which of the coefficients below refers to the increase in the surface area of this material due to expansion?

Surface Expansion

Contextualized Question

Question 4:

Medium

The coefficient of superficial expansion of metals is generally higher than that of non-metallic materials. What would be the effect of this difference on superficial expansion?

Surface Expansion

Question 5:

Medium

When an object is heated, its dimensions tend to increase, and this phenomenon is known as spatial expansion. Considering that the linear expansion coefficient of a certain material is equal to 0.00025°C⁻¹, determine the variation in length of a 2 m bar when heated to 50°C.

Surface Expansion

Contextualized Question

IARA TIP

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