双金属板由两种不同热膨胀系数的材料组成。板材顶部的热膨胀系数小于底部。如果整个盘子的温度升高，盘子会怎样？

Question

BlackTom AI · Accepted Answer

This question describes a classic bimetallic strip: two layers with different thermal expansion coefficients are bonded together. When temperature rises, the layer with the larger coefficient expands more than the one with the smaller coefficient, causing the strip to deform rather than stay flat.
Option 1: 弯曲 (bend). This is the correct outcome because the bottom layer has the greater thermal expansion, pulling the strip into a curved shape with the top layer on the outside of the bend.
Option 2: 弯腰 (stoop). This term typically refers to bending at the waist in a vertical sense, not a mechanical deformation of a layered strip. It does not describe the bending of a composite material, so it’s inaccurate for this scenario.
Option 3: 合同 (contract). If temperature increases, materials with higher expansion coefficients expand rather than contract. Since both layers are bonded and one expands more, the composite bends outward rather than contracts overall, making this choice incorrect.
Option 4: 保持不变 (remain unchanged). The differential expansion guarantees some deformation occurs; thus, claiming no change contradicts the physical behavior of a bimetallic strip under heating.

SPHY001 Practice Quiz - Unit 13 | LA053

双金属板由两种不同热膨胀系数的材料组成。板材顶部的热膨胀系数小于底部。如果整个盘子的温度升高，盘子会怎样？

View Explanation

Log in for full answers

Similar Questions

What is the difference between coefficient of linear expansion (α) and coefficient of volume expansion (β)?

Which of the following is the correct set of formula for thermal expansion in solid objects?

What happens to the cavity inside an object if the temperature is increased?

What is thermal expansion?

An aluminum plate has a circular hole. If the temperature of the plate increases, what happens to the size of the hole?

Some iron has a coefficient of linear expansion of 12 x 10-6 K-1. A 100mm length of iron piping is heated through 20 K. The pipe extends by:

A bimetal plate consists of two materials of different coefficients of thermal expansion. The coefficient of thermal expansion of the top part of the plate is less than the bottom part. If the temperature of the entire plate increases, what happens to the plate?

An aluminum plate has a circular hole. If the temperature of the plate increases, what happens to the size of the hole?

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler