What are two examples of how we use the concepts of expansion and contraction due to temperature changes in every day life? EXPLAIN HOW they use expansion and contraction.



You can NOT receive full credit without explaining HOW your examples use contraction and expansion.

i need this fast please help

A thermometer is the first thing I thought of

(a) including instructions like "You can NOT receive full credit without explaining HOW your examples use contraction and expansion." serves no purpose. I'm not interested in full credit, just helping you understand the question.

(b) no one sits here all day just waiting for you to ask a question. We live our lives, and check in from time to time to see what new questions have been posted. There is no guarantee anyone will see your question the instant you post it. Waiting till your answer is due is just foolish.

Yup your totally wright oobleck , were just here to help each and other people to understand things they can't

Two examples of how we use the concepts of expansion and contraction due to temperature changes in everyday life are:

1. Thermometers: Thermometers are widely used to measure temperature in various settings such as in homes, hospitals, and laboratories. They work based on the principle of expansion and contraction of materials with temperature changes. Inside a thermometer, there is a liquid (usually mercury or alcohol) that expands or contracts as the temperature rises or falls. This expansion or contraction of the liquid causes it to move up or down the calibrated scale, allowing us to read and interpret the temperature.

The expansion and contraction of the liquid inside the thermometer is critical for accurate temperature measurement. When the temperature increases, the liquid expands, causing it to rise inside the thermometer, indicating a higher temperature. Conversely, when the temperature decreases, the liquid contracts, causing it to lower inside the thermometer, indicating a lower temperature. By understanding the principles of expansion and contraction, we can rely on thermometers to measure temperature reliably and accurately.

2. Railroads: Railroads also heavily rely on the concepts of expansion and contraction due to temperature changes. The tracks used in railroad systems are made of metal, typically steel. Metal expands and contracts with temperature changes, and with railway tracks being exposed to outdoor conditions, they experience significant temperature variations throughout the day and year.

To accommodate the expansion and contraction of the tracks, engineers leave small gaps between the sections of the rails. These gaps, known as expansion joints, allow the tracks to expand without causing damage or buckling. Additionally, in extremely hot conditions, railroad tracks can expand significantly, which may lead to the rails bending or warping. To prevent this, engineers install devices called continuous welded rail (CWR) which use long sections of rail without any gaps. CWR allows the tracks to smoothly expand and contract without compromising their structure or safety.

By considering the expansion and contraction of materials used in the construction of railroads, engineers can ensure the tracks remain in good condition and provide a safe and efficient mode of transportation.