Question
Many cities have to deal with icy roads during the winter. To fix the problem,
city workers pour salt onto the roads. Which rule about the physical world are
they using?
A. Sand can also be used to treat icy roads.
B. Damage to cars resulting from salted roads has cost people
billions of dollars.
C. Many cities use salt to deice roads.
D. Salt helps ice melt at colder temperatures.
city workers pour salt onto the roads. Which rule about the physical world are
they using?
A. Sand can also be used to treat icy roads.
B. Damage to cars resulting from salted roads has cost people
billions of dollars.
C. Many cities use salt to deice roads.
D. Salt helps ice melt at colder temperatures.
Ask by Beck Horton. in the United States
Jan 24,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
City workers use the rule that salt lowers the freezing point of ice, allowing it to melt at lower temperatures.
Solution
The rule about the physical world that city workers are using when they pour salt onto icy roads is:
D. Salt helps ice melt at colder temperatures.
This statement reflects a scientific principle regarding the freezing point depression, which explains how adding salt to ice lowers its melting point, allowing the ice to melt even when temperatures are below the normal freezing point of water.
Answered by UpStudy AI and reviewed by a Professional Tutor
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Simplify this solution The Deep Dive
When city workers pour salt onto icy roads, they are leveraging the fascinating science of freezing point depression. Salt lowers the freezing point of water, allowing the ice to melt even at temperatures below 0°C (32°F). This is why roads are treated with salt to prevent slips and accidents!
In real-world applications, this method of de-icing not only helps keep roads safer for drivers during the winter months but also comes with its own set of challenges. Too much salt can lead to environmental issues like soil degradation and harm to plant life, prompting cities to explore more sustainable alternatives, such as beet juice or magnesium chloride!
