Final answer:
Bridges, overpasses, and shaded areas usually freeze before the rest of the roadway because they lose heat quickly. Salt is used on roads to lower the freezing point of water, preventing ice. Antifreeze prevents engine and pipe damage by stopping water inside from freezing and expanding.
Step-by-step explanation:
The places that usually freeze before the rest of the roadway include bridges, overpasses, and shaded areas. This happens because these areas are exposed to the air on all sides, causing them to lose heat more quickly than other parts of the road that are insulated by the ground. Applying salt on the roads is a common practice to lower the freezing point of water, which helps to prevent ice formation and melting existing ice.
Ice is less dense than liquid water, leading rivers, lakes, and oceans to freeze from the top down. This phenomenon creates a protective surface layer that insulates the water below, allowing aquatic life to survive. When water freezes, it expands, which is why antifreeze is crucial for vehicles to prevent engine damage and why unprotected pipes in homes may burst if frozen.
The usage of an antifreeze is vital in preventing the water within automobile engines or home pipes from freezing and expanding, which can cause significant damage. Understanding the principles of freezing point depression through solutes like salt helps in taking preventive measures in cold climates, not only on roads but also for regular maintenance of vehicles and household infrastructures during winter.