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What is the processes by which the liquid in a thermometer or sections of a sidewalk increase in volume at a higher temperature?
thermal expantion
What is the process by which the liquid in a thermometer or section of a sidewalk increase volume at a higher temperature?
thermal expantion
What would happen if there weren't any spaces between sections in the sidewalk?
If there weren't any spaces between sections of the sidewalk, it could lead to several issues. First, the lack of expansion joints would cause the concrete to crack and buckle due to temperature changes and ground movement. Additionally, without gaps, water could accumulate, leading to potential slip hazards and increased wear on the surface. Ultimately, it would compromise the longevity and safety of the sidewalk.
0. Lifted sections of sidewalk along tree lined streets?
Dangerd
Should your sidewalk be higher than the lawn?
Yes, it should be. If the sidewalk is not higher than the lawn water will collect on top of the sidewalk when it rains. If the temperature drops below freezing the sidewalk could crack.
What should be the thickness of a concrete sidewalk?
It depends on the size of the sections, but generally, no less than 4 inches.
What factor increase the number cases of TB?
spitting on the sidewalk
Side walk is warmed by the heat of the sun physical or chemical?
The sidewalk being warmed by the heat of the sun is a physical process. The sun's rays transfer heat energy to the sidewalk through radiation, causing the molecules in the sidewalk to vibrate more rapidly and increase in temperature. This is a physical change as no new substances are being formed in this process.
What can be done to increase helpful friction?
sand applied to a slick sidewalk
Is raised sections of sidewalk along treeline streets chemical or mechanical?
Raised sections of sidewalk along treeline streets are typically a mechanical issue, caused by the roots of trees growing underneath the pavement. As tree roots expand, they can push up the concrete or asphalt, leading to uneven surfaces. This mechanical displacement is not due to chemical processes but rather the physical growth of the roots interacting with the sidewalk material.
What is happening when direct sunlight heats the sidewalk?
When direct sunlight heats the sidewalk, the concrete absorbs the sun's energy. This energy increases the temperature of the sidewalk by causing its particles to vibrate more rapidly, resulting in the sidewalk feeling hot to touch.
When you walk bearfoot across a hot sidewalk you feel heat on your feet. explain What is happening with the molecules in both the sidewalk and your feet and in which direction thermal energy is moving?
As you walk barefoot on a hot sidewalk, the sidewalk molecules vibrate more due to the heat, transferring thermal energy to your feet. The heat is moving from the sidewalk (higher temperature) to your feet (lower temperature), causing your feet to feel hot. The increased molecular vibrations in the sidewalk result in the sensation of heat on your feet as thermal energy is transferred.
