Â­. Â­Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid.
The time for a broken collarbone to fully heal depends on the severity of the injury. In children, complete healing may take as little as three to six weeks. In adults, six to 16 weeks or more are often necessary for a collarbone to heal solidly.
Scars take a long time to heal. Generally, they take about 1-2 months to heal. However, acne scars usually take 1-2 weeks to fade. You cannot touch the scar, or else it will m â¦ ost likely cause an infection and it may never go away.t can take a torn ACL about 7-9 months to heal. You will need to go through the rehabilitation process for a period of time before you become 100%. Most of these conditions c â¦ omes from playing sports, which is most common with athlete players.