The larger these peaks and valleys are, the harder it is to slide the object. You can learn more about friction in How Brakes Work. A clutch works because of friction between a clutch plate and a flywheel. We'll look at how these parts work together in the next section.
You should take children older than 3 months to the emergency room (ER) for a fever if the fever is more than 104 degrees for a long period of time. Ice them down first and then bring them to the ER.
If your baby is 3 months or younger, call the doctor right away for a temperature of 100.4 degrees or higher. Babies under 3 months are at higher risk for more serious problems when they get sick, so we like to see them right away, Swanson says.