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.
In general, you should call your pediatrician if your: 1  infant under three months of age has a rectal temperature at or above 100.4 F., 2  infant aged 3-6 months has a temperature above 101 F., or. 3  infant above 6 months has a temperature above 103 F.