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.
Rectal Temperature: How to Take. 1  Age: Birth to 4 years old. 2  Have your child lie stomach down on your lap. 3  Put some petroleum jelly on the end of the thermometer and the anus.  Slide the thermometer gently into the anus about 1 1  inch. Hold your child still.  Your child has a fever if the rectal temp is above 100.4Â° F (38Â° C).