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.
1 If your baby is under 3 months old and has a temperature of 100.4 degrees F (38 degrees C) or higher, call the doctor immediately. 2  A baby this young needs to be checked for serious infection or disease.3  If your baby is 3 months old or older, the most important thing is how he looks and acts.ou're the best judge of whether your baby is really ill â so do call if you're worried, no matter what his temperature is. Ask your baby's doctor for more specific advice, but generally: 1  If your baby is under 3 months old and has a temperature of 100.4 degrees F (38 degrees C) or higher, call the doctor immediately.