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.
Also, talk to your child's provider or go to the emergency room if your child: 1  Is younger than age 3 months and has a rectal temperature of 100.4Â°F (38Â°C) or higher. 2  Is 3 to 12 months old and has a fever of 102.2Â°F (39Â°C) or higher.  Is under age 2 and has a fever that lasts longer than 48 hours.