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 protests, you might want to take her underarm (axillary) temperature first. If that reading is over 99 degrees Fahrenheit, take her rectal temperature for a more precise and accurate result. To prepare the thermometer, clean the end with rubbing alcohol or a little soap and warm water.