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.
Infants normally have a temperature of 99-100. If your infant is under two months and has a fever over 100.5Â°F (38.1Â°C), call us immediately! However, fever in children 3 months or over is usually NOT an emergency, unless the child looks extremely sick or the temperature is over 104.6Â°F. Older children may sometimes run very high fevers due to a self-limited virus. Temperatures over 104.6Â°F are somewhat more likely to indicate a bacterial infection, so an emergency call for temperatures over 104.6Â°F might be warranted, depending on other symptoms.