Lab 04: Materials Needed: Thermometer, human thermometer (you!), fan or other source of blowing air, 1 glass container (glass cup), 2 foam cups, oven mitt, electric kettle or access to boiling water, kitchen scale, small plastic, waterproof bag (ziploc bag), microwave Course Objectives: 1. Define and interpret heat transfer mechanisms. Topic: Calorimetry Activity #1: Temperature Many people consider themselves to be excellent judges of temperature. "It's cold outside" is something I'm sure we have all heard, but in physics we like to be fairly precise. A fair question to the person making the statement above might be, "what's the temperature?". Most people that have not looked at the weather station recently would likely get it wrong! The reason being that most people are only able to accurately measure a "real feel" measurement of temperature. Given all the variables in weather, that can be quite far from the actual temperature! For example, imagine the weather is a perfect 25C and you are laying on the beach getting a tan. You might start to sweat and think that there is something wrong with your internal body temperature. Likely, you are just experiencing a higher "heat index" than the actual temperature states. The National Weather service does a great job of explaining heat index. For cold temperatures, there is a similar concept called windchill, meaning it feels colder than it actually is. Let's try a few quick experiments to fine tune what we mean by temperature. First a cautionary note, DO NOT get too close to any boiling water! If you are ever unsure if the water you are experimenting with is too hot, test it by sticking a pen or something similar into the water, draw it out, and see if the object you placed in the water is very hot. Mini-experiment#1: . Begin by getting a warm foam cup of water, it doesn't have to be TOO HOT, and one cold cup of water. Quickly pour 1/2 of each cup into a third, empty cup, to make room mild temperature cup. Place one index finger in the warm water, and one in the cold water. After 30 seconds, take each finger out, and put them BOTH in the mild temperature cup. Describe below what you experienced in your fingers throughout the mini experiment