Vernier Software & Technology

# Chill Out: How Hot Objects Cool

## Introduction

When you have a hot drink, you know that it gradually cools off. Newton’s law of cooling provides us with a model for cooling. It states that the temperature difference Tdiff between a hot object and its surroundings decreases exponentially with time.

${T_{diff}} = {T_0}{e^{ - kt}}$

In the model T0 is the initial temperature difference, and k is a positive constant.

In this activity you will use a Temperature Probe to collect data as the warmed probe cools. You can then fit several mathematical models to the data.

## Objectives

• Record temperature versus time cooling data.
• Model cooling data with an exponential function.

## Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

### Option 2

You may also need an interface and software for data collection. What do I need for data collection?