Heat transfer lab
Radiation: needs no medium, can be reflected
Conduction: “contact” uses the medium, can be insulated
Convection: medium in motion, covers can stop this motion
Calculating decay rates (easy math)
A0 is temp in °C at the beginning
At is temp in °C at some time later
t is time in seconds
Vernier Logger Pro setup
Command-D is setup
time is 1200 seconds
rate is 10 seconds per sample
use two temp sensors (one in the device, one out)
calculate k values for three different devices
example:
Metal container, open
temp 1: 45
temp 2 (outside) 22
difference = 23 °C beginning
1200 seconds later:
temp 1: 35
temp 2: 22
difference = 13°C
ln(13/23) = .57
.57/1200 = 4.75 x 10-4
Lab report format: