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© 1998 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Activity 8
Drip, Drip, Drip
S
tudents
collect
data from a dripping faucet
. Then,
using the TI-73, they
produce data on the
H
ome screen
.
Afterwards, they
view
the same
data
using a table
,
a
graph
,
and the
Trace
feature.
Measurement
and Geometry
♦
rate of change
♦
volume
♦
graphs of equations
Materials
♦
student activity sheets (provided)
♦
sink with faucet or
large container
with a small hole
in lid
♦
watch with second hand
♦
container for collecting water
♦
measuring cups or cylinders
♦
TI-73
³
Activity
—
Part A
Have students perform the steps unless otherwise
indicated.
1. Turn on the faucet to a slow drip, and place a
container to collect the water.
2. Record on the student activity sheet the exact time
when you begin to collect the data.
3. Collect the data for 10 minutes.
4. During the collection, count and record the number of
drops for any 2-minute period.
5. Use the TI-73 to calculate the number of drops per
minute.
a. Go to the Home screen.
- l
b. Enter your 2-minute drip count and divide by 2.
Drip count F Z b
6. Measure the volume of the water collected in the
10-minute period.
➪
If a faucet is not available,
a large container with a
small hole
can
be used
(p
lastic g
allon milk jug,
large can, etc.)
.
Leave the
lid on the container to get
a drip rather than a steady
stream of water.