Just like you, we learn from our mistakes. We had a few problem is the PFV1 Discovery
Lesson Video We hope this page will help.
First, it was very hard to read the red electronic pen when we showed the calculations for
mass and length, so that is repeated below and you will be able to read it.
MASS
33 peanuts had a mass of 78 grams. 78 gr. / 33 peanuts = 2.4 gr./ peanut.
mass of the flashlight = 263 gr. so, 263 gr. / 2.4 gr. = 109.6.
Therefore 109.6 peanuts = 1 flashlight in mass.
LENGTH
10 peanuts had a length of 37 cm. so 37 cm / 10 peanuts = 3.7 cm / peanut.
flashlight had a length of 17.8 cm, so 17.8 cm / 3.7 cm = 4.8.
Therefore 4.8 peanuts = 1 flashlight in length.
Second, it was difficult to read the supply list for Level 2 and 3, so I copied it below.
Item
Suggested
Supplier
Catalog #
Cost
Total
1 Thermometer
Celsius
Home School
Tools
ME-THER30B
$2.50
$2.50
1 Calorimeter
Dual-Purpose
Home School
Tools
CE-CALORIM
$11.95
$11.95
1 Digital Scale
Home School
Tools
BS-DB0200
$49.95
$49.95
1 Deluxe Hand
generator
Arbor Scientific
P6-2560
$35.00
$35.00
1 LabQuest 2
Vernier
LABQ2
$329.00
$329.00
1 Differential
Voltage Probe
Vernier
DVP-BTA
$39.00
$39.00
1 Current
Probe
Vernier
DCP-BTA
$39.00
$39.00
1 Temperature
Probe
Vernier
TMP-BTA
$29.00
$29.00
1 Measuring
Cup
Local
Tin Cans of
assorted sizes
Home
Aluminum Pan
Home
Large Paper
Clips
Home
Level 2 PF/ 2 / 1
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#
!!
username
Version 1.0
Copy-write 2013 Physics Pharm Consulting
Peanut Power!
Great work on PF 1! Now that we know that this is all about energy, we have to learn how to
measure the energy in a peanut. To be able to do that, we must understand a unit of heat that
is used to describe the energy in a peanut or any other food. That unit of heat is called a
calorie. However, there are two different types of calories.
Can you find out about calories, or is it Calories? Record what you find out below.
YOUR IDEAS
Score
?/10
EDITS
PF / 2 / 2
Now that we understand a food calorie or more correctly a kilocalorie, we can find out
what the web has to say about the number of kilocalories in a raw peanut seed. Since we
are now comparing a single peanut seed to a single D cell, we need to discover the
energy in a single seed of a raw peanut. Check the web and record your answers below.
Again, you might find conflicting values. How did you decide which value to use? How
sure are you that the value you chose is the best value? Write your ideas below.
YOUR IDEAS
Score
?/20
EDITS
There is another place we can get information. On the food packages! Food packages
tell you how many calories are in a food product. Go to your local food store and record
what you find on the labels in “Your Ideas” below. Also, record the type of peanut and the
serving size.
YOUR IDEAS
EDITS
Score
?/20
PF / 2 / 3
You should have a good idea of the number of calories in a serving of peanuts. What about the
number of peanuts in a serving? When you watch Video Discovery Lesson PFV2 I will show
you three different types of peanuts that I weighed to find out how many peanuts in an oz.
I hope you have the digital balance to find your own results.
Type of Peanut
Peanuts / OZ.
1 OZ. = 28.35 grams
Raw Peanuts , shelled
31 whole peanuts, no halves.
Spartan roasted salted blanched
31 whole peanuts, no halves.
Planters Cocktail
26 whole peanuts, no halves.
With the information you have gathered from the web, the local food store and the information
above, you should be able to determine the number of kilocalories in a single peanut seed.
You may have noticed that on the product labeling is listed the number of pieces in an oz. It
will not agree with my numbers because I used only whole peanut seeds, no halves.
How many kilocalories in a single peanut seed?
YOUR IDEAS
Show your calculations below.
YOUR IDEAS
PF/ 2 / 4
What I found out.
EDITS
Sample Calculations
EDITS
Caution!! Be careful, Tin cans can have sharp edges. The burning peanut will be
hot and produce smoke. The water in the calorimeter will be hot. Younger
engineers should have adult help!
Good Job! Now for some Engineering. If you purchased the Calorimeter listed in the supply
table, check it out. Could you use it to measure the temperature rise of water in the inner can
from a burning peanut seed?
Not a good idea! It is surrounded by foam insulation that would melt or burn. That Calorimeter
is for use with the Level 3 Experience Pages.
We need to design a homemade Calorimeter out of tin cans to do this job. If you have no idea
how to make one, stop here and watch Video Discovery Lesson PFV2. I will show you the one
I made. You can then use your own ideas to make it better.
PF/ 2 / 5
Draw your Calorimeter design here.
Score
YOUR
IDEAS
?/30
Score 10 points if you
made a drawing of your
design and another 20
points if you actually
built it and measured
the energy in a raw
peanut seed..
Watch Video Discovery Lesson PFV2 to see my design.
EDITS
Write the number of kilocalories in a single peanut seed. You will get my value at
the end of Video Discovery Lesson PFV2. Do you agree? Write your results here
Score
?/20