Lab
Quantized Mass
Printer Friendly Version
Purpose
To let each student become familiar with measuring with a triple beam balance and to develop critical thinking skills. Secondly, to introduce student to a technique of data analysis using linear regression.
Measuring Masses
Each group of two will receive 10 envelopes containing identical index cards.
NOTE: If there are not enough balances, one group at a time should measure their envelopes. It ought to not take more than 5-8 minutes get the 10 mass measures. After each group is through with the balance, they can return to their own computer/lab station to complete their analysis and let a second group use the balance.
After zeroing your triple beam balance, measure the mass of each of the 10 envelopes. In the table below, record the number of cards identified as being in each envelope and the sealed envelope's mass. Do NOT open any of your envelopes. Two envelopes will be identified only by letters. Measure and record their masses and then place their values in the last two rows of the data chart.
Envelope
# or letter
Mass (g)
1
2
3
4
5
6
7
8
9
10
Analysis.
EXCEL will now graph your data. To reach the template, open the physics shared drive using the icon on your desktop. Locate your period's folder and open the template 1-mass.xls. You will most likely be asked to open the file as "read only" - that is fine. As soon as the file is open, use File Save As to rename the file as
QuantizedMass-LastnameLastname.xls
in your period's folder. This copy of the file now belongs uniquely to your group. Remember that there are to be no spaces in the file name.
What is the name of your file?
Input your values for the number of cards and the mass of each envelop into the spreadsheet. (Do not enter the information from the envelope that has a letter instead of a number). As you enter your data, its graph will grow. When your graph is finished, be certain that any points that are obviously out-of-line have been rechecked for accuracy - either in measurement, or for a mistake in typing. Update your saved file and print a copy of the data table and graph for each group member.
Conclusions.
What was the numerical value of your line's slope?
What was the numerical value of your line's y-axis intercept?
What is the equation of your line using the variables M for mass and N for the number of cards?
Refer to the following information for the next two questions.
Use the equation of your line to answer the following questions. Place your answers on your graph's printout as well as in this form.
What is the significance of the slope of the line? That is, what physical property does it represent?
What is the significance of the y-axis intercept of your line? That is, what physical property does it represent?
Refer to the following information for the next four questions.
Use the equation of your line to experimentally determine the number of cards in your "lettered" envelope. Remember that you are not allowed to open any envelopes. Show any required calculations on the bottom of your graph printouts.
Our
letter
was ___.
It's mass was ____ grams.
It contained ____ cards
In physics we often refer to quantities being "quantized." For example, charged objects can only carry an electric charge that is an integer multiple of the fundamental charge (1 |e| = 1.6 x 10
^{-19}
coulombs). This tells us that a charged object could never have a charge of 12.5|e| or 20 x 10
^{-19}
coulombs.
Give an example of a mass reading that would not have not been valid in this experiment. Explain your reasoning.
Lab Report
. After you have submitted your online form, turn in your individual calculations for your
conclusions
to the one-way box.
Related Documents
Lab:
Labs -
2-Meter Stick Readings
Labs -
A Photoelectric Effect Analogy
Labs -
Acceleration Down an Inclined Plane
Labs -
Addition of Forces
Labs -
Basic Particles
Labs -
Circumference and Diameter
Labs -
Cookie Sale Problem
Labs -
Density of a Paper Clip
Labs -
Determining the Distance to the Moon
Labs -
Determining the Distance to the Sun
Labs -
Eratosthenes' Measure of the Earth's Circumference
Labs -
Experimental Radius
Labs -
Force Table - Force Vectors in Equilibrium
Labs -
Home to School
Labs -
Hydrogen Spectrum
Labs -
Hydrogen Spectrum
Labs -
Indirect Measurements: Height by Measuring The Length of a Shadow
Labs -
Indirect Measures: Inscribed Circles
Labs -
Inertial Mass
Labs -
Introductory Simple Pendulums
Labs -
Lab: Rectangle Measurements
Labs -
Lab: Triangle Measurements
Labs -
Marble Tube Launcher
Labs -
Mass of an Electron
Labs -
Mass of the Top Quark
Labs -
Mirror Symmetry
Labs -
Radiation of a Metal Cylinder
Labs -
The Size of the Moon
Labs -
The Size of the Sun
Labs -
Using Young's Equation - Wavelength of a Helium-Neon Laser
Labs -
Video Lab: Falling Coffee Filters
Resource Lesson:
RL -
An Outline: Dual Nature of Light and Matter
RL -
Atomic Models and Spectra
RL -
Basic Trigonometry
RL -
Basic Trigonometry Table
RL -
Curve Fitting Patterns
RL -
Derivation of Bohr's Model for the Hydrogen Spectrum
RL -
Dimensional Analysis
RL -
Energy-Level Diagrams
RL -
Excitation
RL -
Famous Discoveries and Experiments
RL -
Famous Discoveries: Bohr Model
RL -
Famous Discoveries: de Broglie Matter Waves
RL -
Famous Discoveries: The Franck-Hertz Experiment
RL -
Famous Discoveries: The Photoelectric Effect
RL -
Famous Experiments: Davisson-Germer
RL -
Famous Experiments: Michelson-Morley
RL -
Famous Experiments: Millikan's Oil Drop
RL -
Famous Experiments: The Compton Effect
RL -
Famous Experiments: The Discovery of the Neutron
RL -
Linear Regression and Data Analysis Methods
RL -
Metric Prefixes, Scientific Notation, and Conversions
RL -
Metric System Definitions
RL -
Metric Units of Measurement
RL -
Nuclear Reaction
RL -
Potential Energy Functions
RL -
Properties of Lines
RL -
Properties of Vectors
RL -
Significant Figures and Scientific Notation
RL -
Vector Resultants: Average Velocity
RL -
Vectors and Scalars
RL -
What is Mass?
REV -
Orbitals
Review:
REV -
Honors Review: Waves and Introductory Skills
REV -
Physics I Review: Waves and Introductory Skills
REV -
Test #1: APC Review Sheet
Worksheet:
APP -
Eternally Bohring
APP -
Nuclear Flu
APP -
Puppy Love
APP -
The Dognapping
APP -
The Pool Game
APP -
The Science Fair
APP -
War Games
APP -
What's My Line
CP -
Atomic Nature of Matter
CP -
Atomic Nucleus and Radioactivity
CP -
Balancing Nuclear Equations
CP -
Inverse Square Relationships
CP -
Natural Transmutations
CP -
Nuclear Fission and Fusion
CP -
Radioactive Half Life
CP -
Sailboats: A Vector Application
CP -
Satellites: Circular and Elliptical
CP -
Tensions and Equilibrium
CP -
The Atom and the Quantum
CP -
Vectors and Components
CP -
Vectors and Resultants
CP -
Vectors and the Parallelogram Rule
NT -
Atomic Number
NT -
Beta Decay
NT -
Binding Energy
NT -
Black Holes
NT -
Electrostatic Attraction
NT -
General Relativity
NT -
Helium Balloons
NT -
Hot Springs
NT -
Hydrogen Atom
NT -
Hydrogen Fusion
NT -
Nuclear Equations
NT -
Photoelectric Effect
NT -
Radiant Energy
NT -
Radioactive Cookies
NT -
The Ax Handle
NT -
Uranium Decay
NT -
Uranium Fission
RL -
Chapter 3: Electrons
WS -
Atomic Models and Spectra
WS -
Calculating Vector Resultants
WS -
Circumference vs Diameter Lab Review
WS -
Data Analysis #1
WS -
Data Analysis #2
WS -
Data Analysis #3
WS -
Data Analysis #4
WS -
Data Analysis #5
WS -
Data Analysis #6
WS -
Data Analysis #7
WS -
Data Analysis #8
WS -
Density of a Paper Clip Lab Review
WS -
Dimensional Analysis
WS -
Energy Level Diagrams
WS -
Frames of Reference
WS -
Graphical Relationships and Curve Fitting
WS -
Indirect Measures
WS -
Lab Discussion: Inertial and Gravitational Mass
WS -
Mastery Review: Introductory Labs
WS -
Metric Conversions #1
WS -
Metric Conversions #2
WS -
Metric Conversions #3
WS -
Metric Conversions #4
WS -
Parallel Reading - The Atom
WS -
Properties of Lines #1
WS -
Properties of Lines #2
WS -
Rotational and Reflection Symmetries
WS -
Scientific Notation
WS -
Significant Figures and Scientific Notation
WS -
Standard Model: Particles and Forces
TB -
38A: Atomic Physics
TB -
Half-Life Properties
TB -
Working with Vectors
TB -
Working with Vectors
REV -
Math Pretest for Physics I
PhysicsLAB
Copyright © 1997-2022
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton