SELECTED APPLETS - PHYS 104, Spring 2003

Last update: May 12, 2003

Chap. 1:

Motion with Constant Acceleration

Catch Up (Constant Velocity and Constant Acceleration)

Newton's Second Law Experiment

Resultant of Forces (Addition of Vectors)

Projectile Motion

Projectile Simulation/Experiment

Inclined Plane

Inclined Plane (using trigonometry)

Force and Work (Set mu = 0.)

Simulation of Monkey and Hunter Demonstration

Chap. 2:

Lever Principle

See-saw Torque (loads Macromedia Shockwave)

Center-of-Mass Motion

Locate Center of Mass of up to 20 Objects

Center of Mass of Triangle

Sliding Block and Friction

Inclined Planes and Frictional Forces

Friction: Single Block Pulled via Pulley by Falling Weight

Frictional Forces: Stacked Blocks Pulled via Pulley by Falling Weight

Friction (in HowStuffWorks)

Popular Presentation of Recent Research Results about Friction: work at Hopkins and U. Texas

From an online lecture (nice figures, overall too advanced for PHYS104)

Conservation of linear momentum: 2 balls from opposite directions

Conservation of linear momentum: 2 masses, elastic, arbitrary initial velocities

Collision of 2 wagons (by Fendt; lots of settings)

Newton's cradle

Generating angular momentum and figure skating (preliminary to next entry)

Conservation of angular momentum and figure skating (more advanced than Phys 104)

Angular momentum and tornados

Bumper cars (fun, but the collisions do not all seem to conserve angular momentum!)

Bumping cars, analyzed in terms of what happens in various collisions: TRY IT!!

Billiards simulator

Chap. 3:

Spring scale applet (alas with commentary in Korean!)

Bouncing balls

Role of inelasticity in granular medium (interesting application not in text)

General collisions

Model of a carousel: centripetal force (Fendt)

"Funderstanding" roller coasters

Design your own roller coaster

Roller coaster G-forces

Coriolus and centrifugal forces

Chap. 4:

Buoyant force in liquids (Fendt)

Buoyant force

Applet showing physical basis of ideal gas law (very enlightening)

Applet: Ideal Gas (note n [moles] x R = N [particles] x k)

Virtual Lab: Ideal Gas Law

Interactive periodic table

Venturi tube simulation for Bernoulli equation (fancy)

Chap. 5:

Reynolds number calculator

Fancy flow applet using Reynolds number

Teaching Fluid Dynamics over the Internet

Water hammer applet (very technical)

Baseball hits, including effect of Magnus force

Frisbee tutorial

NASA Beginner's Guide to Aeronautics

Airplane lift is as subtle and complicated as the text describes: here are problems with 3 simple pictures often presented in popular discussions:

Longer path or equal transit theory

Skipping stone theory

Venturi theory

More useful discussions:

What is lift?

What is drag?

Bernoulli's equation

Lift is generated by turning a moving fluid

Reynolds and Mach numbers

Computes final velocity based on initial and payload masses and on propellant exhaust speed and includes link to derivation of the rocket equation (which is well beyond the level of PHYS 104)

Multistage rockets as spring-loaded

Details on mass fraction for rockets

How rocket engines work (from How Stuff Works)

Chap. 6:

Discussion of heat transfer (somewhat more technical than class)

Primer tutorial on electromagnetic waves (nicely captures the essence; if you are unfamiliar with waves, study this site!)

Tutorial on waves (if you want more information; following links takes you astray)

Black-body radiation applet (shows power as well as intensity vs. wavelength)

Black-body radiation applet (very nice, flexible, convenient)

Black-body radiation applet (plots log (intensity) vs. wavelength; input T or wavelength of max intensity)

Succinct discussion of black-body radiation (with some formalism and quantum concepts you can skip over)

Radiation discussion, including links to astronomy data, graph, link

Black-body radiation applet (cludgy but potentially useful for extracting numbers)

Excellent general description of light bulbs without equations or charts

GE glossary of terms (Note esp. lumens/watt)

Watts and lumens: definitions and clarification of essentials

Light voltage regulator (scroll down for great table showing sensitivity of lifetime and lumens to voltage)

Popular description of lightbulbs of various types

Simulation illustrating the 2nd law of thermodynamics, with lots of accompanying discussion; also shows energy conversion to thermal energy for a bouncing ball

Brief discussion of entropy

Extensive but non-technical discussion of entropy

Extensive discussion of entropy clarifying misconceptions

"All about entropy" with lots of links, likely more than you want to know!

Second law of thermo and Heat engine [ideal] and real, nice web introduction

Entropy and biology descriptive

Entropy illustrated with poker and with a box of air

How refrigerators work (Follow first few links; from HowStuffWorks)

Parts of a refrigerator

Refrigeration cycle

How an airconditioner works (from HowStuffWorks)

Carnot cycle and the efficiency of engines (& 2-stroke)

Gasoline engine: Otto cycle simulation (4-stroke: induction, compression, power, exhaust)

Chap. 8:

Electrostatics (P. Falstad)

Electrostatics (P. Falstad, 2D)

Electric field lines from 2 charges

Chap. 9:

Induced current by distorting coil

How Power Distribution Grids Work (from How Stuff Works)

How Tape Recorders Work (from How Stuff Works)

Chap. 11:

RLC Resonance Circuit, I vs. f

Simple AC circuits, R, L, C (Fendt)

Electromagnetic spectrum, elementary treatment

Electromagnetic spectrum, inc. jpeg, from NCSA, U of Illinois

Electromagnetic spectrum, succinct table

"The Nature of Light", succinct summary

Assignment in USA of all frequencies of the electromagnetic spectrum (pdf)

Applet showing amplitude modulation (Note that "mod index" is the amplitude of the modulator. Ignore the lower set of green spikes.)

Applet showing frequency modulation (Similar to the preceding. To see anything, "mod index" must be at least half way up. Ignore the lower set of black spikes.)

How Radio Works (from How Stuff Works)

How Television Works (from How Stuff Works)

Charged Particles Moving in a Magnetic Field

Simple applet on additive color mixing with R, G, B slide bars (alternative site) (similar idea)

Succinct discussion of additive (RGB) color addition

Color mixing (additive) [Hwang]

Video recorders, types

VCR tips

"Dilletante's dictionary" of audio terminology

Maarten Rutgers' web site (then click on Fun, then Microwaves)

Parts of a microwave oven

Bloomfield microwave-oven FAQs (and not-so-frequently asked questions)

How Microwave Ovens Work (from How Stuff Works)

Chladni Figures and Vibrating Plates

Microwave-oven experiments: an extensive, wonderful set

Extensive set of Q&As by Bloomfield on microwave ovens

Radiation From A Quarter Wave Antenna: Figs. 68 & 69 at end

Antennas: descriptions of various kinds, inc. quarter-wave

Chap. 12:

Refraction (moving wavefronts)

Reflection/Refraction (beams)

Refraction/reflection (single wavefront to "antennas" on interface--Huygens)

Light Dispersion through a Glass Prism

Nice, clear discussion of rainbows

Physics of rainbows (more than you probably want!)

Several pages on rainbows and why they arise

Extensive information about rainbows, not just physics

Constructive and destructive interference (static)

Adding pair of sinusoidal waves (static)--shows nodes and antinodes well

Superposition of wave forms traveling in opposite directions

Superposition of sinusoidal wave pulses traveling in opposite directions

Superposition of user-modified sinusoidal wave pulses traveling in opposite directions

Superposition of extended waves traveling in opposite directions (from NTNU)

Thin-film applet

Polarizing filter (nice applet)

Polarization of plane wave

FAQs re Gas Discharge Lamps, Ballasts, and Fixtures (more technical than PHYS104!)

Absorption and emission of radiation by an atom

Beginning of fluorescent bulbs sites (How Stuff Works)

Emission of photon from atom due to collision

Essence of fluorescent lamps -- READ THIS!!

Difference between current flow in conductors and plasmas

Starting the lamp--traditional method

Starting the lamp--modern rapid method

Role of ballast in smoothing current

Succinct popular-level blurb on compact fluorescent bulbs (by a physicist at Iowa State)

Excellent discussion of incandescent and fluorescent bulbs (inc. failure of fluorescents)

The Laser (excellent and widely linked)

WWSR Laser tutorial (first of 5 excellent linked pages)

Operation of a Laser System - Interactive Applets

"Laser Adventure " by Rami Ariel, Kansas State U, much at PHYS104 level, sometimes too detailed and mathy

Stimulated Emission

Properties of Laser Radiation-concise summary

Figure re electron population in thermal equilibrium

Normal/Inversion Population Applet (more cute than useful?)

Article on lunar laser ranging (research rather popular, so just read the abstract, and perhaps look at the figures)

Chap. 13:

Image Formation by a Converging Lens (Kiselev)

Thin lens demo (Fu-Kwun Hwang), several sites: utb, nau, colorado

Magnification applet

Pinhole photography homepage with lots of links (and ads)

Compendium of lens calculator sites

Lens info

Glossary of Photographic Terms

Photography basics (9 pages)

Depth of Field Explained

Discussion of depth of field

Nice discussion of depth of field and other basics

Depth-of-Field calculation applet

Depth of Field Calculators for Photographers and lots of info

Digital Photography vs Traditional Photography: exposure control (nice summary)

f/ calc (slow loading)

Bob Wheeler's photography

How Cameras Work (intro page of several on HowStuffWorks)

How Photograph Film Work (intro page of several on HowStuffWorks)

Nice clear tutorial on binary notation <-------

Binary numbers and analog/digital conversion <-------

How CDs Work (intro page of several on HowStuffWorks)

How CD Burners Work (intro page of several on HowStuffWorks)

How DVDs and DVD Players Work (intro page of several on HowStuffWorks)

Total Internal Reflection

Optical fibers--resources

Chap. 14:

Excellent applet on decay and half-life

Another nice simulation of half-life and decay

Nice applet on nuclear chain reaction

Applet on Nuclear Isotope Half-lifes

Brief tutorial on nuclear chemistry

Radiation: several nice short summaries

How CAT Scans Work (How Stuff Works)

How MRI Works (How Stuff Works)

Physics Saves Lives (AIP "Propaganda")

Compendium of sites on medical physics

Miscellaneous compendiums:

Bloomfield compendium of questions and answers on How Things Work

Sports physics--vast collection of fascinating links

General physics aimed at biology

Iowa Science Teachers

APS superset

Kiselev site

U. of Maryland HAMLET Applets


UNCW collection

PHYS 111 sites

R. S. Reddy's General Physics Java Applets

Mississippi State Simulation Library



Avon School compendium


Conservation of linear momentum: cannon ball into box car (inelastic)

Conservation of linear momentum: 2 masses, arbitrary restitution, arbitrary initial velocities

Good Physics Applets, Evaluated by Donald F. Collins, Warren Wilson College

Sussex collection

Nano, Quantum & Statistical Mechanics & Thermodynamics Educational Sites

MSU physics applet collection

San Jose State physics web resources

Tutorials on computer components

Comic relief:

How to Tell if You Are a Physics Major

Physics limericks