earth | The wobbly earth |

| The earth and moon get a divorce |

earthquake | Mechanical work done in an earthquake |

| Collapse of the Nimitz Freeway in an earthquake |

eBook | Editorial |

eclipse | Gravity bending light |

editorial | Editorial |

Einstein | Mass Into Energy |

| Relativity |

| Albert Einstein |

electric field | Superposition of electric fields |

| Summary - Fields |

| The Electric Field |

| Dipoles |

| Voltage related to electric field |

| Discussion Questions - Electric Fields |

electrical circuit | Summary - Electricity |

electrical energy | Potential Energy |

electrical force | The Quest for the Atomic Force |

electricity | Summary - Electricity |

electromagnetic waves | Electromagnetic Waves |

electron | The Electron |

| Summary - Atom |

electron spin | Electron Spin |

electron-positron annihilation | Electron-positron annihilation |

elephant | The wavelength of an elephant |

elevator | An Elevator |

elongation of springs | Objects Under Strain |

emission of electrons | Emission of electrons in a cathode ray tube |

energy | Energy |

| Kinetic Energy |

| Force, Energy, and Power |

| Summary - Energy |

| Simplifying the Energy Zoo |

| All Energy is Potential or Kinetic |

| The concept of work |

| Efficiency and grades of energy |

| Energy and Relative Motion |

| How new forms of energy are discovered |

| Energy stored in a battery |

| Energy stored in a capacitor |

energy concept | Summary - Energy Concept |

energy conversion | Converting one form of energy to another |

energy equivalent | A rusting nail |

energy in fields | Calculating Energy in Fields |

energy level | Energies of States in Hydrogen |

energy of a vibration | Summary - Energy in Vibrations |

entropy | Entropy |

| Entropy increases in heat conduction |

| A book sliding to a stop |

| Using a refrigerator to decrease entropy? |

| Entropy and evolution |

Ernest Rutherford | The Planetary Model of the Atom |

ether | The Principle of Relativity |

evolution | Entropy and evolution |

example | Energy released by a comet impact |

| Converting kilowatt-hours to joules |

| Human wattage |

| Conservation of mass |

| Converting one form of energy to another |

| Heating a swimming pool |

| Irish coffee |

| You take the high road and I’ll take the low road |

| Dropping a rock |

| Gravitational PE converted directly into heat |

| Mechanical work done in an earthquake |

| Pushing a broom |

| A violin |

| Energy production in the sun |

| A toy gun |

| Gravitational potential energy |

| An ice skater pushing off from a wall |

| Absorbing an impact without recoiling? |

| Dragging a refrigerator at constant velocity |

| Accelerating a cart |

| A Cannon |

| Ion Drive for Propelling a Spacecraft |

| The Tail of a Comet |

| A Spinning Top |

| Momentum and kinetic energy in firing a rifle |

| The wobbly earth |

| The earth and moon get a divorce |

| Momentum and kinetic energy of a glacier |

| Q of a stereo speaker |

| Getting rear-ended |

| Pool balls colliding head-on |

| A collision of pool balls viewed in the c.m. frame |

| The slingshot effect |

| Walking into a lamppost |

| Ion drive for spacecraft |

| A toppling box |

| An explosion |

| The bola |

| A two-car crash with sticking |

| Shooting pool |

| A Turbine |

| A figure skater pulls her arms in |

| Changing the axis |

| Earth’s slowing rotation and the receding moon |

| Colliding asteroids described with different axes |

| A system with its center of mass at rest |

| Angular momentum of a rigid object |

| How torque depends on the direction of the force |

| Gravitational torque on an outstretched arm |

| A flagpole |

| Art! |

| An application of calculus |

| Pressure in U.S. units |

| Atmospheric pressure in U.S. and metric units |

| Getting killed by a pool pump |

| Pressure of lava underneath a volcano |

| Atmospheric pressure |

| Which temperature scale to use |

| Volume related to temperature |

| Pressure in a car tire |

| Earth’s senescence |

| A piston, a refrigerator, and a space suit |

| Entropy is additive |

| Entropy isn’t changed by a Carnot engine |

| Entropy increases in heat conduction |

| Entropy is increased by a non-Carnot engine |

| A book sliding to a stop |

| Using a refrigerator to decrease entropy? |

| Maxwell’s daemon |

| Entropy and evolution |

| The heat death of the universe |

| Hawking radiation |

| A carnival game |

| Period and frequency of a fly’s wing-beats |

| Frequency of a radio station |

| The pendulum |

| The moons of Jupiter. |

| Water in a U-tube |

| The range of energies of sound waves |

| Exponential decay in a trumpet |

| Ions moving across a cell membrane |

| An opera singer breaking a wineglass |

| Collapse of the Nimitz Freeway in an earthquake |

| Collapse of the Tacoma Narrows Bridge |

| Emission and absorption of light waves by atoms |

| Piano strings ringing in sympathy with a sung note |

| Changing the pitch of a wind instrument |

| Decay of a saxophone tone |

| Q of a radio receiver |

| Q of a stereo speaker |

| Nuclear magnetic resonance |

| Hull speed |

| Wavelength of radio waves |

| Doppler-shifted sound from a race car |

| Doppler shift of the light emitted by a race car |

| Fish have internal ears |

| Whale songs traveling long distances |

| Long-distance radio communication |

| Soundproofing |

| Radio transmission |

| A magnetic compass |

| A television tube |

| Flow of electrical charge in wires |

| Flow of electrical charge across cell membranes |

| Emission of electrons in a cathode ray tube |

| Decay of Pb-212 |

| A reaction occurring in the sun |

| Number of photons emitted by a lightbulb per second |

| Number of electrons flowing through a lightbulb |

| Energy stored in a battery |

| Units of volt-amps |

| Power dissipated by a battery and bulb |

| Resistance of a lightbulb |

| Two lamps on the same household circuit |

| Three resistors in parallel |

| An arbitrary number of identical resistors in parallel |

| Dependence of resistance on cross-sectional area |

| Incorrect readings from a voltmeter |

| Getting killed by your ammeter |

| Dependence of resistance on length |

| More than two equal resistances in series |

| Two lightbulbs in series |

| Choice of high voltage for power lines |

| A charged balloon |

| ATLAS accelerator |

| Gravitational field of the earth |

| Reduction in gravity on Io due to Jupiter’s gravity |

| Superposition of electric fields |

| Dipole moment of a molecule of NaCl gas |

| Field generated by an electric eel |

| Relating the units of electric field and voltage |

| Voltage associated with a point charge |

| Field of a uniformly charged rod |

| Hallucinations during an MRI scan |

| The generator |

| The transformer |

| Getting killed by a solenoid |

| Energy stored in a capacitor |

| Potential energy of a pair of opposite charges |

| Energy in an electromagnetic wave |

| An alternative optical test |

| A Searchlight |

| Diopters |

| A flat mirror |

| An anti-shoplifting mirror |

| A shortcut for real images |

| Snell's Law |

| Ocean waves near and far from shore |

| Double-slit diffraction of blue and red light |

| The correspondence principle |

| Spacing of the fringes at small angles |

| Gravity bending light |

| Black holes |

| A rusting nail |

| Electron-positron annihilation |

| KE compared to mass equivalent at low speeds |

| The correspondence principle for mass-energy |

| Looking for tall basketball players |

| C Dating |

| Radioactive contamination at Chernobyl |

| The hot potato |

| Probability distribution for radioactive decay |

| Average lifetime |

| Sample Example |

| Momentum of a photon |

| A microwave oven |

| What is the proportionality constant? |

| The wavelength of an elephant |

| The typical wavelength of an electron |

| Spectra of thin gases |

| The stability of atoms |

| Chemical bonds in hydrogen molecules |

| An estimate for electrons in atoms |

| A book lying on a table |

| Pushing a box up a hill |

| A barge |

| Rappelling |

| A pulley |

| An Elevator |

| Terminal velocity for falling objects |

| A passenger riding the subway |

| Forces on a sailboat |

| A car crash |

| An accelerating bus |

| Weight and mass |

| Calculating terminal velocity |

| Finding final speed, given time |

| Extracting acceleration from a graph |

| Converting g to different units |

| Numerical calculation of a negative acceleration |

| Acceleration with a change in direction of motion |

| A skydiver |

| Saving an old lady |

| The units of G |

| Newton’s third law |

| Pluto and Charon |

| Force required to turn on a bike |

| Don’t hug the center line on a curve! |

| Acceleration related to radius and period of rotation |

| A clothes dryer |

| More about clothes dryers! |

| Slow down before a turn, not during it |

| Velocity vectors in relative motion |

| Rappelling |

| The galloping horse |

| A component of a force vector |

| Pushing a block up a ramp |

| The second derivative of a vector |

| The integral of a vector |

| A fire-extinguisher stunt on ice |

| Order of addition |

| Finding the magnitude and angle from the components |

| Finding the components from the magnitude and angle |

| Negative components |

| Adding components |

| LA to Vegas, graphically |

| A car going over a cliff |

| Forces in perpendicular directions on the same object |

| The center of mass as an average |

| Velocity in the x-t graph |

| Scaling of the area of a triangle |

| Scaling of the volume of a sphere |

| Scaling of a more complex shape |

| Cost of transporting tomatoes |

| Rain falling into a moving cart |

exercise | Exercise: Torque |

| Exercise: Vibration |

| Exercise: Worksheet on Resonance |

| Object and Image Distances |

| How strong are your glasses? |

exercises | Homework Problems - Conservation of Energy |

| Homework Problems |

| Homework Problems |

| Homework Problems |

| Homework Problems |

| Homework Problems |

| Homework problems |

| Homework problems |

| Homework problems |

| Homework problems |

| Homework problems |

| Homework problems |

| Homework Problems 2 |

| Homework Problems 1 |

| Homework problems |

| Homework problems |

expansion of universe | Evidence for Repulsive Gravity |

experiment | The Scientific Method |

explosion | An explosion |

exponential notation | Scientific Notation |

eye | Eyes and Sight |

| Refraction and the Eye |

| Discussion - Refraction and Images |

eyeglasses | How strong are your glasses? |