PY105 Demos - Fall 1998

BU Physics demo room home page

Course schedule:

• section A - MWF 8 am in SCI 107 - Duffy
• section B - MWF 10 am in SCI 115 - Chasan
• section C - MWF 2 pm in SCI 107 - Carey
• section D - MW 6 pm in SCI 107 - Ludwig

Day 1 - Intro
9-4-98

• meter sticks

Day 2 - 1D motion
9-9-98

Day 3 -Constant acceleration in 1D
9-11-98

• Penny and feather 1C20.10
• Equal time / equal distance drop 1C20.20

Day 4 -Free-fall; Vectors
9-14-98

• ball to throw
• Vectors on the blackboard 1A40.30

D section

• Penny and feather 1C20.10
• Measuring g 1C30.10

Day 5 -2D motion
9-16-98

• Simultaneous fall (independence of x and y) 1D60.20 (also includes slow-motion video)
• Howitzer and tunnel 1D60.10

Day 6 -Projectile motion / Relative velocity
9-18-98

• Monkey and hunter 1D60.30
• Crossing the river 1E10.10

Day 7 -Newton's laws of motion
9-21-98

• Inertia cylinder 1F20.33
• PASCO track, cart, masses, and two springs to show the second law
• PASCO track and cart on a skateboard to show the third law

D section - Projectile motion/ Relative vel.

• Monkey and hunter 1D60.30
• Crossing the river 1E10.10

Day 8 -Forces
9-23-98

• mass and spring scale (model of elevator)
• mass, spring scale, and scale to show the normal force
• cart with pulley on inclined plane
• Blackboard force table 1J30.50
• Atwood's machine 1G10.40
• Coriolis ball on turntable 1E30.28

D section - Newton's laws of motion

• Inertia cylinder 1F20.33
• PASCO track, cart, masses, and two springs to show the second law
• PASCO track and cart on a skateboard to show the third law
• Coriolis ball on turntable 1E30.28

Day 9 -Friction
9-25-98

• Inertia balls 1F20.10
• Static vs. sliding friction 1K20.30
• Weight dependence of friction 1K20.15
• Area dependence of friction 1K20.20
• Friction blocks on incline 1K20.10

Day 10 -Uniform circular motion
9-28-98

• Ball on a string 1D50.10
• Whirligig conical pendulum 1D50.20
• Falling off the merry-go-round 1D55.30

D section - Newton's laws of motion + friction

• Box with string to break when pulled hard
• mass and spring scale (model of elevator)
• mass, spring scale, and scale to show the normal force
• Static vs. sliding friction 1K20.30
• Weight dependence of friction 1K20.15
• Area dependence of friction 1K20.20
• Friction blocks on incline 1K20.10
• Dueling truck and bulldozer

Day 11 -Uniform circular motion
9-30-98

• Falling off the merry-go-round 1D55.30
• Ball on a string 1D50.10
• Whirligig conical pendulum 1D50.20
• Pail of water 1D50.40
• Penny on a coathanger 1D50.45
• Carnival ride model 1D50.30

Day 12 -Vertical circular motion; Gravitation
10-2-98

• Rolling chain 1D50.40
• Pail of water 1D50.40
• Carnival ride model 1D50.30
• Loop-the-loop 1D50.30
• elliptical motion of a ball in a funnel

Day 13 -Review
10-5-98

• Dueling truck and bulldozer

D section - Uniform circular motion

• Pail of water 1D50.40
• Falling off the merry-go-round 1D55.30

Day 14 -Gravitation; work and energy
10-7-98

• Gravitation simulation (A section)
• ball as a prop
• ball on a string (C section)
• Slinky (C section)
• Pile driver and pop cans 1M10.25 (C section)

Day 15 - Energy
10-9-98

• Pile driver and pop cans 1M10.25
• Pulleys 1M20.10
• Lever 1M20.40
• mass on a spring

Day 16 - Conservation of energy
10-14-98

• Stretching a spring 1R10.10
• Stopped pendulum 1M40.15
• Pulleys 1M20.10
• racing balls

D section - Gravitation

• ball on a string

Day 17- Energy and power
10-16-98

• Mass on a spring 3A20.10
• PASCO cart between two springs

D section -Work and energy

• Pile driver and pop cans 1M10.25
• Stretching a spring 1R10.10
• Pulleys 1M20.10
• racing balls
• Mass on a spring 3A20.10

Day 18 - Impulse and momentum
10-19-98

• Car crashes 1N10.35
• Recoil again - collision with happy and sad balls
• Spring-apart PASCO carts 1N20.22

D section -Power; momentum

• Recoil again - collision with happy and sad balls
• PASCO carts 1N30.32
• Double ball drop 1N30.60

Day 19- Collisions
10-21-98

• Newton's cradle 1N30.10
• PASCO carts 1N30.32
• Double ball drop 1N30.60
• Astroblaster 1N30.61

Day 20- Center of mass
10-23-98

• meter stick
• Spring-apart PASCO carts 1N20.22
• Water glider 1N22.20
• Car on a rolling board 1N20.15
• Meter stick with 3 lights 1D40.10

Day 21- Rotational kinematics
10-26-98

• Car on a rolling board 1N20.15
• Bicycle wheel gyro 1Q50.24
• Wheel to spin
• Bicycle wheel to roll
• Mass on a turntable, accelerating

D section -Collisions and center of mass

• Recoil again - collision with happy and sad balls
• air track and gliders 1N30.30
• Double ball drop 1N30.60
• Car on a rolling board 1N20.15
• Meter stick with 3 lights 1D40.10

Day 22- Torque and moment of inertia
10-28-98

• Torque rod 1J40.21
• Inertia wands 1Q10.10
• Angular acceleration wheel 1Q20.20
• Adjustable angular momentum 1Q20.10

D section -Center of mass; Rotation

• George's folly - professor on platform-on-wheels
• wheel to roll
• Inertia wands 1Q10.10
• Adjustable angular momentum 1Q20.10

Day 23- Rotational kinetic energy and angular momentum
10-30-98

• Rotating platform and dumbbells 1Q40.10
• Pulling on a whirlygig 1Q40.25
• Rotating platform and bicycle wheel 1Q40.30
• Angular acceleration wheel 1Q20.20
• Racing rings, disks, and spheres 1Q10.30
• All disks roll the same 1Q10.35

Day 24- Angular momentum; Equilibrium
11-2-98

• Rotating platform and dumbbells 1Q40.10
• Pulling on the whirlygig 1Q40.25
• Rotating platform and bicycle wheel 1Q40.30
• Train on rotating platform 1Q40.40
• Torque rod 1J40.21

D section -Torque and moment of inertia

• wheel to roll
• Inertia wands 1Q10.10
• Rotating platform and dumbbells 1Q40.10
• Rotating platform and bicycle wheel 1Q40.30
• Torque rod 1J40.21
• Racing rings, disks, and spheres 1Q10.30
• All disks roll the same 1Q10.35

Day 25- Equilibrium; center of gravity
11-4-98

• Loaded beam 1J40.40
• Plumb bob method (big pig) 1J10.10
• Leaning tower of Pisa 1J11.10
• Tipping block on incline 1J11.15
• 10 nails on one 1J20.25
• Balancing bird 1J20.46

D section -Angular momentum; equilibrium

• Rotating platform and dumbbells 1Q40.10
• Rotating platform and bicycle wheel 1Q40.30
• Loaded beam 1J40.40
• Plumb bob method (big pig) 1J10.10
• Leaning tower of Pisa 1J11.10
• 10 nails on one 1J20.25
• Balancing bird 1J20.46

Day 26- Fluid statics
11-6-98

• Crush the can with vacuum pump 2B30.25
• Magdeburg hemispheres 2B30.30
• Dropping plate 2B20.20
• Pascal's vases 2B20.40
• Double syringe - model of hydraulic lift
• U-tube open tube manometer
• Weigh submerged block 2B40.10
• Weight in a boat

Day 27- Review
11-9-98

D section - Review; fluid statics

• Crush the can with vacuum pump 2B30.25
• Magdeburg hemispheres 2B30.30
• Pascal's vases 2B20.40
• Weigh submerged block 2B40.10
• Weight in a boat
• Double syringe - model of hydraulic lift
• U-tube open tube manometer

Day 28- Fluid dynamics
11-11-98

• Weigh submerged block 2B40.10
• large syringe as a model of a geyser
• beaker of water on a balance

Day 29- Bernouilli's equation
11-13-98

• Velocity of efflux 2C10.10
• U-tube open tube manometer
• Venturi tube 2C20.10
• Ball floating in airstream 2C20.30
• Funnel and ball 2C20.35
• styrofoam balls to throw
• PASCO cart with Bernoulli attachment

Day 30 - Curveballs; Simple harmonic motion
11-16-98

• styrofoam balls to throw
• PASCO cart with Bernoulli attachment
• Mass on a spring 3A20.10
• PASCO cart between springs 3A20.35
• Circular motion vs. mass on a spring 3A40.10
• Simple pendula 3A10.10

D section - Fluid dynamics; Simple harmonic motion

• Weigh submerged block 2B40.10
• beaker of water on a balance
• Venturi tube 2C20.10
• Ball floating in airstream 2C20.30
• Funnel and ball 2C20.35
• styrofoam balls to throw
• PASCO cart with Bernoulli attachment
• Mass on a spring 3A20.10
• PASCO cart between springs 3A20.35

Day 31 - Damped and driven harmonic motion
11-18-98

• Simple pendula 3A10.10
• Tacoma narrows bridge film 3A60.10
• Driven PASCO cart 3A60.20
• Barton's pendulum

D section - Simple harmonic motion

• Mass on a spring 3A20.10
• PASCO cart between springs 3A20.35
• Circular motion vs. mass on a spring 3A40.10
• Simple pendula 3A10.10

Day 32 - Thermal expansion
11-20-98

• Bimetallic strip 4A30.10
• Ball and ring 4A30.21
• Break the bolt 4A30.30

Day 33 - Gas laws
11-23-98

• Balloon in liquid nitrogen 4E10.20
• Constant volume bulb 4E30.10
• Boyle's law syringe

D section - Resonance; Thermal expansion

• Simple pendula 3A10.10
• Tacoma narrows bridge film 3A60.10
• Driven PASCO cart 3A60.20
• Barton's pendulum
• Bimetallic strip 4A30.10
• Ball and ring 4A30.21
• Break the bolt 4A30.30

Day 34 - Kinetic theory
11-30-98

• Brownian motion model 4D10.20 also diffusion

D section - Ideal gases, kinetic theory

• Brownian motion model 4D10.20 also diffusion
• Balloon in liquid nitrogen 4E10.20
• Constant volume bulb 4E30.10
• Boyle's law syringe

Day 35 -Calorimetry
12-2-98

• Water balloon heat capacity 4B50.25
• calorimetry - specific heat of lead
• Dropping lead shot 4B60.10
• Boy Scout fire starter 4B60.55

D section - Heat transfer

• Convection with rheoscopic fluid 4B20.77
• Conduction with liquid crystal indicator 4B30.53
• Two can radiation 4B40.40

Day 36 - Heat transfer
12-4-98

• Convection with rheoscopic fluid 4B20.77
• Conduction with liquid crystal indicator 4B30.53
• Thermal conductivity of styrofoam
• Diffusion with the Brownian motion model 4D10.20
• Leslie cube 4B40.30
• Two can radiation 4B40.40

Day 37 - Thermodynamics - first law
12-7-98

• Leslie cube 4B40.30
• Two can radiation 4B40.40
• Heat engine 4F30.15

D section - Heat transfer; first law

• Convection with rheoscopic fluid 4B20.77
• Two can radiation 4B40.40
• Heat engine 4F30.15

Day 38 - Heat engines
12-9-98

• Heat engine 4F30.15
• Stirling engine 4F30.10
• Thermoelectric engine

D section - Heat engines

• Heat engine 4F30.15
• Stirling engine 4F30.10
• Thermoelectric engine with liquid nitrogen

Day 39 - Entropy
12-11-98

• Thermoelectric engine with liquid nitrogen
• Entropy gumballs

Day 40 - Review
12-14-98

D section - Heat engines; entropy; review

• Thermoelectric engine with liquid nitrogen
• Entropy gumballs