PHY ICS - The Institute of Physics in Ireland

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16 P H Y S I C S O N S T A G E 2 Forces Use kebab sticks and blue tack to assemble this demonstration. Candles will oscillate when lit demonstrating balance. Balancing cola cans Cola can balances on it’s side when filled sufficiently with liquid.
The paperclip and the falling teacup SWEDEN: Per Olaf Nilsson F O R C E S Take about 1.5 metre of string. Tie one end to the handle of a (cheap) teacup and the other to an ordinary paperclip. Hold a pencil horizontally in one hand – at shoulder height. Hold the paperclip in the other hand and draw the string across the pencil until the cup is hanging about 1.5 metres above the floor. (A soft mat under the cup is reassuring while you practice this.) Ask your students to predict what will happen if you release the paperclip. Let go. We usually ended up with at least three turns of string around the pencil and we haven’t broken the cup yet – but imagine the delight of our students if we do! This may lead to a discussion about angular momentum. As the radius of the paperclip’s rotation about the pencil decreases, what happens to its angular velocity? 17
Page 1: PHY ICS on Stage 2 & 3 on Stage 2 &
Page 4 and 5: Foreword It is a pleasure to introd
Page 7 and 8: PHYSICS ON P R ESTAGE S S U R 2E Ph
Page 9 and 10: 1 2 3 4 5 6 7 8 CP OR NE ST SE UN R
Page 11 and 12: I N T R O D U C T I O N v The Irish
Page 13 and 14: P R E S S U R E Demonstration of at
Page 15 and 16: Bernoulli effect 1: ping-pong ball
Page 17 and 18: The Bernoulli effect 3: the slipstr
Page 19 and 20: The atmospheric karate chop IRELAND
Page 21 and 22: P R E S S U R E 9 ‘Heron’s Foun
Page 23 and 24: Newton’s third law For every acti
Page 25 and 26: To show air has mass SPAIN: ‘Teac
Page 27: Surface tension - ‘water-knot’
Page 31 and 32: The inclined plane This apparatus c
Page 33 and 34: F O R C E S To show that vertical a
Page 35 and 36: D E N S I T Y To demonstrate the ef
Page 37 and 38: The sinking orange IRELAND: The ora
Page 39 and 40: The boat and ball IRELAND: The boat
Page 41 and 42: Submarine model to demonstrate dens
Page 43 and 44: The balloon that doesn’t burst SP
Page 45 and 46: WAVES & SOUND Jenga Blocks: to show
Page 47 and 48: To show sound is a waveform GREECE:
Page 49 and 50: Diffraction using fingers IRELAND:
Page 51 and 52: EASY COLOUR 2: Colour mixing - all
Page 53 and 54: L I G H T EASY COLOUR 4. Red light
Page 55 and 56: Estimating the speed of light from
Page 57 and 58: Geometric optics with a laser point
Page 59 and 60: E L E C T R I C I T Y & M A G N E T
Page 61 and 62: M I S C E L L A N E O U S Gedanken
Page 63 and 64: Can you pick up a cube of ice with
Page 65 and 66: Electroless plating Background Elec
Page 67 and 68: M I S C E L L A N E O U S Some exce
Page 69 and 70: Answers to thought experiments with
Page 71 and 72: Demonstrations and teaching ideas s
Page 73 and 74: PHYSICS ON STAGE 3 Team and contrib
Page 75 and 76: PHYSICS ON STAGE 3: The conference
Page 77 and 78: PHYSICS ON STAGE 3: Acknowledgement
Page 79 and 80:
2 pressure Can you feel the force?
Page 81 and 82:
4 pressure Pressure with a differen
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6 forces Water rocket Austria Break
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8 forces Has Newton’s Law gone wr
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10 forces Can you balance six nails
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12 forces Anyone for tennis? Belgiu
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14 forces Which syringe is easiest
Page 93 and 94:
16 forces Soap bubbles and films: 2
Page 95 and 96:
18 forces Moments on a wheel The Cz
Page 97 and 98:
20 density The mystery of the vanis
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22 heat Making a turbine from a pla
Page 101 and 102:
24 waves & sound Standing waves in
Page 103 and 104:
26 waves & sound Kundt’s tube Lux
Page 105 and 106:
28 light Which one is the tonic wat
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30 light Real depth and apparent de
Page 109 and 110:
32 light Disappearing crystals Irel
Page 111 and 112:
34 light How to make a wooden mirro
Page 113 and 114:
36 light Investigating colour Irela
Page 115 and 116:
38 light Hot headlamps The Czech Re
Page 117 and 118:
40 light Words in a tube The Czech
Page 119 and 120:
42 light How the eye works, continu
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Page 123 and 124:
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48 electricity & magnetism The elec
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50 electricity & magnetism Seeing a
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52 electricity & magnetism The Darl
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54 miscellaneous Bottle race Belgiu
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56 miscellaneous The Coriolis effec
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PHY ICS - The Institute of Physics in Ireland

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