Topics	Created On	Clicks	Correct	Forum
	A proven hypothesis is also known as...	09 December 2005	11057	6353
	The internal diameter of a test tube can be measured by using...	09 December 2005	8896	4865
	Which of the following elements is the most powerful oxidizing agent?	09 December 2005	7069	1578
	Matter can exist in how many states?	10 December 2005	6306	1285
	Which of the following is NOT a characteristic of air?	11 December 2005	5473	2776
	On the Fahrenheit scale, the coldest possible temperature	09 December 2005	4317	1158
	Which of the following is NOT a property of nitrogen gas?	11 December 2005	4678	1837
	Which of the following processes does NOT use oxygen gas?	11 December 2005	3667	1765
	Air balloons arefilled with helium gas rather than with hydrogen gas	11 December 2005	3451	1325
	Arsphenamine has a common name "606"	07 December 2005	3439	1275
	What is the most abundant type of atom in living things?	07 December 2005	2416	717
	How do geckos stick to walls and ceilings?	07 December 2005	2043	729
	What is "liver of sulphur"?	07 December 2005	2547	636
	What is a doubly magic nucleus?	07 December 2005	2093	834
	Which of the following metals is added to steel in lighter flints?	07 December 2005	1971	503
	Chlorine was so named because...	07 December 2005	1918	627
	Which of the following elements has the largest atoms?	07 December 2005	1820	386
	Oxygen "always" has an oxidation number of -2 except	07 December 2005	1680	581
	Which of the halogens is most abundant in nature?	07 December 2005	1577	593
	Radioactive element used in household fire detectors	07 December 2005	1465	418
	Vapors of flammable organic solvents	07 December 2005	1268	610
	Oil of Vitriol	07 December 2005	1255	486
	Sulphide mineral breaks down to its oxide and releases a gas	07 December 2005	1195	685
	Solar winds are caused by solar...	07 December 2005	1186	496
	Which of the following substances burn with red flames?	07 December 2005	1018	438
	Haematite is made up of what elements?	07 December 2005	963	368
	Metal sulphide is heated strongly in air	07 December 2005	911	450
	Expansion and contraction	07 December 2005	1232	551
	Transfer of heat by convection does not take place in .......	07 December 2005	1182	812
	The pressure at the bottom of a lake...	05 December 2005	881	506
	They will hit the Moon’s surface at virtually the same time.	05 December 2005	893	570
	Two 90-decibel sound sources are turned on at the same time	05 December 2005	807	498
	A light bulb is connected with a battery to form a simple circuit	05 December 2005	804	397
	Added to fireworks to make them brilliant red	05 December 2005	683	237
	What is the partial pressure of oxygen?	04 December 2005	558	236
	The rate-determining step in a chemical reaction	04 December 2005	559	195
	Chemical bond in a carbon monoxide molecule	04 December 2005	579	220
	In a sodium chloride lattice...	04 December 2005	490	232
	Oxidation number of chromium in chromyl chloride	04 December 2005	466	238
	A flywheel rotates with constant angular acceleration	01 December 2005	478	115
	Propanone and ethyl-ethanoate	03 December 2005	256	130
	Intermolecular Van der Waals forces	03 December 2005	301	97
	Find the height reached & the speed with which it hits the ground	01 December 2005	286	88
	A ladder is leaning against a rough vertical wall...	01 December 2005	274	127
	A light string is attached at one end to a point on a vertical wall	01 December 2005	225	79
	The block remains stationary.	01 December 2005	197	90
	The magnitude of the resultant is...	01 December 2005	213	133
	Stars vary in colour depending on their...	01 December 2005	380	203
	The hottest planet in the solar system	01 December 2005	526	277
	Asteroids are mostly found between...	01 December 2005	365	267
	Which planet has the largest canyon in the solar system?	01 December 2005	368	183
	Playground slide	28 November 2005	158	68
	The rate of evaporation of a liquid	28 November 2005	184	75
	Total area of the sole of his shoe...	28 November 2005	148	56
	A cannonball has kinetic energy...	28 November 2005	128	54
	A radio station is broadcasting at a frequency of 104.5 MHz	28 November 2005	128	67
	Telescope in normal adjustment	28 November 2005	131	69
	Kinetic theory of gases	28 November 2005	131	35
	Convex mirror better than plane mirror at blind corners	28 November 2005	131	86
	Convert to SI base units.	28 November 2005	131	81
	To prepare a solution of Pb2+ ions, we should use...	28 November 2005	216	101
	Object distance, Image distance & Focal length	28 November 2005	120	46
	Why do synthetic polymers cause environmental pollution?	28 November 2005	237	153
	The temperature of a mixture of ice and water is...	28 November 2005	134	58
	Chemistry is a study of...	28 November 2005	237	184
	Liquid pressure depends on...	28 November 2005	150	49
	Element X	28 November 2005	228	149
	Object thrown off an airplane is descending at terminal velocity	28 November 2005	105	41
	A compound of sulphur & oxygen	28 November 2005	195	148
	Graphing is an effective method of displaying experimental results	28 November 2005	104	65
	What oxide is amphoteric?	28 November 2005	213	136
	Ray of light travelling from air into a medium is refracted	28 November 2005	82	29
	The element that does NOT form a chemical bond	28 November 2005	210	145
	The volume of a gas increases	28 November 2005	80	44
	Electrochemical Series & Displacement reaction	28 November 2005	203	85
	Liquid pressure in hydraulic machines	28 November 2005	84	45
	The acidity of hydrogen bromide	28 November 2005	180	84
	Statue has to be salvaged from a ship wreck.	28 November 2005	59	26
	Copper(II) sulphate can be prepared by adding...	28 November 2005	185	80
	The ticker tape was pulled through a ticker-timer...	28 November 2005	99	37
	Fertiliser can be produced by reacting ammonia with...	28 November 2005	162	55
	Water is added to methanol	28 November 2005	187	100
	Measurement units arranged in descending order	28 November 2005	75	53
	Sodium carbonate is reacted with dilute sulphuric acid	28 November 2005	130	89
	A concave mirror has a curvature radius...	28 November 2005	66	23
	Reacts violently with cold water	28 November 2005	145	98
	The final temperature of the mixture is...	28 November 2005	66	41
	Ions with the same electronic configurations	28 November 2005	133	69
	Great Barrier Reef	28 November 2005	40	14
	The ticker tape is being pulled by a trolley...	28 November 2005	53	25
	Electrolysis of an aqueous potassium bromide solution	28 November 2005	143	81
	Which of the following is a derived unit?	28 November 2005	72	46
	What is the mass of sodium hydroxide	28 November 2005	121	77
	A ray of light strikes a plane mirror and is reflected off it.	28 November 2005	53	18
	Lead(II) nitrate solution reacts with sodium chloride solution	28 November 2005	107	58
	The temperature of a liquid	28 November 2005	60	33
	Chemical X is an acid. Which of the following about X is FALSE?	28 November 2005	121	86
	Which of the following is an electrolyte?	28 November 2005	120	85
	Which metal is soft enough to be cut using a kitchen knife?	28 November 2005	157	93
	The pressure of a gas within a container.	28 November 2005	60	29
	What is the best explanation for the stability of noble gases?	28 November 2005	124	76
	Most unlikely to form a bromide	28 November 2005	114	67
	Determine the change in potential energy	28 November 2005	41	21
	Given an element Y, its relative atomic mass is defined as...	28 November 2005	120	86
	Most suitable measurement unit	28 November 2005	60	26
	Several granules of potassium permanganate...	28 November 2005	104	64
	The following chemicals are natural products EXCEPT...	28 November 2005	106	60
	The horizontal component of a force	27 November 2005	47	16
	The coefficient of friction	27 November 2005	42	15
	Find the point on the beam where a support should be placed	27 November 2005	32	18
	What is the time when the velocity becomes zero?	27 November 2005	37	18
	Find the initial velocity of the train	27 November 2005	32	10
	What is the height of the tower?	27 November 2005	30	4
	Find where the two stones meet?	27 November 2005	27	17
	How long will it take for 50% of the lactose to be hydrolysed?	26 November 2005	89	41
	Resolve a weight in two directions	26 November 2005	28	14
	What force (assume constant) is exerted by the buffer?	25 November 2005	29	15
	What is the time taken to travel a distance of 100 m?	18 November 2005	46	29
	What is the rate when half of A had reacted?	16 October 2005	88	40
	Silver nitrate solution reacting with barium chloride solution.	19 October 2005	92	40
	The relative molecular mass of the acid is...	19 October 2005	81	39
	The ideal gas equation PV = nRT	19 October 2005	92	46
	Simple molecules held together by weak Van der Waals forces	19 October 2005	98	63
	Graphite can be used as a lubricant because...	19 October 2005	96	53
	Which of the following gases has the most kinetic energy?	19 October 2005	91	59
	What is the speed of light in vacuum?	27 October 2005	42	19
	The first 6 ionisation energies of an element...	19 October 2005	84	47
	Which of the following waves CANNOT be plane-polarised?	27 October 2005	37	16
	Which of the following compounds is the most ionic in character?	19 October 2005	96	37
	A reversible chemical reaction that is in dynamic equilibrium	19 October 2005	84	52
	Stationary wave set up in a resonant tube open at both ends	27 October 2005	32	17
	Magnesium hydroxide is soluble in aqueous ammonium chloride	19 October 2005	92	40
	Force is measured in units of...	27 October 2005	267	191
	In chemistry, what is meant by an ideal solution?	20 October 2005	90	40
	The internal energy of an ideal gas depends on...	27 October 2005	78	22
	The oxidation state of iron in K2FeO4	20 October 2005	186	87
	How many degrees of freedom?	27 October 2005	42	18
	Which enthalpy change is always negative?	20 October 2005	89	47
	The mean kinetic energy of a gas molecule at temperature T	27 October 2005	34	14
	Enthalpy changes	20 October 2005	80	46
	To measure the thickness of a piece of paper	27 October 2005	282	182
	The greatest ease to form complex ions?	20 October 2005	82	38
	The moment of inertia in rotational motion corresponds to...	27 October 2005	33	10
	The same oxidation state in all of its compounds	20 October 2005	81	38
	The moment of inertia	27 October 2005	48	18
	Stationary wave	27 October 2005	35	15
	Which of these characteristics of water is FALSE?	24 October 2005	87	52
	Which of the following is NOT the source of systematic errors?	27 October 2005	35	12
	If an object floats on the surface of a liquid,...	24 October 2005	37	27
	A vector quantity is a physical quantity which has...	27 October 2005	43	29
	The same measurement units	27 October 2005	35	6
	Located at one foci of the elliptical orbit of Mars	31 October 2005	271	85
	The apparent daily path of the Sun changes with the seasons	31 October 2005	301	184
	Earth-centered (geocentric) and Sun-centered (heliocentric) models	31 October 2005	223	124
	Slower to complete one rotation than one revolution around the Sun	31 October 2005	256	73
	A bright red supergiant star in the Orion constellation.	31 October 2005	217	87
	NOT a property of fluorescence?	06 November 2005	76	44
	Stages in a chain reaction	06 November 2005	73	43
	Which of the following is NOT a property of a catalyst?	06 November 2005	79	43
	For real gases, which of the following is TRUE?	06 November 2005	34	9
	Combustion	06 November 2005	75	49
	How much work is done by the boy?	06 November 2005	29	19
	Which compound contains Zinc, Carbon & Oxygen?	06 November 2005	110	80
	Which is the correct method to separate dyes in a mixture?	06 November 2005	81	57
	Physical property of rubber	08 November 2005	177	121
	Which of the following are the properties of metals?	08 November 2005	165	138
	What is the most logical inference?	08 November 2005	160	124
	Decreasing average distances from the Sun.	08 November 2005	188	118
	Mercury	08 November 2005	162	121
	To reach the star nearest our Sun	10 November 2005	175	67
	How long, on average, does it take sunlight to reach Pluto?	10 November 2005	346	98
	Sun’s diameter & Earth’s diameter	10 November 2005	251	81
	The measure of how close and how heavy are the particles...	15 November 2005	44	27
	The sun is primarily composed of the gases hydrogen and...	15 November 2005	191	142
	The density of ice in g/ml is...	15 November 2005	75	58
	Which is the largest planet in our solar system?	15 November 2005	170	144
	Frequency is measured in...	15 November 2005	49	17
	What is the name of the star located above the North Pole?	15 November 2005	165	109
	The first asteroid was discovered in the year...	15 November 2005	154	49
	Chemical and nuclear properties of isotopes	15 November 2005	48	28
	What is special about Sirius, the Dog Star?	15 November 2005	168	79
	What is the second full moon called?	15 November 2005	150	115
	The science that deals with the Universe beyond the Earth	15 November 2005	149	124
	Why does the shirt look blue?	15 November 2005	67	32
	Name the instrument used to measure the pressure of gases.	15 November 2005	158	118
	The branch of astronomy that studies the moon	15 November 2005	168	63
	James Chadwick bombarded beryllium-9 with alpha particles...	14 November 2005	189	81
	Which one is a symbol of a SI base unit?	14 November 2005	47	30
	If a measuring instrument is characterized as sensitive...	14 November 2005	35	21
	The following activities require work EXCEPT...	14 November 2005	30	15
	A heavy object weighs less when it is underwater because of...	14 November 2005	40	21
	Modern periodic table shows the following information EXCEPT...	14 November 2005	75	58
	What is the equation for the half-reaction at anode?	14 November 2005	78	41
	When sodium carbonate was added...	14 November 2005	74	46
	To prepare barium sulphate...	14 November 2005	99	48
	A catalyst used in the Contact Process.	14 November 2005	80	57
	Which of the following cells are NOT rechargeable?	14 November 2005	65	41
	A mercury thermometer was accidentally broken...	14 November 2005	164	94
	This is because at a higher temperature, air particles have...	14 November 2005	30	20
	The relative molecular mass of a metal oxide...	14 November 2005	63	39
	The following are properties of a transition element EXCEPT...	14 November 2005	62	48
	Given that phosphorus is in Group 15 of the Periodic Table...	14 November 2005	61	41
	The following statements about particles in a gas are TRUE EXCEPT...	14 November 2005	145	108
	The most number of molecules	14 November 2005	60	35
	What determines an element’s position in the Periodic Table?	14 November 2005	92	48
	Compound of elements from Group 13 & 17 of the Periodic Table	14 November 2005	65	42
	NOT an electrolyte.	14 November 2005	68	46
	Hydrogen bromide gas is passed through trichloromethane...	14 November 2005	57	32
	Double decomposition reaction through precipitation.	14 November 2005	59	37
	Made in industry using sulphuric acid.	14 November 2005	59	42
	The chemical formula of marble.	14 November 2005	137	86
	All elements from Group 17 of the Periodic Table...	14 November 2005	78	40
	How many times is a silicon atom heavier than a nitrogen atom?	14 November 2005	65	49
	Isotopes of the same element have the same number of...	14 November 2005	111	51
	The following processes involve a chemical reaction EXCEPT...	14 November 2005	68	45
	Group 18 elements in the Periodic Table are chemically inert...	14 November 2005	86	49
	Which of the following substances is an ionic compound?	14 November 2005	75	50
	When electrolysis is used to purify a metal...	14 November 2005	69	41
	When extra water is added to aqueous ammonia...	14 November 2005	72	45
	The following salts are soluble in water EXCEPT...	14 November 2005	76	45
	A polymer formed by using propene as the monomer.	14 November 2005	63	40
	The following statements are FALSE EXCEPT...	14 November 2005	58	36
	The following substances DO NOT contain atoms EXCEPT...	14 November 2005	71	46
	Empirical formula	14 November 2005	50	32
	Periodic Table elements ordered by increasing proton number	14 November 2005	71	36
	The following compounds are NOT covalently bonded EXCEPT...	14 November 2005	56	34
	Electrolysis of this molten salt produces a brown vapour	14 November 2005	58	34
	Radioisotopes can be used to...	14 November 2005	55	44
	When handling corrosive chemicals in laboratory, we must use...	14 November 2005	48	33
	The following is FALSE about ammonia gas EXCEPT...	14 November 2005	49	27
	Differentiate aluminium chloride solution from zinc chloride solution	14 November 2005	51	32
	Dissociates completely in water to produce hydroxide ions...	14 November 2005	50	32
	Will a charged comb attract magnets?	15 November 2005	46	26
	A nut is very tight on a screw...	15 November 2005	41	27
	When the ice melts, the water in the tub will...	15 November 2005	145	91
	Throw a stone into some soft, wet mud...	15 November 2005	29	3
	Kinetic energy	15 November 2005	19	9
	The flushing of a toilet depends on the principle of...	15 November 2005	39	11
	If light takes the path of least time between two places...	15 November 2005	18	8
	Suppose you live on the Moon...	15 November 2005	133	67
	The maximum magnification of many light microscopes...	15 November 2005	147	126
	Diffraction grating	15 November 2005	24	8
	Which type of radioactive emission is very similar to x-ray?	15 November 2005	39	29
	Carbon-14 dating	15 November 2005	13	3
	Discoverer of proton	15 November 2005	83	38
	The shape of a NH3 molecule	15 November 2005	82	45
	The same type of molecular bonding and shape?	15 November 2005	47	26
	Which metal among the following is the most reactive?	15 November 2005	51	28
	Choose the correct pairing of chemical process and its product...	15 November 2005	59	46
	IUPAC name for this organic molecule	15 November 2005	55	37
	A saturated organic molecule.	15 November 2005	54	32
	All aromatic hydrocarbons have at least one...	15 November 2005	56	36
	What is the chemical formula for the ore mineral of Galena?	15 November 2005	82	40
	Unsaturated fatty acids are characterized by...	15 November 2005	57	26
	The giant planet	31 July 2005	445	363
	The volcanic planet	31 July 2005	373	167
	Planet with retrogade moon	31 July 2005	317	85
	The ’Evening Star’ planet	31 July 2005	310	170
	Most tilted planet	31 July 2005	303	126
	Third planet from the Sun	31 July 2005	280	251
	Planet closest to the Sun	31 July 2005	277	163
	Smallest planet	31 July 2005	343	306
	Planet with lowest density	31 July 2005	2697	1312
	Average distance of Earth from the Sun	31 July 2005	508	292
	Average distance of Mercury from the Sun	31 July 2005	509	141
	Average distance of Venus from the Sun	31 July 2005	770	367
	Average distance of Mars from the Sun	31 July 2005	565	286
	Average distance of Jupiter from the Sun	31 July 2005	457	151
	Average distance of Saturn from the Sun	31 July 2005	503	151
	Average distance of Uranus from the Sun	31 July 2005	463	166
	Average distance of Neptune from the Sun	31 July 2005	410	163
	Average distance of Pluto from the Sun	31 July 2005	410	153
	Outer Planets	31 July 2005	293	156
	Non-gaseous Outer Planet	31 July 2005	238	165
	Inner Planets	31 July 2005	249	188
	Order of Planets in Solar System	31 July 2005	374	201
	Periscope Image	21 July 2005	277	198
	Natural frequency of mass-loaded spring	21 July 2005	196	114
	Coherent waves	21 July 2005	198	121
	Total electrical resistance	21 July 2005	146	76
	Electrical resistance of conductor	21 July 2005	170	82
	Electrolysis cell	25 July 2005	126	51
	Induced current	21 July 2005	147	58
	Electrolytic Product	25 July 2005	88	44
	Total Internal Reflection	21 July 2005	98	53
	Electrolysis of a molten ionic compound	25 July 2005	87	56
	Mirage	21 July 2005	109	63
	Electrolysis	25 July 2005	93	53
	Mechanical waves	21 July 2005	129	91
	Oxidation number of Bromine in a complex ion	25 July 2005	119	71
	Refractive Index, Incident Angle & Refractive Angle	21 July 2005	86	39
	Cerium (IV) Oxide	25 July 2005	102	61
	Snell’s Law	21 July 2005	117	74
	Ionization energy	25 July 2005	106	56
	Calculate refractive index from critical angle	21 July 2005	90	56
	Refractive Index and Critical Angle	21 July 2005	96	58
	Prism arrangement in periscope	21 July 2005	129	68
	Empirical Formula	25 July 2005	87	47
	Calculate Refractive Index	21 July 2005	73	18
	Deducing chemical formula from valency	25 July 2005	160	101
	Chemical bonds	25 July 2005	157	67
	Most covalent bonds	25 July 2005	91	32
	Apparent Depth & Real Depth	21 July 2005	114	62
	Wavelength and Frequency	21 July 2005	69	41
	Amplitude Modulation (AM)	21 July 2005	114	76
	Frequency Modulation (FM)	21 July 2005	110	72
	Small ion	25 July 2005	91	44
	Melting Point of Non-Metallic Oxides	25 July 2005	102	63
	Coordination Number	25 July 2005	173	73
	Partial Pressures	25 July 2005	103	41
	Volume of Gas	25 July 2005	89	38
	Melting Point & Molecular Structure	25 July 2005	106	73
	Van der Waals force	25 July 2005	111	51
	Relative molecular mass	25 July 2005	75	28
	Shape of molecule	25 July 2005	141	67
	Chemical moles	25 July 2005	129	73
	Chemical equations	23 July 2005	161	80
	Equilibrium of forces on a ramp	23 July 2005	99	39
	Logic gate with two inputs and one output	20 July 2005	58	35
	Logic gate with one input and one output	20 July 2005	63	39
	Electronic circuit	20 July 2005	72	52
	Logic circuit	20 July 2005	88	49
	Symbol of electronic gate	20 July 2005	116	55
	Electronic gate	20 July 2005	86	57
	Symbol of logic gate	20 July 2005	136	65
	AND gate + NOT gate	20 July 2005	78	50
	OR gate + NOT gate	20 July 2005	62	50
	XOR gate + NOT gate	20 July 2005	66	54
	Output is true only when both inputs are the same	20 July 2005	61	26
	Output is true only when both inputs are true	20 July 2005	55	31
	Output is false only when both inputs are false	20 July 2005	49	24
	Truth table of logic gate	20 July 2005	79	34
	Truth table	20 July 2005	62	44
	Logic gate	20 July 2005	76	29
	Calculating average speed	19 July 2005	204	82
	Calculating acceleration	19 July 2005	177	117
	’Freezing’ motion	19 July 2005	140	82
	SI Unit for momentum	19 July 2005	287	101
	Inertia and mass	19 July 2005	139	66
	Lift, Thrust, Drag and Weight	19 July 2005	133	84
	Application of Bernoulli’s Principle	19 July 2005	403	162
	Weight of submerged object	19 July 2005	138	59
	Titanic and Bernoulli's Principle	19 July 2005	140	51
	Compression of gas ...	19 July 2005	148	74
	Quantities measured in Pascal ...	19 July 2005	124	75
	Conservation of momentum	19 July 2005	111	45
	String tensions in equilibrium	19 July 2005	75	31
	Newton’s Second Law of Motion	19 July 2005	88	34
	Gas Law	19 July 2005	106	59
	Airfoil and Lift	19 July 2005	98	28
	What’s not relative in Theory of Relativity?	04 July 2005	117	58
	Focus of Albert Einstein’s General Theory of Relativity	04 July 2005	123	48
	Chemical name of water	01 July 2005	4972	2190
	Name of positive ion	01 July 2005	743	319
	Name of negative ion	01 July 2005	586	439
	Launch angle for longest projectile range	01 July 2005	131	85
	Identifying the shape of a converging lens	01 July 2005	105	46
	Definition of momentum	01 July 2005	151	89
	Determine spring constant using Hooke’s Law	30 June 2005	102	42
	Calculate Lens Power from Focal Length	30 June 2005	98	35
	Given Image Distance and Focal Length, find Object Distance	30 June 2005	69	32
	Identifying vectors and scalars	30 June 2005	155	58
	Calculate voltage of electric cell using Ohm’s Law	30 June 2005	80	40
	Total effective resistance for serial and parallel combination	30 June 2005	82	47
	What’s the electrical charge of electron?	30 June 2005	262	162
	What’s the electrical charge of proton?	30 June 2005	325	236
	Largest Mass: Neutron, Electron or Proton?	30 June 2005	347	182
	Molecular structure of diamond	30 June 2005	698	404
	Molecular structure of buckminsterfullerene	30 June 2005	495	287
	Molecular structure of allotrope graphite	30 June 2005	523	413
	Most abundant chemical element in universe	30 June 2005	672	369
	Acid inside vinegar	30 June 2005	531	308
	Chemical formula of Sulphuric Acid	30 June 2005	1343	867
	Number of protons, neutrons & electrons in a Fluorine atom	29 June 2005	889	580
	Identifying Transition Elements	29 June 2005	474	242
	Differentiating between compound and element	29 June 2005	475	339
	Indentifying process of oxidation	29 June 2005	375	168
	Effect of ethene combustion on carbon	29 June 2005	360	188
	Identifying Inorganic Compounds	29 June 2005	378	161
	A common characteristic of organic compounds	29 June 2005	565	323
	Thermometer - how it works	29 June 2005	152	83
	Why does magnifying glass work?	29 June 2005	285	139
	Float or sink?	29 June 2005	188	129
	Calculate image distance using Thin Lens Equation	29 June 2005	101	40
	Calculate spring’s length using Hooke’s Law	29 June 2005	110	41
	Effective resistance of 2 parallel resistors	28 June 2005	105	57
	Calculating voltage, resistance and current in an electrical circuit	28 June 2005	106	52
	Calculate electrical current using Ohm’s Law	28 June 2005	152	98
	Determine mass of object in a perfectly elastic impact	27 June 2005	112	32
	Neutron’s electrical charge	27 June 2005	282	192
	Molecule shaped like soccer ball	26 June 2005	837	528
	Inventor of thermometer	26 June 2005	510	253
	Faster: Sound, Light or Heat?	26 June 2005	351	275
	Sunlight’s travel time	26 June 2005	535	223
	Discoverer of Laws of Motion	26 June 2005	298	198
	Sub-atomic particles	26 June 2005	709	544