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Evan Toh
1 day ago0 min read
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Evan Toh
5 days ago0 min read
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Evan Toh
5 days ago0 min read
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Evan Toh
5 days ago0 min read
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Evan Toh
6 days ago0 min read
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Displacement-time graph and Velocity time graph of a ball thrown and comes down - Part 03
Displacement-time graph and Velocity time graph of a ball thrown and comes down When a ball is thrown up and it comes down, the motion...
Evan Toh
May 221 min read
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Displacement-time and Velocity-time graph when ball is dropped and it rebounces - with energy lost - Part 02
Displacement-time and Velocity-time graph when ball is dropped and it rebounces - with energy lost When a ball is dropped and it...
Evan Toh
May 221 min read
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Displacement-time and Velocity-time graph when ball is dropped and it rebounces (no energy lost) - Part 01
Displacement-time and Velocity-time graph when ball is dropped and it rebounces (no energy lost) When a ball dropped and then it...
Evan Toh
May 221 min read
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Light Reflection Experiment - Mirror and Pins - Determine the object distance and image distance.
Characteristics of mirror image: • virtual (an image which cannot be formed on a screen) • same size as object • laterally inverted •...
Evan Toh
May 201 min read
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Evan Toh
May 10 min read
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Evan Toh
Apr 130 min read
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Evan Toh
Mar 190 min read
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Evan Toh
Mar 20 min read
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Heating and Cooling Curves (updated)
Internal energy of a substance is the sum of kinetic energy and  potential energy of the molecules. kinetic energy  is directly...
Evan Toh
Feb 161 min read
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Orders of magnitude of sizes of atom, hair and Earth
In the syllabus, we are required to understand the orders of magntiude of various objects. Though we may no need to memorise the exact...
Evan Toh
Jan 101 min read
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Radioactivity - Questions on Penetrating Ability and Applications
2002PPQ38, 2003PPQ38, 2005PPQ37, 2006PPQ38, 2007PPQ39 Answer: Option B Answer: Option D Answer: Option B Answer: Option C Answer: Option...
Evan Toh
Nov 7, 20241 min read
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Radioactivity - Questions on mass number and proton number of the nucleus after decay
2005SPQ20, 2006PPQ40, 2005PPQ38, 2003PPQ39 Answer: Option A Answer: Option D Answer: Option B Answer: Option C Answer: Option B Answer:...
Evan Toh
Nov 7, 20241 min read
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Radioactivity - Questions on emissions through electric and magnetic field
Alpha particle is a helium nucleus which is positive charged . Beta particle is an electron which is negative charged . Gamma ray has...
Evan Toh
Nov 6, 20241 min read
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Evan Toh
Nov 6, 20240 min read
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Radioactivity - Questions on Half-life
Half-life of a radioactive nuclide is the time taken for half the nuclei of that nuclide in any sample to decay . (time taken for the...
Evan Toh
Nov 6, 20241 min read
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