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Evan Toh
Nov 30, 20230 min read
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Evan Toh
Nov 30, 20231 min read
N2007P1Q9 Pure Physics – Energy needed to pump water up a building
Answer: Option B Since water will naturally reach 40m high from the bottom of the apartment, you only need to pump the water up by a...
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Evan Toh
Nov 30, 20231 min read
Vector Diagram – Parallelogram Method for 4 different kinds of questions
For Combined Science Physics Olevel, when constructing vector diagram, a method called Parallelogram Method is commonly used....
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Evan Toh
Nov 30, 20231 min read
Double-Insulated Appliance – Air purifier in the classroom
Double-insulated appliances are common around us. The air purifiers in our classroom are one good example. In these appliances, only two...
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Evan Toh
Nov 30, 20231 min read
Kinematics Question – Using gradient and area under graph
Solutions: Option B
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Evan Toh
Nov 30, 20231 min read
PP2010P1Q23 and SP2014P1Q11 - Identifying what lens, focal length and image from 2 rays
These two questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2...
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Evan Toh
Nov 30, 20231 min read
Density (Units Conversion) and Floatation
Density is the mass per unit volume . Common units for density are g/cm3 or kg/m3 . SI unit is kg/m3 . Density of a pure substance is...
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