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Evan Toh
Sep 301 min read
Light and sound wave diagram in different mediums with different density
Light and sound are both waves. So both carry energy from one place to another. Light , which is part of the electromagnetic spectrum,...
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Evan Toh
Aug 90 min read
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Evan Toh
Jan 11 min read
Understanding cathode-ray oscilloscope CRO
Refer to the notes below together with the video to learn more about the CRO Videos
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Evan Toh
Jan 11 min read
Kinematics graphs of ball thrown up and come down
When a ball is thrown up vertically from a height and the falls to the ground, the various kinematic graphs below shows the same motion...
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Evan Toh
Jan 11 min read
Interpreting distance-time graph and speed-time graph
Think of gradient as the steepness of a slope as you climb to the right (as time increases). 1) If it is getting steeper > increasing...
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Evan Toh
Jan 11 min read
Scalar and Vector Quantities
Scalar quantity is a quantity with magnitude but no direction. Vector quantity is a quantity with both magnitude and direction .
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Evan Toh
Jan 10 min read
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Evan Toh
Jan 10 min read
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Evan Toh
Jan 11 min read
Graphs of Transverse Wave
Transverse waves are waves in which travel perpendicular to the direction of vibration of particles.
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Evan Toh
Jan 11 min read
Fiery Re-entry into Earth’s Atmosphere
First astronauts launched by SpaceX returned home safely on 3 Aug 2020.
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Evan Toh
Dec 31, 20231 min read
Two conditions for a body to be in equilibrium
When a system is in equilibrium , 2 conditions are met. 1) Principle of Moment (POM): Sum of anticlockwise moment = Sum of clockwise...
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Evan Toh
Dec 31, 20231 min read
Why the fuse and switch must be on the live wire?
A common mistake is to state that the reason for switch to be on the live wire is “so that the switch can turn on/off the appliance”....
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Evan Toh
Dec 31, 20230 min read
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Evan Toh
Dec 31, 20230 min read
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Evan Toh
Dec 31, 20231 min read
During impact of a free falling ball, the force on ground is greater than the weight of ball
In this post, it shows a free-falling ball from a height of 1.0 m. During the impact, the direction of the force on the ground is...
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