Addition of Force

Addition of Force 2

Three elements of force When a force acts on an object, the object’s motion varies depending on the Three elements of force. That is the magnitude, direction, and point of action. Therefore, when displaying a force, you must indicate the … more

Circumference of a Circle

Circumference of a Circle

How to find out the circumference of a circle Let’s draw a regular polygon (inscribed polygon and circumscribed polygon) surrounding a circle. The perimeter of an inscribed polygon is less than the perimeter of the circle, and the perimeter of … more

Pythagorean Theorem

Pythagorean Theorem

Pythagorean theorem Assuming that the three sides of a right triangle are a, b, c, and the longest side is c, the Pythagorean theorem is that the equation a²+b²=c² is always true. The equation a²+b²=c² represents three squares created using … more

Flame Test Simulation

Flame Test

* This simulation take the spectral data from NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY. When heat is applied to the atoms, some electrons can have high energy levels and fall to the lower levels. Some electrons emit as much energy … more

Area of Circle

Area of Circle

How to calculate the area of a circle If you cut the circles and stick them together, they gradually become more rectangular. In this rectangle, the width is half of the circumference, and the height is the radius. Therefore, The … more

금성의 위상

Phase of Venus

Venus’ changes in phase and size are strong evidence of ‘Heliocentrism.’ Venus looks like a crescent moon or a full moon, depending on its angle to the sun. Venus is large when it looks like a crescent moon. And Venus … more

Resonance

Resonance

Resonance Resonance is a phenomenon in which the amplitude increases at a specific frequency. The resonance phenomenon can be easily observed around us. 1. Swing When you push the swing, if you push it well according to the swinging cycle, … more