"Motion" What is Definition of Motion and How it's Work ?

Definition of Motion   When the earth rotates, all objects on the earth's surface also rotate. Tree and houses which look standing still also rotate. However, they are considered to be unmovable. Why so?  A rider rides on the highway. In this case, the man is considered to be movable....

Read More

Dimension of Derivative Quantities and Additional Quantities in Physics

Dimension Dimension of a quantity is a relation between that quantity and base quantities. Dimension of quantities shows how the quantities are arranged upon the base quantities. In physics, there are seven base quantities and that have dimension and two additional quantities that do not have dimension. However all of derivative quantities have dimension. The dimension of derivative quantities...

Read More

Using Tenfold Numbers in Mathematics and Physics

Nowadays, there are two system of units that people are usually used to; there are metric system and British system. Metric system is divided into two, they are CGS (centimeter, gram, and second) and MKS (meer, kilogram, and second). Example of British system of unit are pound, feet, and inch. System International (SI) of unit  basically derived from metric system. Therefore, system international...

Read More

Significant Figures : Addition, Substraction, Multiplication and Division of Significant Figures

Significant Figures   1. Addition and Substraction of Significant Figures   The result  of addition and substraction has only in questionable (quesstimate). If the entire numbers are not underlined, the last is the number in questionable. For example : Sampel 1 25300 g  (the 3 is in questionable)   4140 g  (the 0 is in questionable) ______+ 29440    ...

Read More

Round Numbers Rules : How to Write Round Numbers ?

Round Numbers Rules Sometimes, measurements in physics result non-integer numbers. Hence, it is more practice and easier the counting process if the numbers resulting from the measurements is rounded. The rules of the rounding are as follows : 1) The number that is bigger than 5 is rounded up. For...

Read More

Significant Figures Rules - How to Write Significant Figures ?

Significant Figures Overview Significant Figures   Physics experiment cannot be separated from the numbers of measurement result. Most of the measurement result are in the form of fraction numbers (it is not integer). For example, when you are measuring a book you obtain the length of 29.7...

Read More

How to Use and Read Ruler, Vernier Caliper and Micrometer Caliper ? - Length Measurement

Length Measurement To measeure the length of a thing, you can use ruller, roll metre (pedometer), vernier caliper, or micrometer caliper. Can all of tools of length measurement be used to measure anything ? For example to measure the diameter of a wire can you use a ruler and to measure a length...

Read More

Error of Measuring ? 5 Aspect of Measurement

Overview Error of Measuring When observing or measuring something, it's very common if there is an error measuring. It can happened because of the influence of internal factor or external factor. Internal factor is factor comes from the observer. In addition external factor is factor comes from...

Read More