Concrete is the most common artificial composite material of all and typically consists of loose stones (aggregate) held with a matrix of cement. Concrete is a very robust material, much more robust than cement, and will not compress or shatter even under quite a large compressive force.
2) Y-axis contains absolute brightness Why do astronomers use the H-R Diagram? Astronomers use H-R Diagrams to classify stars and to understand how stars change over time.
Brightness adjustment dial. instaxÂ® mini 8 automatically determines the best brightness for taking a picture, and informs you of the suitable setting by lighting the corresponding lamp. Turn the brightness adjustment dial to the position (mark) of the lit lamp.