Reaction of metals with water Reaction of metals with water produces metal oxide and hydrogen gas. The metal oxides dissolves in excess of water forming metal hydroxides. Since heat is released during reaction therefore the reaction is exothermic. Metal + Water → Metal oxide + Hydrogen Metal oxide + Water → Metal hydroxide + Heat […]
Author Archives: LearnFatafat
Ultrasound
Ultrasound or ultrasonic waves are the sounds with frequency above 20000 Hz. However, humans cannot hear or produce ultrasound but animals like dolphins, bats and porpoises can produce it. Also, moths can hear ultrasound produced by bats, which helps them to escape from capture of bat. Application of ultrasound It has many application like cleaning […]
SONAR Technique
SONAR stands for SOund Navigation And Ranging. This technique is also known as Echo Ranging. Working of SONAR SONAR techniques involves a transmitter and receiver. Whole system is placed in ship. Transmitter produces ultrasonic waves or ultrasound . These waves are transmitted to water. Waves travels through water and and strikes to the object under […]
What is Physics?
Introduction to Physics Physics is the study of basic laws of nature and their expression in different natural phenomena. For instance, Newton studied the fall of apple to the ground, and formulated, the “ Laws of Gravitation ”. This law helped to explain different natural phenomena like why things do not escape in space on […]
Reaction of Metals with Oxygen
The physical properties are insufficient to identify if a substance is metal or a nonmetal and so there is need to test chemical properties of metal and non-metal . Lets start with reaction of metals with oxygen. Metal react with oxygen to form metal Oxide Metal + Oxygen → Metal Oxide 4K + O2 → […]
Complex Permanent Tissue in Plants
Introduction to Complex Permanent Tissue Simple permanent tissue and complex permanent tissue are formed when meristematic tissue lose their ability to divide and redivide after some extent. Complex permanent tissue contains different types of cells . It is classified into two types which are xylem and phloem. Thus, the two complex permanent tissue xylem and […]
Simple Permanent Tissue in Plants
Introduction to Simple Permanent Tissue Simple permanent tissue and complex permanent tissue are formed when meristematic tissue lose their ability to divide after an extent. Simple permanent tissue is classified into parenchyma, collenchyma & sclerenchyma tissue. Parenchyma This type of simple permanent tissue cells are alive, thin walled, loosely held and possess large intercellular spaces. […]
Structure and Functions of Human Eye
Human eye is most important sense organ in the body. It provides us with vision thereby, allowing us to see this beautiful world. Human eye is like a camera. As compared to camera, human eye takes in the light and forms the image. Human eye consist of eyeball, cornea, a crystalline lens , pupil, iris, […]
What is Projectile Motion?
Have you ever observed that, When you kick a football it travels in a curved path. The particle that travels the curved path is called the projectile. The motion of projectile is called Projectile motion. The motion of the particle can be studied separately for horizontal and vertical parts. The point of projection is taken […]
Meristematic Tissue in Plants
Tissues are group of cells that perform same functions. Thus, tissues are classified in two types plant tissue and animal tissue . Plant tissue are classified into meristematic tissue, simple permanent tissue and complex permanent tissue . Meristematic tissue It is responsible for growth of plant. Meristematic tissue has the ability to divide and redivide […]