Matter in our surrounding in detail Class 9th
Matter- Any object which occupy space and have some mass is known as matter. PHYSICAL NATURE OF MATTER Matter in made-up of particles It can be seen when we break…
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Matter- Any object which occupy space and have some mass is known as matter. PHYSICAL NATURE OF MATTER Matter in made-up of particles It can be seen when we break…
MALE REPRODUCTIVE ORGANS SPERM DUCT (Vas deferens) is a narrow tube that helps to transport sperms produced in each testis. Several fluids are secreted inside this tube by different glands,…
Unpleasant, discomfort- causing sound from any source is called noise. Sustained presence of harmful, unwanted, or annoying noise in the environment is called noise pollution. We should take the following…
The outer ear that is visible to us is called pinna.The pinna collects the sound waves and directs them to the ear tube .At the end of the ear tube…
The human beings produce sound by larynx which is commonly known as voice box. The voice box is situated in the neck at the upper end of the wind pipe.…
The human eye is one of the most valuable and sensitive sense organs in the human body. STRUCTURE OF THE EYE On average, the human eye is very small, about…
The area of the edge of a knife's blade is extremely small. This creates pressure high enough for the blade to cut through a material. Syringes are used to take…
Atmospheric pressure is defined as the pressure exerted on an object by the weight of the air above it. Why do we not feel atmospheric pressure? This is because the…
The word pressure gives a mental image of something being pressed. Pressure is defined as force per unit area. The SI unit of pressure is the pascal (Pa), which is…
Like synthetic fibres, plastics are also polymers. Plastics form an important class of synthetic materials. In plastics, the arrangement of the individual units may be linear or cross linked. These…