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Meghna Thapar 5 years, 10 months ago
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Ashmiraa Mushtaq Mohammad 6 years ago
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Naman Ahden 6 years ago
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Yogita Ingle 6 years ago
Given: l= 30cm, b= 24cm, h= 18cm
To find the maximum length of the rod We have to find its diagonal.
Length of a diagonal of a cuboidal box is=√l²+b²+h²
= √(30)²+(24)²+(18)²= √900+576+324
= √1800 = √100×9 × 2= 30√2
= 30×1.41 = 42.3cm (√2= 1.41)
The maximum length of the rod is 42.3cm
Posted by Arifa Rahman 6 years ago
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Any Khan 5 years, 11 months ago
Shalu Jain 6 years ago
Sharini Padayachi 6 years ago
Yogita Ingle 6 years ago
Red blood cells (Erythrocytes)
RBCs are the biconcave cells; also known as erythrocytes. RBCs contain the iron-rich protein called haemoglobin; give blood its red colour. RBCs are the most copious blood cell produced in bone marrows. Their main function is to transport oxygen from and to various tissues and organs.
Posted by Arifa Rahman 6 years ago
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Shalu Jain 6 years ago
Sharini Padayachi 6 years ago
Yogita Ingle 6 years ago
Stomata are microscopic pores found mostly on the underside of leaves. They are located in the epidermal tissue. Each stoma is surrounded by a pair of specialized, kidney shaped cells called guard cells, which possess chlorophyll and regulate the opening and closing of stomata. The primary function of stomata is to allow gaseous exchange during photosynthesis and respiration between the plant's internal tissues and the atmosphere. The process of transpiration also takes place through stomata.
Posted by Anurag Yadav 6 years ago
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Yogita Ingle 6 years ago
- The process of breathing is very important for carrying out life. This process is carried out through the respiratory system of the body.
- The air rich in oxygen in inhaled through the nostrils and is passed onto the nasal cavity where air is warmed and humidified by the mucus present in the nostril. The tiny hairs called ciliated epithelium filters out dust and other particles present in the air
- The nasal cavity is divided into two halves left and right by a wall of thin bone known as central septum.
- The air then passes through the windpipe also known as trachea. The trachea filters the air we inhale and branches into the bronchi.
- The trachea further divides into bronchi.
- Bronchi refers to two air tubes that carry the atmospheric air directly into the lungs.
- Lungs are the pair of main organ of the respiratory system where oxygen is taken into and carbon dioxide is expelled out. The red blood cells present in the blood absorbs the oxygen present in the oxygen rich blood in the lungs.
- They carry it and distribute it to all body cells and picks up the carbon dioxide produced by the cells.
- This gaseous exchange takes place in a tiny sac like structure present in the lungs and is known as Alveolus.
- Muscular sheets called diaphragm are also present in the chest cavity.
- The process of breathing is accompanied by the movement of diaphragm and the rib cage.
Posted by Anurag Yadav 6 years ago
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Posted by Rahul Kumar 6 years ago
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Arifa Rahman 6 years ago
Yogita Ingle 6 years ago
The Circumference (or) perimeter of a circle = 2πR
where,
R is the radius of the circle
π is the mathematical constant with an approximate (up to two decimal points) value of 3.14
Again,
Pi (π) is a special mathematical constant, it is the ratio of circumference to diameter of any circle.
where C = π D
C is the circumference of the circle
D is the diameter of the circle
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Meghna Thapar 5 years, 9 months ago
A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy. Both devices work because of electromagnetic induction, which is when a voltage is induced by a changing magnetic field.
Posted by Bhavy Pansuriya 6 years ago
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Vikash Kumar 6 years ago
Yogita Ingle 6 years ago
(i) Fission: is division, the parent cell divides into two or more cells. Fission can be of two types, namely, binary fission and multiple fission. In binary fission, the parent cell divides into two equal halves called daughter cells. During the multiple fission, the organism divides itself into numerous daughter cells.
(ii) Fragmentation: The parent body divides into two or more fragments. Later, each fragment develops into a new individual.
(iii) Regeneration: In these organisms, when the cell divides into numerous pieces, each piece proliferates and differentiates to regenerate new organisms. For example, when a lizard loses its tail, it grows a new one.
(iv) Budding: Some organisms develop buds on their body and these buds develop into a new individual, this is known as budding.
(v) Vegetative propagation: Reproduction through their vegetative parts such as leaves, roots, buds, and stems and this is known as vegetative propagation.
Posted by Kena Gandhi 6 years ago
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Yogita Ingle 6 years ago
The important centers of urbanization were temples and towns which led to the development of cities, economy, and society.
Pilgrims have huge donations to temples. This wealth was used by temples to finance their trading and banking. Some important towns were Somnath, Madurai, Triputi, Vrindavan, Ajmer, etc.
Lost wax’ technique
Lost wax technique was used to make Chola bronze statues. This technique involved several stages :
- First of all an image was made of wax. This was covered with clay and left in sun to dry.
- It was then heated and a small hole was made in the clay cover. The molten wax was drained out through this hole.
- Then molten wax was poured into the clay mould through the hole. Once the metal cooled and solidified, the clay cover was carefully removed and the image was cleaned and polished.
Posted by Prachi Loya 6 years ago
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Yogita Ingle 6 years ago
The structural & Functional unit of Kidney is ‘Nephron’
On the basis of position of nephron in to kidneys, they are of two types
1.Juxtamedullary nephrons – Their glomeruli is present in inner margin of cortex. Loop of Henle is present in medulla. Vasa recta is also present along with them
2. Cortical nephron – They are present in the renal cortex. Their loop of henle is comparitively short and its not deep into the medulla. Vasa recta is aslo absent. You can see their picture in this attachment
Posted by Prachi Loya 6 years ago
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Meghna Thapar 5 years, 10 months ago
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