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Ask QuestionPosted by Noddy Chak 5 years, 10 months ago
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Posted by Anil Kumar 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
The human respiratory system has the following parts:
i. Kidney: The kidneys filter the wastes which is flushed out of the body as urine and excreta.
ii. Ureter: The ureters transfer liquid waste from the kidneys into the urinary bladder.
iii. Urinary Bladder: The urinary bladder stores the urine until it is finally discharged from the body.
iv. Urethra: The urethra is a carrier of semen (in males) as well as urine for the ultimate discharge out of the body.
Posted by Ritika Garg 5 years, 10 months ago
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Meghna Thapar 5 years, 6 months ago
Disadvantages
Impacts Air Quality
Sewage sludge incineration may impact the surrounding air quality. Combustion of waste materials may result in the production of fine inhalable particles laced with toxic metals. Research has shown that about 78 – 98% of Cadmium (Cd), Chromium (Cr), Copper (Cu), Nickel (Ni), Lead (Pb) and Zinc (Zn) remain in the ash. Fly ash are usually controlled via wet scrubbers, electrostatic precipitators, and bag filters.
Release of Dioxins
Sewage sludges may contain significant concentrations of hazardous metals, depending on their origin and the wastewater treatment. These toxic substances can result from incomplete combustion by using deficient technology or operating the incinerator incorrectly. Dioxins are carcinogenic and a serious public health threat.
Mercury Contamination
Mercury that results from incinerating waste occurs mainly via fly ash, bottom ash and filter cake. Almost all mercury compounds are hazardous even at very low concentrations in both aquatic and terrestrial ecosystems.
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Yogita Ingle 5 years, 10 months ago
Kidneys are bean-shaped structures located on either side of the backbone and are protected by the ribs and muscles of the back. Each human adult kidney has a length of 10-12 cm, a width of 5-7 cm and weighs around 120-170g.
The kidneys have an inner concave structure. At the centre, there is a notch called hilum through which the blood vessels and nerves enter the organ. Towards the inner surface of the hilum, there is a large funnel-shaped space called renal pelvis with projections called calyces.
Karamveer Singh 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
The trees in the forests are of different shapes and heights. The branching part of the tree above the stem is called its crown. It is formed of branches and leaves. These crowns are of different types and sizes and form horizontal layers in the forests. The trees that are not as tall as canopy trees, form different layers or tiers under the canopy are called understoreys.
Posted by تبارك رضا 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
Hydrated salt contains water of crystallisation to complete its structure. When a hydrated salt looses its water of crystallisation, it becomes an anhydrous salt.
Example: On strong heating copper sulphate crystals lose all the water of crystallisation and form anhydrous copper sulphate.
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Meghna Thapar 5 years, 10 months ago
The lens which is thinner in the middle than at edges is called concave lens.
Posted by Salim Deshmukh 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
We can conserve the water in many ways. Some of them are:
- Turning off the taps while brushing our teeth and shaving.
- Repairing immediately the leaking taps.
- Not leaving the water running for rinsing while washing the dishes.
- Do not wash the vegetables under running water. Instead, wash them in a container filled with water and reuse this water for watering plants.
Posted by Jahnavi Singh 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
The common ancestor of humans and chimpanzees evolved in different ways to produce the present forms.
Evolution produces more diverse and complex body forms over time, but the newly formed species are not more progressive than the already existing ones. So, it is wrong to say that evolution produces progressive higher forms from lower ones.
All human beings, whether fair skinned or dark skinned, belong to the same species i.e. <i>Homo sapiens </i>that originated in Africa.
The human ancestors gradually migrated from Africa to various parts of the world like Asia, Europe, Australia and America. Thus, they spread to different parts of the Earth and adapted as best as they could to their environmental conditions.
Posted by Neeraj Kumar 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
Prevention of soil pollution:
- To prevent soil pollution, its causes must be controlled.
- Plastics and polythene bags destroy the fertility of soil. Hence, they should be disposed properly and if possible, their use should be avoided.
- Some waste products from industries and homes pollute soil. These pollutants should be treated chemically to make them harmless before they are disposed.
- Other pollutants of soil include pesticides and insecticides. Therefore, excessive use of these substances should be avoided.
Prevention of soil erosion:
- By planting trees.
- Checking indiscriminate cutting of trees.
Posted by Harsh Singh 5 years, 10 months ago
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Mushrooms are fungi, and are usually placed in a Kingdom of their own apart from plants and animals. Mushrooms contain no chlorophyll and most are considered saprophytes. That is, they obtain their nutrition from metabolizing non living organic matter.
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Posted by Ayush Garhwal 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
1 km = 1000 m; 1 hr = 3600 sec.
1 km/hr = 1000/3600 m/sec = 5/18 m/sec
To convert km/hr into m/sec, multiply the number by 5 and then divide it by 18.
56 km/hr
Step 1:
Multiply 56 by 5
We have 56 * 5 = 280
Step 2:
Divide 280 by 18
280/18 = 15.5
Final Answer:
56 km/hr = 15.5 m/sec
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Meghna Thapar 5 years, 9 months ago
Multiply the Celsius temperature by 1.8 and add 32 to get the Fahrenheit conversion With this method you get the exact temperature conversion degree.
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