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Posted by Anushka Bora 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Nerves from all over the body meet in a bundle in the spinal cord on their way to the brain. Reflex arcs are formed in the spinal cord. This characteristic allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain. Reflex arcs are needed for quick responses.
Muskan Singh ✍✍ 5 years, 8 months ago
Lucifer?? Morningstar?? 5 years, 8 months ago
Posted by Karnika Kumari 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Electric potential is the work done per unit charge in bringing the charge from infinity to that point against electrostatic force.
In a conductor, electrons flow only when there is a difference in electric pressure at its ends. This is also called potential difference. In a circuit, this potential difference is created by a battery.
Posted by Gandhar Sathe 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
| Autotrophs | Heterotrophs |
| Autotrophs are organisms that prepare their own food. | Heterotrophs depend upon other organisms for nutrition. |
| These are known as the producers and include green plants, algae and a few photosynthetic bacteria. | These are the consumers and include cows, buffaloes, tigers, horses, etc. |
| These can be classified as photoautotrophs and chemoautotrophs. | These can be classified as photoheterotrophs and chemoheterotrophs. |
| The chloroplast helps in preparing food. | They do not contain chloroplast so cannot prepare food. |
| They obtain energy from inorganic sources by converting light energy into chemical energy. | They obtain energy directly or indirectly from other organisms. |
| Autotrophs can store light energy and chemical energy. | Heterotrophs cannot store energy. |
| They are placed at the primary level in the food chain. | These are placed in secondary or tertiary level in the food chain. |
| These can move from one place to another in search of food and shelter. | They cannot move from their place. |
Dhruvi Prajapati 5 years, 8 months ago
Posted by Chaman Rao 5 years, 8 months ago
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Pratyaksh Chaudhary 5 years, 8 months ago
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Simmi Jain 5 years, 8 months ago
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Shreya_ S❤️ 5 years, 8 months ago
Posted by Mrinalini Singh 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Chemical reactions can be classified in following types:
- Combination Reaction
Example: When magnesium is burnt in air (oxygen), magnesium oxide is formed. In this reaction, magnesium is combined with oxygen.
<i>Mg + O2 </i> →<i>2MgO</i>
<i>Magnesium + Oxygen ⇨ Magnesium oxide</i>
-
Decomposition Reaction
Example: When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide
<i>CaCO3 </i> →<i> CaO + CO2</i>
- Displacement Reaction
Example: When zinc reacts with hydrochloric acid, it gives hydrogen gas and zinc chloride.
<i>Zn + 2HCl </i> →<i>ZnCl2 + H2</i>
- Double Displacement Reaction
Example: When solution of barium chloride reacts with the solution of sodium sulphate, white precipitate of barium sulphate is formed along with sodium chloride.
<i>BaCl2 + Na2SO4 </i> → <i>BaSO4 + 2NaCl</i>
- Oxidation and Reduction Reaction
Example: When iron reacts with air, it forms iron oxide (rust)
<i>4Fe + 3O2 </i> →<i> 2Fe2O3</i>
Dhruvi Prajapati 5 years, 8 months ago
Posted by Ayushi Maheshwari 5 years, 8 months ago
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Posted by Manshi Jakhar 5 years, 8 months ago
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Simmi Jain 5 years, 8 months ago
Simmi Jain 5 years, 8 months ago
Shreya_ S❤️ 5 years, 8 months ago
Posted by Sanket Sundar 5 years, 8 months ago
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Simmi Jain 5 years, 8 months ago
Posted by Chaman Rao 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
10 parts exactly
we know in parallel
1/R = 1/ R₁ +1/R₂ + ................
so, for 10 parts of resistance 10 Ω each...
1/R = 1/10 + 1/10 +............10 times...
= 10 x 1/10
= 1 Ω
Posted by Neetu Sharma 5 years, 8 months ago
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Lucifer?? Morningstar?? 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
A magnet magnet put in a solenoid behave like a bar magnet is the electric current flowing in the circuit is called Electromagnet
It increase the strength by following condition
1.) Increase the number of stunning
2.) more current should be passed
Posted by Lucifer?? Morningstar?? 5 years, 8 months ago
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Posted by Santosh Chaudhary 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Resistance is a property of conductor due to which it resists the flow of electric current through it. Component that is used to resist the flow of electric current in a circuit is called resistor.
In practical applications, resistors are used to increase or decrease the electric current.
Variable Resistance: The component of an electric circuit which is used to regulate the current; without changing the voltage from the source; is called variable resistance.
Rheostat: This is a device which is used in a circuit to provide variable resistance.
Lucifer?? Morningstar?? 5 years, 8 months ago
Posted by Sanket Sundar 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. helps to break the complex food particles into simple ones so that these simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.
Muskan Singh ✍✍ 5 years, 8 months ago
Posted by Rituraj Chauhan 5 years, 8 months ago
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