Question

1. What are Displacement Reactions?
2. Explain Double Circulation?
3. Describe any 2 methods of asexual reproduction in plants?
4. What is Joule Heating effect?
5. Why magnetic field lines never intersect each other?
carry 1 mark each
plzz somebody help me fast​

Answer 1

Explanation:

A single-displacement reaction, is a chemical reaction in which one element is replaced by another in a compound. It can be represented generically as: A + B-C → A-C + B This will most often occur if A is more reactive than B, thus giving a more stable product

2.The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice: the pulmonary circuit is between the heart and lungs. the systemic circuit is between the heart and the other organs.

3.Different methods of asexual reproduction: (i) Vegetative propagation: In this asexual reproduction, new plants are produced from roots, stems, leaves and buds of individual plant. ... (ii) Budding: The bud is a small projection which gradually grows and gets detached from the parent cell and forms a new yeast cell

4.Joule heating (also referred to as resistive or ohmic heating) describes the process where the energy of an electric current is converted into heat as it flows through a resistance. ... The heat is generated on the microscale when the conduction electrons transfer energy to the conductor's atoms by way of collisions

5.Reason – The two magnetic field lines do not intersect each other because if they do it means at the point of intersecting the compass needle is showing two different directions which are not possible

Answer 2

Answer:

1. Displacement Reaction involve a metal and a compound of a different metal. In a displacement reaction, a more reactive metal will displace a less reactive metal from its compounds.
2. The oxygenated blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice through the heart making one complete round through the body, is called Double Circulation.
3. They include binary fission, fragmentation, and budding. Binary fission occurs when a parent cell splits into two identical daughter cells of the same size.
4. Joule Heating describes the process where the energy of an electric current is converted into heat as it flows through a resistance.
5. The magnetic field lines do not intersect each other because if they do it means at the point of intersecting the compass needle is showing two different directions which are not possible.

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