Explain the types of physical division and chemical division of matter.( Also explain the sub-types of chemical division.)

Matter is anything that possesses mass, occupies space and may be perceived through one or more senses.

                           The physical divisions of matter are:

1. Solid : Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around.

2. Liquid : Liquid matter is made of more loosely packed particles. It will take the shape of its container. Particles can...

Define chemical equation. Why is the burning of wood called chemical change? Mention some significance of chemical equation. What does the formula H2SO4 signify? Explain.

Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae.

                                   The burning of wood leads to the formation of new substances like ash (carbon), carbon dioxide gas, water vapour, heat and light. This change is irreversible and         hence,...

How does Dalton's atomic theory explain the law of conservation of mass?

According to the Dalton's atomic theory, law of conservation of mass states that, "Matter is made up if extremely small indivisible particles which can neither be created nor be  destroyed."

Distinguish between central govt. and state govt.

Other than phase change, are there conditions in which the temperature of a body remains constant regardless of the amount of heat supplied to it?

Yes, there are certain conditions under which the temperature of a body can remain constant regardless of the amount of heat supplied to it. These conditions occur when the body is in thermodynamic equilibrium with its surroundings.

In thermodynamic equilibrium, the body is in a state where it is no longer exchanging heat or matter with its surroundings. This means that the body is at a constant temperature and is not undergoing any changes in its internal energy.

If a body is in thermodynamic...

Batteries are always labeled with their emf, would it also be appropriate to put a label on batteries stating how much current they provide? Why or why not?

Ans: No, a battery does not always produce the same current, no matter what circuit it’s used in. The current in any electric circuit consisting of a cell of emf E and internal resistance r and an external resistance R is given by 

 I = E/(R + r)

This equation shows that the current that a source of emf produces in a given circuit depends on the external resistance R as well as the internal resistance r of the cell. The greater the resistance, the less current the ...

State the hypothesis about the origin of earth?

According to the tidal hypothesis, big star orbiting around the sun finally approached It. A large mass of gas ejected from the sun due to the tidal effect. In the course cooling, the tidal matter fragmented into small pieces forming planets, satellites, etc. As a result, the solar system was formed.