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It's 78.37°C

Actually 5 types matter will seen in some book Solid Liquid Gas Plasma BEC

Matter has mass and occupy space .it has 3 type solid liquid and gas.

Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

Density can be defined as mass per Unit volume its Unit is kg/m^3

Density =mass/volume

Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

Define turning effect of force. Explain it by giving an example

1-5 x 105 J.

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A brownish substance that forms a layer on the surface of iron when iron exposes to moisture and oxygen is called rust

Rusting is a part of corrosion and is a chemical process which results in the formation of red or orange coating on the surface of metals.

Rust or rusting can affect only iron and its alloys.

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Electro magnetic form of lighr

Light: (i) Light is a form of energy, which includes the sensation of vision in our eyes and make us able to see various things present in our surrounding. (ii) When light falls on an object, some part of light is reflected back to our eyes.

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Rubbing produces charges of equal magnitude but of opposite nature on the two bodies because charges are created in pairs. This phenomenon of charging is called charging by friction. The net charge on the system of two rubbed bodies is zero. This is because equal amount of opposite charges annihilate each other. When a glass rod is rubbed with a silk cloth, opposite natured charges appear on both the bodies. This phenomenon is in consistence with the law of conservation of energy. A similar phenomenon is observed with many other pairs of bodies.