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In general, you can determine the glass-transition temperature (Tg) of fiber-reinforced polymer (FRP) composites using the DIFFERENTIAL Scanning CALORIMETRY (DSC)
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Homogeneous mixture

Heterogeneous mixture



1. A mixture in which different constituents are mixed uniformly.

1. A mixture in which different constituents are not mixed uniformly.

2. They cannot have physically distinct parts.

2. They have physically distinct parts.

3. The constituents cannot be easily seen.

3. The constituents can be easily seen.

4. The constituents cannot be easily separated.

4. The constituents can be easily separated.

5. Example : SUGAR solution, soda, water, soft drinks, VINEGAR, air ETC.

5. Example : Sugar and SAND mixture, milk, ink, PAINT, wood, blood etc.

1 . ELEMENTS are metal because they found in freely in nature and metal carry a POSITIVE charge .

2. Because its atomic number is LARGE .

The LONE pair ELECTRON are LOCATED on NITROGEN and the lone pair electron on amides are delocalized b/w the nitrogen and oxygen through resonance.
Because of this amine are more basic than amides

S. is CHEMICAL FORMULA of SULPHUR

First law ( law of orbit) -
All the planet revolving around in a elliptical orbit ND sun having one focus of orbit.


Second law ( law of areal SPEED) -
The line joining any planet to the sun ssweeps out EQUAL area in equal time interval that is the areal speed of planet REMAIN constant.


Third law ( law of period) -
The square of revolution is directly proportional to the CUBE of semi major axis of its elliptical orbit.


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It is IRON II OXIDE....

Acid rocks have over 65% silica, intermediate rocks have 55-65% silica, and basic rocks have 45-55% silica.Igneous rock forms when magma(MOLTEN rock) COOLS and solidifies. Extrusive igneous rocks are those FORMED when magma reaches the SURFACE (at which point it is called lava), cooling and solidifying quickly.

The only advantage is that it is a very simple VISUAL model of an atom proposed by J. J. Thompson in the early 1900's.   His model of the atom consisted of a large cloud of positive matter with imbedded NEGATIVE particles making the overall mass neutral.   The MAIN disadvantage is that it is wrong.   Thompson's student Ernest Rutherford showed that the positive matter inside the atom was not spread out but was concentrated at the very center of the atom. 

In the Thomson model of the atom (1904), the negatively charged electrons move within a "soup" or "cloud" of positive charge.  One significant theoretical problem is that the positive cloud is not stable unless other, nonelectric, forces hold it together.

The main problem with Thomson's model is experimental: The Geiger-Marsden experiment (1909) showed that the positive charge is not spread out, but is concentrated in a very small "nucleus".  Of course, this nucleus also requires nonelectromagnetic forces to hold it together, but that wasn't an ISSUE until 1932, when the neutron was discovered.

In the Thomson model of the atom (1904), the negatively charged electrons move within a "soup" or "cloud" of positive charge.  One significant theoretical problem is that the positive cloud is not stable unless other, nonelectric, forces hold it together.

The main problem with Thomson's model is experimental: The Geiger-Marsden experiment (1909) showed that the positive charge is not spread out, but is concentrated in a very small "nucleus".  Of course, this nucleus also requires nonelectromagnetic forces to hold it together, but that wasn't an issue until 1932, when the neutron was discovered.

The process in which ORBITAL of atoms of different SHAPE size geometry and energy mix with each other and form orbitals of same shape energy size nd geometry


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It is DUE to the SHIELDING EFFECT

Double DISPLACEMENT : The reaction in which the constituent atoms of the reaction INTERCHANGE by the decomposition of the TWO reactants, to produce NEW compounds are CALLED double displacement reactions.

Example- HCl + NaOH = NaCl + H2O

Density is a physical property of MATTER, as each element and compound has a unique densityassociated with it. Density defined in a qualitative manner as the measure of the relative "HEAVINESS" of objects with a constant volume. For gases THEDENSITY MAY vary with the number ofgas MOLECULES in a constant volume.

STANDARD TEMPERATURE PRESSURE
AND ITS VALUE IS 22.4 L
As your answer came then you MULTIPLE of 22.4 into them

Carbon dioxide is liberated WHAN an ACID is ADDED to CARBONATES and bicarbonates.

WATER MOLECULE can form 4 HYDROGEN bonds.

This void is SURROUNDED by SIX spheres and formed by the combination of two TRIANGULAR void of the FIRST and SECOND layer .

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Hey FRIEND !
Vapoursation= The PROCESS of change of water into vapour is called vaporisation.

Evaporation= the process of change of liquid into vapour without touching it BOILING point is called evaporation.

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Yes, SIMPLY speakingit is just an equivalence relationship between energy and mass, however, it has a truly deep implications.For example, knowingthat, the total change in mass, dose not fit to total ISSUED energyin beta DECAY, gave Pauly a hint to theorize a new PARTICLE called neutrino.It alowed Dirac to construct his equation and predict existence of antimatter.It allowed us to discover the existence of dark matter, also by by noticing that galaxiesmass, and energy dose not fit in this equation!And many more...Of course all those discovers was not made only by this equation, but it played a vital roule, but it hard to explain how exactly it done inlayman words.And finally, I will mention that currentlythis equation is built in very deeply in modern PHYSICS.

Liquefaction of a gas occurs when its MOLECULES are pushed closer TOGETHER. Gas molecules can be squeezed together by one of TWO methods: by increasing the PRESSURE on the gas or by lowering the TEMPERATURE of the gas

There are plenty of experiments that DEMONSTRATES the cohesive and bond ENERGY. CHECK them out they will definitely help!

For which CLASS QUESTION you NEED?

Afforestation HELPS to PREVENT global WARMING
afforestation and reforestation also helps to moderate the CLIMATE it also helps to rebuild habitat .........

Sodium CHLORIDE. Table salt, or sodium chloride, is the ionic product of the combination of lye, or sodium hydroxide, and hydrochloric acid. ...

AMMONIUM Dichlorate. ...

MAGNESIUM Sulfate. ...

Sodium Bicarbonate.

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Elements -
1. They are pure substance which CONSISTS one type of atom.
2. They can not be broken into simple substance even by chemical MEANS.
3. There are 118 elements.

Compound -
1. They are made up of two or more elements combined in FIXED PROPORTION by weight.
2. There constituent can be separated by chemical means.
3. The no of compound is much more.

Here is your ANSWER in this PICTURE

The AZIMUTHAL quantum NUMBER is a quantun number for an atomic orbital that determines its orbital angular momentum and describes the shape of the orbital. The azimuthal quantum number is the SECOND of a set of quantum numbers which describe the unique quantum number of an electron (the OTHERS being the principal quantum number, following  spectroscopic notation, the   magnetic quantum number, and the spin Quantum number). It is also KNOWN as the orbital angular momentum quantum number, orbital quantum number or second quantum number, and is symbolized as ℓ.
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Hey mate...
Here is your answer :

2.5 molal AQUEOUS solution implies 2.5 moles in 1 kg, i.e. 55.56 moles of water. 2.5m aqueous solution contains2.5 moles of SOLUTE in 1000g of water. ACTUALLY it is 2.5(M) aqueous solutionthat MEANS 1 litre solution contains2.5 g of solute.

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Natural THINGS are those which we OBTAIN naturally from our SURROUNDINGS such as FRUITS and vegetables, ayurvedic medicines etc...

1. When an ANT bites us and we rub a key over the wound
2. When we touch nettle PLANT we FEEL a stinging PAIN and you apply baking powder over the wound

No all VEGETABLES are not ACID

Here is the ANSWER for QUESTIONS no. 10 ASKED by you

steam will cause more sever BURNS because during vaporization the ENERGY used to convert it or we can say DUE to LATENT heat of vaporization.

Physisorption means when only wanderwaal force b/w adsorbent and adsorbate WHEREAS CHEMISORPTION means when CHEMICAL BOND develop b/w adsorbent and adsorbate

Physical properties of matter can be OBSERVED and TESTED. They include properties such as color, length, volume, odor, and DENSITY. These properties are extensive if they depend on the amount of the substance being USED or intensive if they do not depend on the amount of substance being used.

I didn't UNDERSTAND this QUESTION....

It is too DIFFICULT chapter I left that because it becomes easier after studying acid and base chapter and CARBON compound
then it become EASILY understable
I am also in class 10 CBSE

HI FRIEND....

PLATINUM, GOLD and SILVER are used to make jewellery because these are low reactive metals so rarely corrosion occur (In silver) and hence do not LOST their shine and lustre......

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An EQUATION in which REACTANTS REACT with each other to form a new PRODUCT