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The chemical BOND formed between two atoms by mutual sharing of a pair of valence shell electrons so that both of them can attain OCTET or DUPLET in their valence shell is called the covalent bond .


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QUESTION :

Why is the earthworm referred to as farmer friend?

Answer :

The earthworm is referred to as the friend of farmer because of the FOLLOWING reason :

The waste material of earthworm is rich in the nitrogenous content which increases the FERTILITY of the soil.

Thus the earthworm helps the farmer indirectly by increasing the fertility of the soil.

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The Ahom state or society was divided into clans CALLED khels.A khel controlled several villages.All adult males SERVED in the army during war.People from heavily populated areas were shifted to LESS populated places.Peasants were assaigned land by the village COMMUNITY.

ANSWER:

it repirate through the LEAF

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⭐⭐⭐ (D) → Vegetable oil ⭐⭐⭐


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Hey mate here's the ANSWER ...

1. True.

2. false

3. false

4. false
.


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Here is your answer

option B is the RIGHT answer

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Electrostatic generators. The presence of SURFACE charge IMBALANCE means that the objects will exhibit attractive or repulsive forces. ... Conductive objects only rarely GENERATE charge imbalance except, for example, when a metal surface is IMPACTED by solid or liquid nonconductors.

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Fusion of male and female gamete to make ZYGOTE is known as fertilization
External fertilization : in this DIFFUSION takes place OUTSIDE the female BODY
internal fertilization : In diffusion takes place inside the female body. it is more secure way

Milligram measure the mass of an OBJECT like MEDICINE and salt.
petrol and kerosene are measure in kiloliter.
KM measure the DISTANCE between TWO places or cities. km are used to measure the distance.
grams measure for non liquid ingredients like cooking and grocery shopping.

D SOLAR COOKER MIRROR

When we beat the drum with SMALL BLADES on it we observe that those blades are jumping, and the harder we strike the drum the higher the blades will RISE and fall. this is also an experiment to prove that the amplitude of a SOUND can be measured in that way.

Whittaker proposed an elaborate five KINGDOM CLASSIFICATION – Monera, PROTISTA, Fungi, Plantae and Animalia. The main criteria of the five kingdom classification were cell STRUCTURE, body organisation, mode of nutrition andreproduction, and phylogeneticrelationships.

"PROCEDURE

1. Set up the circuit ARRANGEMENT as shown in circuit diagram or apparatus arrangement.

2. Note the least count of the ammeter and voltmeter.

3. Find, if any, zero error of the ammeter and voltmeter and record it in table ‘A’.

4. Plug the key/switch on the battery ELIMINATOR and adjust the rheostat by sliding its variable terminal TILL the ammeter and the voltmeter show a reading.

5. Note the readings of ammeter and voltmeter in table ‘B\ Take out the plug or switch off the battery eliminator for a moment.

6. Repeat the step 4 and 5 for the different values of current by varying the sliding terminal of rheostat.

7. Tabulate all the observations in the OBSERVATION table ‘B’ and find the ratio of V /I for each set of observations. Find the MEAN value of R.

8. Plot a graph by taking / along y-axis and V along v-axis or V along .r-axis and I along y-axis.

"

Hey my friend UR answer is (d) carboxylic acid
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The phenomenon in which Two or more compounds having same MOLECULAR formula may EXIST with DIFFERENT structural formulae is called isomerism. The different STRUCTURES are given in the picture above.

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The periodic table also has a special NAME for its vertical columns. Each COLUMN is called a GROUP. The elements in each group have the same number of ELECTRONS in the outer ORBITAL. Those outer electrons are also called valence electrons.

Answer:

DC Generator:

1. DC generator generates Direct Current.

2. It has COMMUTATOR, split rings and BRUSHES

3. It has less output voltage and frequency.

4. It needs high maintenance

5. It is less efficient in transmitting energy for long distance

AC Generator:

1. AC generator generates ALTERNATE Current.

2. It has no Commutator but has brushes and slip rings.

3. It has higher output voltage and frequency compared to DC generator.

4. It needs less maintenance

5. It is highly efficient in transmitting energy for long distance.

These are the major differences.

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⊙ HIGHER altitude means LOW atmospheric pressure and thus low boiling point.


⊙ so,FOOD needs to be cooked for a longer TIME there DUE to low boiling point.

When the incident RAY ENTERS the GLASS slab it bents TOWARDS the normal as glass slab is denser than air. And when the Rays enters air bents away from the normal and PARALLEL to the incident ray.

By rubbing: When a body is rubbed with another body, both of themcharged. One of the bodies ACQUIRES POSITIVE charge and the other acquires negative charge. For example, when a glass ROD is rubbed with a silk, the glass rod acquires positivecharges,and at the same time, the silk,the silk acquires negative CHARGES. if you liked my answer can you mark as brainlist

Distance : 2200 m and displacement is 200 m

detail explanation:

one round circular track of 200 m dia in 40 SEC

distance travelled in 2 min 20 sec = distance travelled in 120+20 = 140 sec

one COMPLETE round takes 40 sec then how many ROUNDS he can do in 140 sec = 3.5 rounds nothing but 7/2

circumference of circle = distance travelled to complete one circular track = 2 x pie x radius means pie x diameter

7/2 rounds distance = 7/2 * pie * dia = 7/2 * 22/7 * 200 = 2200 m distance

displacement means shortest distance, THOUGH he travelled 3.5 rounds but displacement is diameter only

so displacement is 200 m

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The distribution of water on the Earth’s surface is extremely uneven. Only 3% of water on the surface is fresh; the remaining 97% resides in the ocean. Of freshwater, 69% resides in glaciers, 30% underground, and less than 1% is located in lakes, rivers, and swamps. LOOKED at another way, only one percent of the water on the Earth’s surface is usable by humans, and 99% of the usable quantity is situated underground.

All one needs to do is study rainfall maps to appreciate how uneven the distribution of water really is. The white areas on the map below had annual rainfall under 400 mm for the last YEAR, which makes them semi-arid or arid. And, remember, PROJECTIONS are for significant aridification to occur in many dry REGIONS and for more severe rainfall events to characterize wet regions.

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Answer:

If we understand something and if our CONCEPTS are CLEAR we can REMEMBER any thing . As we only try to memorize without clearing the concept we fail to remember the subject matter RELATED to SCIENCE

The MAIN source of LIGHTAND HEAT for all LIFE on EARTH is the sun.

Air pollution CAUSES acid RAIN MATE

so PEOPLE replace THINGS: smartphones, tablets, phablets, laptops, LEDs, LCDs, DVD players, portable music players. Whether from breakdown, slow-down, or just the availability of a newer model, people discard electronics at the slightest inconvenience. It’s not just laziness or a lust for the future, either; the ECONOMICS of gadgets encourages disposal. In some cases, for example, BUYING a new printer is cheaper than buying a set of new ink cartridges.

The increase in consumption of electronics has two major adverse ECOLOGICAL effects

The hormone thyroxine is released by THYROID gland...
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LET I1,I2,I3 be the current flowing through R1,R2,R3 respectively

therefore, I=I1+I2+I3_____________(i)

let the effective resistance of this parallel combination be Rp, then using, OHM's law

I=V/Rp_______________________(II)

As V is same for all resistor, therefore

I1=V/R1 ,I2=V/R2 ,I3=V/R3_________(iii)

hence, from eqn (i), (ii),(ii), we get

V/Rp=V/P1+V/R2+V/R3+V[ 1/R1+1/R2+1/R3]

|____________________ |

|     1/R1 + 1/R2+ 1/R3            |                          

|____________________|

PHENOLPHTHALEIN is a weak ACID, which is why when it is added in a STRONG base, it gives pink color and the color GETS intense as the PH of the base INCREASES.

If a strong acid such as HCL is added in this solution, it with react with base and cause neutralization. By adding HCL in the solution, the pink color of  phenolphthalein will disappear. This is also called Acid- Base Titration.

Atomic model models using material such as old CD balloon THREAD marble ETC are basically tightly bound ATOMS to each other.

It is DUE to inertia that they tend to MOVE only when applied force and since they have high melting and boiling points that also helps in the same.

Newton's first law is we will be FORCE any OBJECT, then they ALSO opposite force of an object.

A mnemonic concerning the behavior of a CURRENT-carrying conductor in a magenetic field, according to which the direction of magenetic field, the current force exerted on the conductor are indicated RESPECTIVELY by the first FINGER, second finger and thumb of the left HAND when these are held out perpendicular to each other.
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HEY Buddy......!! here is UR answer

A permanent magnet us an object made from a material that is magnetised and creates its own persistent magnetic field. An electromagnetic is made of from a coil of wire which acts as a magnet when an ELECTRIC current passes through it.

Examples of electrical instrument made by USING permanent magnet : Electric Bell and Electric Motor.

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Here's your answer
a) JUPITER.
B) mercury.
C) Mars
d) mars
e) saturn
f) jupiter
g) venus
h) jupiter

The ANSWER is....

(B) जॉर्ज पैलेड

The FULL form of amu is ATOMIC MASS Unit.


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