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Metals react with ACIDS to form metal salts
EG : 2NA + 2HCl ------ 2NaCl + H
2
Non metals don't react with acids



Metal s react with oxygen to form metal OXIDES that are basic in nature


Non metals form non metallic oxides that are ACIDIC in nature

When vehicles LIKE car , truck do noise then we CALL it noise POLLUTION.

The term 'base metals' commonly refers to the industrial, non-ferrous metals: COPPER. LEAD. Nickel.

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No, I don't think if we eat food HANGING upside down it will PASS through alimentary canal as we won't be able to swallow it and if we won't be able to swallow it , it won't even pass through oesophagus so there fore we can't eat food hanging upside down.


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Centrifugal FORCE, towards the nucleus, in general, the gravitational ATTRACTION between the Sun and even the orbits of most of the planets around the Sun are almost CIRCULAR, even the Pluto's orbit and aturn Neptune in a similar way, ELECTROSTATIC forces can keep charged.

The planets revolve around the sun due to the gravitational force.

Number of NEUTRONS- 40-20 =20, electrons-20 and PROTON -20.

The mass number of an isotope is the sum of the number of protons as well as neutrons in the ATOMIC nucleus.

Overall, the atomic number is the number of protons.

EVEN the calcium-40 isotope has a mass number of 40 as well as an atomic number of 20, therefore it has 20 protons

The lanthanides and actinides are groups of elements in theperiodic table. They are the elements that are often listedbelow the main section of the periodic table. There are thirtytotal elements in the lanthanides and actinides. They areoften called the "innertransition metals."Lanthanides:-The lanthanides are the elements with atomic numbers from57 to 71. These 15 metals (along with scandium andyttrium) are often called the rare earth elements. They areall silvery-white metals which are often found in the sameores. They are called the lanthanides because they exhibitsimilar chemical PROPERTIES to lanthanum, the first elementin the group.Actinides:-Actinides are the 15 elements with ATOMICNUMBERS from 89to 103. They are named after the first element in the series,actinium. The actinides group includes mostly man-madeelements with only a few exceptions such as uranium andthorium. The actinides are most known for the elementsuranium and plutonium which are USED in NUCLEAR reactorsand nuclear bombs.

The core material in a solenoid is of a ferromagnetic nature. ... The electromagnetic field in a solenoid results in the armature moving FORWARD or backward due to the solenoid coil. Solenoids are either USED to GENERATE a CONTROLLED magnetic field or act as a transducer DEVICE capable of producing linear motion

Hello dear your answer is in down

the ground has a lower specific heat and so its TEMPERATURE increases more than the temperature of the water .The ground hits the air above it Which rises in CONVENTION currents and cooler air from over the Ocean flows towards the SHORE to fill in the gaps LEFT by the rising warm air.


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For her GROWTH of the PLANT or CROP

The ADVANTAGE is that the PLANTS GROW in GOOD RATE.

If we compare Manure with fertiliser so , I think Manure is BEST . Because Manure is made from natural things LIKE :- cow dung , VEGETABLES and FRUITS PEELS , egg shells etc. And fertiliser is made from chemicals .

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You should be making a model of " How our solar system formed " it should be the best from my views
you should fist make a dust cloud / nebula
then in another part show that the middle portion starts rotating and COLLECTS MATTER and forms sun and from the left PLANETS have formed
in next step show a small sphear of gas which rotates and it outer surface cooled down to form SOLID coat and formed earth
then show a collisions of meteors on earth surface
then show the ice age
then the occurrence of first form of life
then the formation of life

Particle nature is BEHAVIOUR shown by VARIOUS objects and other things in nature.There are MAINLY two natures shown by ANYTHING. Wave and particle. In wave nature the thing’s PRESENCE cannot be judged perfectly. It can always be assumed in a particular area. But in particle nature, the thing act as a solid object having mass and motion with some specific pattern. Its position can be judged at any point of time. In particle nature the object has a shape and mass.

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Yes, because the BLOOD in ARTERIES flow with a higher pressure, to RESIST that pressure they have thicker walls.

The common pitcher PLANT, or side-saddle flower is found in BOGS from Labrador to Florida and Iowa. The Nepenthaceae, an Old World tropical FAMILY, ranging from China to Australia and Pacifica and found chiefly in Borneo, consists of the single GENUS Nepenthes.

Atomic NUMBER is the number of protons as WELL as the number of proton is equal to the number of electrons EVEN the carbon atom has 6 electrons.

Atomic number of carbon is 6.

For carbon and the atomic MASS number is 12 (6 protons plus 6 neutrons).

ADDING the two neutrons changes our atom.

ANSWER:

the atomic mass of oxygen is 16. it's atomic number is 8.

Explanation:

no.of protons = no.of electrons=atomic no.(Z)

the mass of an ATOM is concernetrated at its NUCLEUS so the TOTAL no.of protons and neutrons is it's atomic mass.

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Atomic number for sodium is 11.

The mass number is the sum of the neutrons and protons in an atom.

Even 11 protons + 12 neutrons= 23.

The Atomic number is simply the PROTON number as well as the atomic number is always SEEN at the bottom left CORNER in a ELEMENT of a periodic table.

The process in which all SMALL molecules called monomers are LINKED TOGETHER to FORM a chain is called POLYMERIZATION. Two polymers are polythene and polyester

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One of the simplest way is to PUT them water and see the seeds that float on water and eliminate them as these seeds have holes between them and are not healthy

OR

By the process of hand picking.
Hand picking is the process in which the components of the mixture are separated by hand. Here one of the components should be PRESENT in small quantity. And the other component should be differ in shape, size , colour.

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Thomson’s ATOMIC Model

In 1898, J. J. Thomson proposed the first of many atomic models to come. He proposed that an atom is shaped like a sphere with a radius of approximately 10-10m, where the positive charge is UNIFORMLY distributed. The electrons are embedded in this sphere so as to GIVE the most stable electrostatic arrangement.

Doesn’t the figure above remind you of a cut watermelon with seeds inside? Or, you can also think of it as a pudding with the electrons being the plum or the raisins in the pudding. Therefore, this model is also referred to as the watermelon model, the plum pudding model or the raisin pudding model.

An important aspect of this model is that it assumes that the mass of the atom is uniformly distributed over the atom. Thomson’s atomic model was successful in explaining the overall neutrality of the atom. However, its propositions were not consistent with the results of later experiments. In 1906, J. J. Thomson was awarded the NOBEL Prize in physics for his theories and experiments on ELECTRICITY conduction by gases.

<P>Protons, neutrons, and electrons are the three main subatomic PARTICLES FOUND in an atom. Protons have a positive (+) charge. An EASY way to remember this is to remember that both proton and positive START with the letter "P." Neutrons have no electrical charge.

Dalton' atomic theory TELLS about that electrons MOVE in shells or orbit.

As well as Thomson said that there are positive CHARGES in the centre and it is the nucleus.

Normally Dalton’s theory stated that atoms were INDIVISIBLE, in the energy Democritus' model of the atom was simply a round, solid ball.

All matter is made of atoms 2

RUTHERFORD overturned THOMSON's model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy NUCLEUS. Rutherford DESIGNED an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.

Decantation is a process to separate mixtures by removing a liquid LAYER that is FREE of a PRECIPITATE. The purpose may be to OBTAIN a decant (liquid free from particulates) or to recover the precipitate.

1-duck
2-fishe
3- crocodile
4- frog
5-whale

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A circular loop is made up of large number of very small straight wires.A magnetic fieldis PRODUCED by an electriccurrent flowing through acircular coil of WIRE.Each small SECTION of CURRENT carrying wire contributes to magnetic fieldlines.

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Sewing is the most important PART of crop production before sowing good quality seeds are selected good quality seeds are CLEAN and healthy seeds of a good variety. farmer PREFER to use seeds which give a HIGH yield.

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MAIN COMPONENT OF

ELECTRIC BELL

Important parts of an electric bell are :

1. Electromagnet

2. Armature

3. Spring

4. Armature rod

5. Hammer

6. GONG

CONSTRUCTION

One end of armature winding is connected to TERMINAL T1 and the other to a spring, which is mounted on a soft iron strip. A rod is attached to the armature and the free end of the rod carries a small hammer, which strikes a bell. A very light spring is attached to a screw, which is joined to terminal T2.

WORKING OF ELECTRIC BELL

The electric circuit is completed through a battery and push switch button connected to the terminal T1 and T2. When the push button is pressed the electric circuit is completed and the armature is attracted towards the electromagnet as a result, the small spring gets detached from the screw due to which the electric circuit is broken and the electromagnet is demagnetized. HENCE, the attraction disappears and the armature is BROUGHT back by the spring to its original position. Contact of the spring with the screw is now remade, which completes the electric circuit. The action is repeated over and over again consequently. The armature vibrates and hammer attached to it strikes the gong and the bell rings and sound is produced.

Each N every act done by ANYBODY is its action
and
reflection is the bouncing BACK of light after STRIKING a SURFACE

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Power conditioning. Reservoircapacitors are USED in power SUPPLIES where they smooth the OUTPUT of a FULL or HALF wave rectifier.

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The answer should be MAGNETIC field.

Magnetic field, region in the neighbourhood of a magnet, ELECTRIC current, or CHANGING electric field, and the magnetic FORCES are observable.

As well as magnetic fields such as that of the Earth CAUSE magnetic compass needles even other permanent magnets to line up in the direction of the field.

E. m. f of the CELL (potetential), note that if q is negative, and its sigh should be USED in the equation.

Even the system consisting of a negative and a POSITIVE point-like charge has a negative potential energy.

A negative potential energy means that WORK MUST be done against the electric field in moving the charges apart.

A CELL is SINGLE unit that CONVERTS chemical energy to electrical energy. A battery is nothing MUCH its just a collection of cell. We all have SEEN car battery not a cell, because a single cell doesn't has enough potential to run the car so the battery is used in the cars

The GASES are OXYGEN and HYDROGEN....
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Black marble absorbs the SUN's light while yellow SANDSTONE REFLECT

A) the PROCESS of SETTLING or being DEPOSITED as a sediment.

b) spelling problem


c)Filtration is any of various mechanical, physical or biological operations that separate solids from fluids by adding a medium through which only the fluid can pass. The fluid that passes through is called the filtrate.

The density of the substance is more than the density of water (1 G cm-3). Hence, it will sink in water.

As the PACKET is fully submerged in water,

MASS of water displaced by the packet = volume of the packet x density of water

                                                    = 350 CM3 × 1 g/cm3 = 350 g

The DENSITY of a METAL is 10.8 X 10³ kg/m³. FIND the RELATIVE density of the metal.

DENSITY of iron (DR) = 7.8×10³ kg/m³

volume of iron piece(V) = 100cm³ = 10^(-4) m³

density of WATER (Dw) = 10³ kg/m³

(a) weight in air = Dr×V×g = 7.8×10³ × 10^(-4) ×10 = 7.8 N

(b) upthrust is the buoyant FORCE exerted by water

   upthrust = Dw×V×g = 10³ × 10^(-4) ×10 = 1N

(c) APPARENT weight in water = weight in air - upthrust

                                        = 7.8N - 1N = 6.8N

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