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herford MODEL, also known as planetary model is a model which tried to describe an atom devised by Ernest Rutherford. Rutherford directed the famous Geiger–Marsden experiment in 1909 which suggested, upon Rutherford's 1911 analysis, that J. J. Thomson's plum pudding model of the atom was incorrect. Rutherford's NEW model[1] for the atom, based on the experimental results, contained new features of a relatively high central charge concentrated into a very small volume in comparison to the REST of the atom and with this central volume also containing the bulk of the atomic mass of the atom. This region would be known as the "nucleus" of the atom.

ght falls on the surface of metal, it causes the emission of ELECTRONS from the metal surface.When the intensity of light is increased, it causes a large NUMBER of electrons to be ejected from the surface of metal. since photoelectric current is directly proportional to the number of photoelectrons emitted per second.But the energy of electrons remain the same because BRIGHTER light causes an increase in current but does not cause the INDIVIDUAL electrons to gain higher energies.the maximum K.E of electrons is independent of the intensity of the light. If the intensity of light is low, less number of electrons will be ejected but the k.e has not any effect.

circular motion...when a body MOVES in circular path with constant speed is known as uniform circular motion there are two types of accelerations in circular motion1.centripetal acceleration 2.TANGENTIAL acceleration Centripetal acceleration is responsible for change in direction of velocity while tangential acceleration is responsible for change in magnitude of velocity so in case of uniform circular motion there isn't change in magnitude of velocity but the direction of velocity changes at each point as the body is MOVING in circular path Non-uniform circular motion...When a body moves in circular path but its direction as well as magnitude of velocity changes at each point in case of non uniform circular motion both types of accelerations will produce the centripetal acceleration is always directed TOWARDS the center of the circle HOPE it will help

plete the QUESTION

Q=nene=Itn=It/e..........1where N REPRESENTS the number of ELECTIONS Now we have to find out the value of current IAs we KNOW that V=IR I=V/R I=2/1 I=2ATime is 2 mint=2×60t=120sputting the VALUES in eq 1n=2(120)/1.6×10^-19

not FIND thermal conductivity until the two objects are at two different TEMPERATURES because at different temperatures one body is at HIGHER temperature and the other is at lower temperature...the heat starts FLOWING from hotter OBJECT to the colder object in this way we can find the thermal conductivity of an object

e resistors are CONNECTED in PARALLEL their equivalent resistance is SMALLER than the individual resistance of a resistor 1/r=1/r+1/r+1/r..........+1/rnWhen the resistors are connected in series their equivalent resistance is greater than the individual resistance of a resistor r=r+r+r......+rn

y of ELECTROLYTIC cell :⇒ The device which contains both the electrodes ad the ELECTROLYTE cell is called the electrolytic cell .⇒ The two electrodes are anode and cathode .⇒ Electrolyte is the chemical compound which CONDUCT electricity in the fused state or aqueous solution state .⇒ Electrolytes are made up of ions and molecules.⇒ Strong electrolytes are made up of ions only.⇒ Weak electrolytes are made of both and non-electrolytes are made up of only molecules.⇒ Electrodes allow electric current to enter and LEAVE the electrolyte.⇒ Electrolytes have to be in solution state or fused state.⇒ Metals are liberated at cathode and non-metals at anode.⇒ An electrolyte on dissolving in water dissociates into free ions.⇒ These free ions HELPS to conduct electricity.Hope it helps !________________________

RE THE OSCILLATIONS WHICH TAKE PLACE UNDER NO EXTERNAL FORCE ARE FREE OSSCILATIONS.FORCED VIBRATIONS ARE VICE VERSA OF IT HOPE IT HELPS^_^

1971Explanation:The SI system of UNITS was developed and recommended by GENERAL CONFERENCE on WEIGHTS and MEASURES in 1971.Hope this helps:)

osion, FLOODS, DROUGHT, DESERTIFICATION

tretched STRINGS are called as vocal chordsand the VOICE box is also KNOWN as larynxhope it helps youMark it brainliest

n idea of DEMAGNETIZATION is to CAUSE the magnetic domain to point in random directions.Methods:HeatingHammeringElectrical Method using a.c HeatingWhen heated with Bunsen burner, the ATOMS of the magnet will VIBRATE vigorously and cause the magnetic domains to lose their alignment. Letting the magnet cool in the East−West direction will ensure that the domains will not realign. hope it HELPS mark me as brainliest

LOSELY RELATED TO MOMENTUM2 kinetic ENERGYI HOPE THIS INFO HELPS U

less of light cannot be a speed,. Basically you it has no MEANING., without the meter per SECOND. It is basically all RIGHT to simply write 3 instead of 3.00.hope it will help you plz mark as BRIANLIEST.

your ANSWER is C

a for example play an important role in DIGESTION helping to SYNTHESISE VITAMIN K and observe certain nutrients they also help CONVERT bill and acid in the intestine

Answer-τ = m×B● Torque-- Torque is a measure of how much a FORCE acting on an object CAUSES that object to ROTATE.- It's given by formula -τ = r×F● Torque in magnetic field -- Torque experienced by current CARRYING loop in magnetic field is given by- τ = m×BWhere all three are vector quantities.Hope it helps...

ind your answer is hereOhm's Law:-OHM’s Law STATES that the potential difference between two points is directly proportional to the electric current.This means; potential difference V varies as electric current.Or, V∝IV∝IOr, VI=RVI=R-----------(1)Or, 1I=RV1I=RVOr, I=VRI=VR----------(2)Or, V=RIV=RI ----------(3)Where R is constant for the given conductor at a given temperature and CALLED resistance. Resistance is the property of conductor which resists the flow of electric current through it.SI Unit of resistance is ohm. Ohm is DENOTED by Greek letter ‘Ω’.1 ohm (Ω) of Resistance (R) is equal to the flow of 1 A of current through a conductor between two points having potential difference equal to 1 V.This means 1Ω=1V1A1Ω=1V1AFrom the expression of Ohm’s Law it is obvious that electric current through a resistor is inversely proportional to resistance. This means electric current will decrease with increase in resistance and vice versa.The graph of V (potential difference) versus I (electric current) is always a straight line.Hope it will HELP you Please mark my answer as brainliest answer

It is any a class of MINERAL substances such as tin, copper, etc which are opaque and GOOD conductors of HEAT and electricity.Non metal - It is an element incapable of forming simple POSITIVE ions in solution. HOPE IT HELPS U and plz follow me plzzzPlzz MRK as brainliest.

dy,◆ Answer-r = 12 cm◆ Explaination-Lets consider, TWO soap BUBBLES with radius r1 = 4ncm nad r2 = 3 cm.For bubble 1 -P1 - P0 = 4T/r1P1 = P0 + 4T/4 ...(1)For bubble 2 -P2 - P0 = 4T/r2 P2 = P0 + 4T/3 ...(2)Let's, consider two bubbles merge so that-P2 - P1 = 4T/rP0 + 4T/3 - P0 + 4T/4 = 4T/r4T (1/3 - 1/4) = 4T/r1/r = 1/3 - 1/4r = 4×3 / (4-1)r = 12 cmRadius of the common bubble is 12 cm.Hope this HELPS you...

y I don't KNOW

we can USE the FORMULA of FREQUENCY that is WAVELENGTH into VELOCITY

ce the SI UNIT is NEWTON and for MOMENTUM the SI unit is kilogram metre per SECOND

r,● Answer-r = 1 ohmE = 2 V● Explanation-R1 = 9 ohmR2 = 10 ohmV1 = 1.8 VV2 = 1.9 V# Solution-Let E be emf of cell and r be internal RESISTANCE.In first situation,I1 = V1 / R1I1 = 1.8 / 9I1 = 0.2 ABut, we knowI1 = E / (R1+r) 0.2 = E / (9+r) ...(1)In second situation,R' = R1 + R2 R' = 9 + 10R' = 19 ohmIn this situation,I2 = V2 / R'I2 = 1.9 / 19I2 = 0.1 ABut, we knowI2 = E / (R'+r) 0.1 = E / (19+r) ...(2)Dividing (1) by (2),2 = (19+r) / (9+r)18 + 2r = 19 + RR = 1 ohmTherefore,E = I1 (R1+r)E = 0.2 (9+1)E = 2 VHence, emf of cell is 2 V and internal resistance is 1 ohm.Hope this helps...

orce = mass × gravitation accelerationf = 55 + 25 × 10f = 80 × 10 f = 800 Nnow ,total distance covered by the man = 50 + 20 = 70 mwork done = FORCE × displacement w = 800 × 70 w = 56000 J therefore work done by the man is 56000 J

s is 400 dB.Mark me as BRAINLEST if you LIKE my ANSWER.

tion:If T1 be the time period of pendulum 1(l=1.21) and T2 that of the 2nd(l=1m) one,We can say T1T2 = √(L1L2) or T1T2 = 1.1=1110I.e 10T1=11T2That means 10 oscillations of T1 is completed in the same time in which 11 OSCILLATION of T2 is completed . Hence after that time thay will again be in the same PHASE, i.e swinging TOGETHER.

al radiant heat energy EMITTED by a surface is proportional to the FOURTH power of its ABSOLUTE temperature (the Stefan–Boltzmann law). The RATE at which a body radiates (or absorbs) thermal radiationdepends upon the nature of the surface as well.

theory attempts to provide insight into the UNDERLYING microscopic basis for the macroscopically observed behavior of gases. In kinetic theory, a gas is assumed to consist of a very large NUMBER of molecules that move about randomly and COLLIDE frequently. At atmospheric pressure and room temperature, 1 cm3 of gas consists of approximately 3 x 1019 molecules. Although one cannot apply Newton’s laws to each molecule, one can relate the AVERAGE value of certain quantities at the macroscopic level of quantities, such as pressure and temperature, that are observable at the macroscopic level.

ature is an electromagnet made by COILING thin wire around two or more poles of a METAL core. ... The diagram at the right shows how the COMMUTATOR and brushes work together to let current flow to the electromagnet, and ALSO to flip the direction that the ELECTRONS are flowing at just the right moment.

come to know that Earth is ROTATING around it's own axis by the difference between DAY and night.Hope it helps U! If it helps mark me as brainliest.

ate,● Answer-0.0022 moles of each gas0.0044 moles for mixture● Explanation-# Given-P = 5×10^3 PAV = 2 L = 2×10^-3 m^3T = 273 K# Solution-Let n be total no of moles of mixture.According to IDEAL gas EQUATION,PV = nRT5×10^3 × 2×10^-3 = n × 8.314 × 273n = 10 / (8.314×273)n = 0.0044No of moles of each gas will be half i.e. 0.0044/2 = 0.0022 moles.Hope this HELPS...

re,● Answer-vk = 2.203×10^8 m/sva = 2.083×10^8 m/s● EXPLANATION-# Given-μk = 1.36 μa = 1.44# Solution-Velocity of LIGHT through KEROSENE is calculated by-vk = C / μkvk = 3×10^8 / 1.36vk = 2.203×10^8 m/sVelocity of light through alcohol is calculated by-va = c / μava = 3×10^8 / 1.44va = 2.083×10^8 m/sTherefore, SPEED of light in kerosene is 2.203×10^8 m/s and through alcohol is 2.083 m/s.Hope this helps...

magnets are the magnets FORMED in the nature.Limitations of NATURAL magnets:1. Limited number of uses as they cannot be TURNED into desired shape.2. The strength cannot be changed as per requirement.3.They cannot be SWITCHED OFF or ON as per requirements.hope this HELPS...pls mark it as the brainliest....