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Specific resistance of a conductor is the resistance of a conductor of unit length and unit area of cross section.Specific resistance is a property of a material while resistance is not.Resistance increases with length and decreases with area of cross section, but specific resistance does not.

Mathematically specific resistance is given by,p=(RA)/LWhere,p is Specific resistance/ resistivityR is ResistanceA is cross sectional area of the materialL is length of the material

sg= density/ density of waterdensity= sg× density of waterdensity of water=1g/cm^3=1000kg/m^3density=2.5×1000kg/m^3

The specific resistance increases with increased length.

Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

Definition of capillarity : the action by which the surface of a liquid where it is in contact with a solid (as in a capillary tube) is elevated or depressed depending on the relative attraction of the molecules of the liquid for each other and for those of the solid.

strain option A

strain = ∆l/l

ratio of density of body : water = 3:1 , so, water will exert a force of Dw*v*g and gravity force will be Db*v*g Fw/Fg = 1/3

=> Fw = Fg/3

Net force acting downward = Fg -Fg/3 = 2Fg/3 = 2*mg/3

so, work done will be net force × displacement= 2*mg/3*5= 2*5*10*5/3= 500/3 J

can you give me formula then I will answer

Given :

resistivity of the conductor = 44 * 10^-8 ohm m.

R = 14 ohm

Diameter = 1mm

Area = πD^2/4 = π/4 * (10^-3)^2 m^2

we know that,

length of wire = resistance * area/ resistivity of the conductor

=. 14 * π/4 * (10^-6)* 1/44*10^-8

= 14 * (22/7*4 )* 10^-6 *1/44*10^-8

= 14 * 22/28 * 100/44

= 22/2 * 100/44

= 100/4

= 25m

Work done = pressure x change in volume= 1.013 x 10^5 x (1670 x 10^-6 m^3)= 169.2 J (correct to 4 significant figures)

Increase in internal energy = latent heat of vaporisation - work done by the water.= 2.256 x 10^3 - 169.2 = 2087 J (correct to 4 significant figures)

in denser medium speed of light decrease so in medium B speed of light will be less than 2.5 x 10^8.

1-The colour of the sky is due to the property of dispersion of light the white light of the colour before reaching the earth's surface gets dispersed into its 7 components VIBGYOR the molecules present in the atmosphere are capable of scattering only the light with the shortest wavelength and hence red light won't get scattered2-The sky is blue not because the atmosphere absorbs the other colors, but because the atmosphere tends to scatter shorter wavelength (blue) light to a greater extent than longer wavelength (red) light. 3-Blue light from the sun is scattered every which way, much more so than the other colors, so when you look up at the daytime sky you see blue no matter where you look. 4-This scattering is called 'Rayleigh scattering'; the amount of scattering goes as the frequency of the light to the 4th power. 5-By the way, this effect is most prevalent when the particles that do the scattering are smaller than the wavelength of light, as is the case for the nitrogen and oxygen molecules in the atmosphere.

option (2) is correct.

d] coulomb is the right right

The S.I unit of electric charge is (D) Coulomb .

The S.I unit of charge is (d) colulomb

B) is the correct answer

c) is the correct answer

A) is the correct answer

d) coulamb is the right answer.

the situation is shown in the figure-

hence, option (A) is correct.

Answer is a

let the mass z be keptata disance of y units from m,

hence the distance from 4m will be (d-z)units

now since the attractive force from both the masses is equal and opposite so

Gmz / (y2)= G4mz / (d-y)2

or, 1 / y2 = 4 / (d-y)2

or, 1/ y = 2 / (d-y)

or, 2y = d-y

or, 3y = d

or y = d /3

hence the mass should be kept at distance of d/3 units form m particle.

how did 4m became 2m in the next step

please specify the step where u have problem

1/y = 4 /(d-y)2y = d- y it is 4 in the first step nd then how did 2 came in next step

(i)If the coils are further apart from one another, then the amount of magnetic flux from the first coil to the second coil would decrease, so the mutual inductance will decrease.(ii) mutual inductance is directly proportional to the number of turns. So if the number of turns is increased, the mutual inductance increases.

In a step up transformer, N2/N1 = V2/V1

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Dil Le Gaya pardesi Koi rokna tha kya hoga hoga Mera sochna tha

Dil Le Koi rokna tha kya hoga hoga Gaya pardesiMera sochna tha

thanks but i have not studied the concept of positive and negative mass so if u could please do it another way it would be appreciated

This structure is known as the nucleolus.

7) option (4) is correct

6) option (c) is correct

1) c7) d

Equivalent wt. of dibasic acid = mol. wt/2 = 200/2 = 100 Strength = 0.1 N, m = ? , V = 100 mL then, m = EVN/1000 = (100 x 100 x 0.1)/1000 = 1gm.

Mass of nucleus is Ainitial velocity=0velocity of alpha particle is vlet the recoil velocity be vc.Initial momentum of system is 0.Final momentum, P= (A-4)*vc-4v{A-4 as the alpha particle escapes, so we need to subtract its mass}therefore, (A-4)*vc-4v=0So, vc=4v/(A-4)so answer is (A)

Mechanical equivalentof heat (J) is dimensionless quantity. SIunit of Mechanical equivalentof heat (J) is Joules/calorie (J calorie-1 ).

the answer is energy

Current is right b...

a) charge is correct answer

charge is the best ans

b) is the right answer of the following

Current is the correct answer

Forced I'd right answers