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The velocity of light will be constant in this case as the same medium is considered.

As the frequency is inversely proportional to the wavelength of light,the wavelength will decrease by 25%.

Hence, option (D) is correct.

option 3

As the block is moving with some initial velocity it must be having must KE.

Finally it comes to rest so kinetic energy final will be zero.. it ll have some potential energy.

As frictional force is also given it will some work done by friction.. applyling the work energy theorm...

Work done(external force) + work done (non conservative force ) = change in kinkinetic energy+ change in potential energy.

0 + 15x = kf - ki + pf - pi. 0 + 15x = 0 + 1/2mv2 + k/2x² - 0.

On putting the values you get a qquadric equation i.e, 5000x² - 15x -16=0 solving this equation

x = 0.056m or 5.6 cm

hence, option (b) is correct

Work done = Force x displacementAs force is changing with the displacement we have to take a small element dx and then integrate it from x=0 to x= x1.

Work = intergration( Cx * dx) from x =0 to x= x1

(1/2) * Cx^2 and putting values of definite integration we get.Work = C x1^2 /2.Option b

Ionization potentialBinding energy per nucleons is very less for Cs, so its ionization enthalpy is low..

The answer is option C

Racemisation means the two products i.e, product with inverted configuration and of same configuration as of reactant produced in equal amounts. 70 % racemisation means 35 % is of inverted configuration and 35 % of the same configuration will be produced. Remaining 30 % will be of the same configuration since no racemisation will take place in 30 %. So inverted product will be formed from only that 70 %. Thus % of inverted product will be 35%.

answer is 65

horizontal force on body = normal reaction force = 10 N

so frictional force = 10 x 0.2 = 2N which just counteracts the weight of the body therefore weight of the body is also 2N

you are from which school??

what is accounting?explain features of accounting

If the width of the slits are A₁ and A₂, the amplitude will also be A1 and A2.

The maximum amplitude, A' will happen when constructive interference happensA' = (A₁ + A₂)The maximum amplitude, A will happen when destructive interference happensA = (A₁ - A₂)

We know that intensity is proportional to the square of amplitude.I1/I2 = A'^2/A^2 9/25 = [(A1+A2)/(A1-A2)]^2(9/25)^1/2 = (A1+A2)/(A1-A2)(A1+A2)/(A1-A2) = 3/5A1/A2 = 5+3/5-3 = 8/2

A1:A2 = 4:1

Magnetism is produced by electric current. A magnet will always have a pair of poles, a north and a south because magnetic field lines are continuous and always form closed loops. Each magnetic field line is directed from the north pole to it's south pole.If we break a magnet in half,then both halves will have a north and a south pole.

error =3*1+2*3+4/2+2/2=3+6+2+1=9+3=12

Relative error = Summation of [absolute power of each variable * Error for each variable]= (0.5*2) + (2*1) + (3*3) + (5*4)= 32 %

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Time constant = L/R

Given time constant = 2x10^-3 and R = 90 ohms

Therefore L = 2x90 x 10^-3 = 180 x 10^-3

When T = 0.5 x 10^-3, R = 180x10^-3 /0.5 x 10^-3 = 360 ohms

Time constant = L/R

Given time constant = 2x10^-3 and R = 90 ohms

Therefore L = 2x90 x 10^-3 = 180 x 10^-3

When T = 0.5 x 10^-3, R = 180x10^-3 /0.5 x 10^-3 = 360 ohms

Given:The time dependence of physical quantity Pis found to be of the form

p=poexp(-α t2)

αt2 is dimensionless

Therefore:α=1/t2=1/[T2]=[T-2] or[T⁻²]

Conclusion :constant α will[T-2] or[T⁻²]

Both are the units for measurement of pressure1 bar = 1 atmospheric pressure = 760 mm of Hg Column= 10^-5 N/m^21 Torr = 1mm of Hg Column1.01 bar = 760 Torrthis is the relation between them

Time constant is RChence option c

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In aseries RC circuit,the time constantis equal to the total resistance in ohms multiplied by the total capacitance in farads. For aseriesL/Rcircuit, it is the total inductance in henrys divided by the total resistance in ohms.

In aseries RC circuit,the time constantis equal to the total resistance in ohms multiplied by the total capacitance in faradsanswer is c part.

You can easily calculate the partial pressure of oxygen keeping in mind the definition of partial pressure.

First of all You have the find out the mole fraction of the oxygen and we know that mole fraction can be calculated from percentage composition of the gas divided by the total percentage of all gases

So here oxygen is 21% = mole fraction of 21 % oxygen =21/100 = 0.21

Here total pressure is give which is =750mm of Hg

Partial pressure of oxygen will be = 750 *0.21 = 157.5 mm of Hg

So partial pressure of oxygen will be 157.5 mmHg

Time constant is RC=100*10^3*100*10^-6=10^7*10^-6=10s

Na2O2 is diamagnetic in naturesince it does not have unpaired electrons in the molecular orbital. Is in a molecular orbital, there is an existence of unpaired electrons, the molecule formed is referred to as paramagnetic innature.

Potassium has one extra full electron than the noble gas electronic configuration between the nucleus and the outermost electron. Thus, in potassium, theoutermost electron is better shielded from the attractive force of the nucleus. It follows, therefore, that this outermost electron is more easily lost than it is in sodium, so potassium can be converted to ionic form more readily than sodium. Hence, potassium is more reactive than sodium.Secondly,on moving down the group, theatomic size increases and the effective nuclear charge decreases.Because of these factors, the outermost electron in potassium can belost easily as compared to sodium. Hence, potassium is more reactivethan sodium.

Diamagnetic materials are characterized by constant, small negative susceptibilities, only slightly affected by changes intemperature

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No force is required for An object moving in elliptical path, because in elliptical path only applied force is gravity no other force is required.

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(c) Between the focus and the centre of curvatureFor an object placed between the focus and the centre of curvature, the real image formed by a concave mirror is larger than the object

The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton.

For example, an object with a mass ofone kilogramhas a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon.

Thecenter of gravity(CG) of anobjectis the point at which weight is evenly dispersed and all sides are in balance. A human'scenter of gravity canchange as he takes on differentpositions, but in many otherobjects, it's a fixed location

aberration for an object at infinite at (C)

observation for an infinite at (c)

D) is the correct answer

a) is correct answer

c) is the right answer of the following

As the electron beam is coming from rear side of the picture tube to the screen. Hence, the direction of electric current (direction of flow of positive charges) will be directed from the front screen to the rear side of picture tube.

As the electron beam is coming from rear side of the picture tube to the screen. Hence, the direction of electric current (direction of flow of positive charges) will be directed from the front screen to the rear side of picture tube.

(a) real(b) virtual