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It is defined as the degree up to which a fluid resists the flow under an applied force. it is measured by the tangential friction force acting per unit area divided by the velocity gradient under conditions of streamline flow.f = ηAdV/dx

Here,

η is coefficient of viscosity

dV/dx is velocity gradient

If light travels from one medium with refractive index ni and incident angle i, to another medium with refractive index nr and refraction angle r, then the relationship is described by Snell's Law as such:nisin(i)=nrsin(r)

which can be rewritten like this:sin(i)/sin(r)=nr/ni

The case where light travels from a denser to rarer medium, then the only change would be that now ni>nr in which case the above equation would yield the index of refraction of the rarer medium in relation to the denser medium.

(a) sini > sinr is correct option

Pressure is a applied force to the unit area. Its SI unit is Pascal or Newton per metre square. So it's dimensional equation is [ML^-1T^-2] .

option b

velocity is increased

Nice

when the light enters to denser medium from rarer it bends towards the normal hence angle of refraction decreaseshence option a

Dimensional Formula of Impulse= M1L1T-1option b

Here's the solution.

For dimensional formulas, if you know the unit of the physical quantity, then you can write the dimensional formula very easily.For e.g. for g, we know that it's unit is m/s^2 , so it's formula is [LT^(-2)]

I hope you know about Young's Modulus. It is the ratio of Strain to Stress.

Y has the same dimensions as that of pressure

c is the correct answer for this question

option c is correct here in the correct answer for this question

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Anelastic modulus(also known asmodulus of elasticity) is a quantity that measures an object or substance's resistance to being deformed elastically (i.e., non-permanently) when astressis applied to it. The elastic modulus of an object is defined as theslopeof itsstress–strain curvein the elastic deformation region:[1]A stiffer material will have a higher elastic modulus. An elastic modulus has the form:Young's modulus = stress/strain.

wherestressis the force causing the deformation divided by the area to which the force is applied andstrainis the ratio of the change in some parameter caused by the deformation to the original value of the parameter. If stress is measured inpascals, then since strain is a dimensionless quantity, the units ofλwill be pascals as well.

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A solar eclipse occurs when an observer passes through the shadow cast by the Moon which fully or partially blocks the Sun. This can only happen when the Sun, Moon and Earth are nearly aligned on a straight line in three dimensions during a new moon when the Moon is close to the ecliptic plane.

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Current I = 2/4= 0.5 ampand as all resistance are same so same current will flowso ammeter reading= 0.5

current l =2/4=0=5 ampand as all resistance are sameso same current will flow so ammeter reading= 0.5

I=V/R.....?=2/4=0.5A.

Pascal's law is a principle in fluid mechanics that states that pressure at a point, has infinite direction, and thus a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.

A change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid.

Therefore,Pascal's lawcan be interpreted as saying that any change in pressure applied at any given point of the fluid is transmitted undiminished throughout the fluid.

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1 (a)2 (c)3 (a)4 (d)5 (c)

41metre is the distance travelled by the particle in after 5 seconds

The correct answer of this question = 2103 m/sec.

Height = 1/2*g*t² = 10*4*4/2 = 80m

A landfill is a large deep hole in which very large amounts of rubbish are buried.

I have take g=10m/s^2taking g=9.8m/s^2the answer will be 39.2

Rag pickers or servants called Safai karamcharis

unit of power isjoules/secondformula ispower=work done/timepower is the rate of doing work

Given the position is (-6,-4,-12)

so, the vector R = -6i-4j-12kalso |R| = √(-6)²+(-4)²+(-12)² = √36+16+144 = √196 = 14

so, unit vector is given by = R/|R| = -6/14i -4/14j -12/14k= ±1/7(3i+2j+6k)

option C

its a wrong answer

it should come 7√2 units

A X B = I j k 1 3 2 3 2 3This is in matrix formNow open itI (6-4)-j(-3)+k(-4)2i+3j-4kThanks

For that , vector..

the magnitude should be equal to that of |B| = √4²+3² = 5

and direction should be of A or unit vector of A = (i-j)/√1+1 = (i-j)/√2

so, that vector is = magnitude* direction = 5*(i-j)/√2

option A.

thebowler runs from a long distancebefore he is throwing a ball towards thebatsman. such that he is in high motion. ... although thebowlerstops, the ball travels by continuing its motion upto somedistancehigh with the inertia. this is becauseofthe ball is still have its momentum and inertia

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