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When a ray of light travels obliquely from 'P' to 'Q', the refracted ray bends away from the normal.

This means that the medium 'P' is optically denser than medium 'Q' .

Kinetic Energy(K) = 1/2× mv²where, m = mass of the body and v = velocity.Now, Obtaining the Formula in terms of the Momentum.

∵ p = mv⇒ v = p/m

∴ K = 1/2 × m (p/m)²⇒ K = p²/2m⇒ p² = K × 2m

Now, Solving the Question.

∵ p² = K × 2m∴ Taking Logarithms on both the sides of the above equation.log p² = log( k 2m)⇒ 2log p = log K+ log 2m⇒ log K = 2 log p - log 2m

Now, Differentiating the both sides of the Equation,

∴ dK/K = 2(dp/p) - dm/m

∴ |dK/K|max. = 2|2/100| + |-3/100|⇒ |dK/K| = 2× 0.02 + 0.03⇒ |dK/K|max. = 0.07

∴ Maximum % Error in the Kinetic Energy K is 0.07× 100 % = 7%.

Tomatoescontain two pigments for photosynthesis—chlorophyll, which is green, and lycopene, which isred. Whentomatoesstart to grow, they contain much less lycopene than chlorophyll, whichgivesthem their greencolor.

thank you so much

Μ=real depth/apparent depth4/3=10/ADAD=10x3/4AD=7.5m

area = πr²

∆area = π2r∆r∆area/area = π2r∆r/πr² = 2∆r/r

but ∆r/r = 1% ,

so, ∆area/area = 2*(1%) = 2%

area = πr²

∆area = π2r∆r∆area/area = π2r∆r/πr² = 2∆r/r

but ∆r/r = 1% ,

so, ∆area/area = 2*(1%) = 2%

Do want a formula that relates sound and wavelength

wavelength of sound is greater than wavelength of light.

Here initial velocity is V , so initial energy is 1/2*(m)v².

niw this energy will just be converted in compression of spring and , the energy will be stored as potential energy

the compression would be 1/2*(k)*(x²) = 1/2*(m)v² => x² = mv²/k so x = V.√(m/k)

so all the energy will be stored in spring.. and no. work will be done on the wall.

also since wall is fixed so , no displacement will be there.. and in term W = 0.

F = m*g+ m*g*μk) = m*g(1+μk)

In frictionless situation μk = 0 Therefore

F = m*g = 0.010*9.806 = 0.09806 N

baby frictionless table hai

sorry sorry sorry

A mixture of two miscible liquids having a difference in their boiling points more than 25 °C can be separated by the method of distillation. Thus, kerosene and petrol can be separated by distillation. In this method, the mixture of kerosene and petrol is taken in a distillation flask with a thermometer fitted in it.

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please complete u r question.

This complete

your answer is rong

These particles are moving perpendicular to each other.

The figure of their motion is a right angled triangle.

The resultant velocity is the hypotenuse of the triangle formed.

The triangle is of base v and height vV.

By pythagoras theorem the hypotenuse is :

Hypotenuse = √(v² + v²) = √2v² = v√v

The velocity is thus :

= v√2

lanthanoids also called lanthanide any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57-71) with scandium and yttrium , they make up the rare-earth metals

According to the work-energy theorem, the net work on an object causes a change in the kinetic energy of the object. The formula for net work is net work = change in kinetic energy = final kinetic energy - initial kinetic energy.

Theforce exerted between the heavenly bodiesis gravitationalforce.As for example-As you know that Our Earthexert gravitationalforceon all object.

An externalforcemaycause a changein the state of motion, size andshape of an object. Theforcemaycause a changein the internal arrangement of molecules making up theobjectand depending upon the magnitude of theforce, the size orshapeof theobjectmaychange.

m = 200mg or 0.2 kga = 15m/s^2

we know that F = maso, F = 0.2*3F = 0.6 N

Therefore, force exerted by wall on ball is 0.6 N

It is the reciprocal of the focal length of thelenstaken in metres. Its S.I. unit is Dioptre( D ). 1 Dioptre isdefinedas thepower of a lenswhose focal length is 1 m.

Power of lens of focal length 40 cm=0.4 m=1/0.4=2.5 D

Power of lens of focal length 20 cm=0.2 m=1/0.2= 5 D

As both of the lenses have positive focal let, hence, both are convex lens or converging natured.

any one use of this theorem

Application-

In variety of cases when a spring is connected to body then in case when a spring is compressed or

elongated, it absorbs energy and stores in form of elastic potential energy which is due to the negative

work done by spring on the attached body.

So work done by spring will always be subtracted from body

energy if it absorbs energy and will be added to body energy if it releases energy.

Original gravitational force = 20 NNew gravitational force = (20 - 20 × 50%) N = 10 N

Force = Pressure × Area= Pressure × πR²= 40 Pa × π × (20/2 × 10^-2 m)²= 1.256 N

∴ Magnitude of Force exerted by pole is 1.256 N

In physics, buoyancy, is an upward force exerted by a fluid that opposes the weight of an immersed object. If the object is less dense than the liquid, the force can keep the object afloat.

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is this the best answer

For plane mirror the usual mirror formula can be used

usual mirror formula involves object distance u

image distance v and

f -the focal length

which is equal to R/2 where R is the radius of curvature.

the form of equation is

1/u + 1/v = 1/f = 2/R

the question is what is radius of curvature of a plane mirror?

if one takes the radius of curvature R to be very large compared to u and v then the curved surfaces will be planes.

so if R is infinitely large then 2/R goes to zero.

so the plane mirror formula reduces to

1/u + 1/v = 0 means u = -v

so if object is placed in front of mirror , the image will be located behind the mirror.

however as the formula is trivial so its not used. but when several media gets coupled to plane mirror this concept is used .

jdur don't don't drive to that conclusion and the dots all India to is to is smaller

fisherman are fishing

fisheries are fishing

is the correct answer fishing

For a charge (q) moving with a speed v under the influence of a magnetic flux density of B, the force (F) exerted is given asrnrnF = q (v x B)rnorrnB = F / qVrndimensionallyrn[B] = [MLT-2] / [AT].[LT-1]rnso, [B] = [MT -2 A -1 ]

tnku

increases with richer mixes

higher/richer the mixes more would be poisson ratio

the answer is area density/ areal / surface density

pressure ,,,,,,,,,,,,

of the aboveWhen a current is passed through the loop there is neither repulsion nor attraction.

p (x) = x3 + 2x2 + kx + 3यह देखते हुए कि p(3) = 21 यानी, 27 + 18 + 3k + 3 = 21 3k = -27 k = -27 / 3 = -9

p (x) = x3 + 2x2 + kx - 18 = x3 + 2x2 - 9x - 18 जब x = -2, p (-2) = 0 यानी, x + 2 एक कारक है, x (2) को x + 2 से विभाजित करते हुए, हम प्राप्त करते हैं, x2 - x - 6 = (x - 3) (x + 2) इसलिए x3 + 2x2 - 9x - 18 के शून्य -2, 3 हैं