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Let us suppose the following things,Mass of smaller ball, m₁ = 2kgMass of larger ball, m₂ = 3kgCombined mass of two balls, m₃ = 5kg

Initial Velocity of Smaller Ball, u₁ = 36 km/h = 10m/sInitial Velocity of Larger Ball, u₂ = 0 m/sFinal Velocity of both balls combined, v = (?)

By, Law of Conservation Of Momentum, (For this case)

m₁u₁ + m₂u₂ = m₃v∴2 * 10 + 3 * 0 = 5 * v∴20 + 0 = 5v∴5v = 20∴v = 4 m/s

Thus, the final velocity of both the balls moving as a single mass should be 4 m/s.

Now, let us suppose the following,

Initial combined velocity, v₁ = 10 m/s (Larger ball was at rest)Final combined velocity, v₂ = 4m/sCombined Mass, m 5kgInitial Kinetic Energy, K₁Final Kinetic Energy, K₂

Change in Kinetic Energy,ΔK = K₂ - K₁ = 1/2 mv₂² - 1/2 mv₁² = 1/2 m (v₂² - v₁²) = 1/2 * 5 (4² - 10²) = 5/2 * (16 - 100) = 5/2 * (-84) = 5 * (-42) ∴ΔK = -210 J

Thus change in Kinetic Energy is 210 J.

please specify the question which should be answered, and please is also not clear

It is proportional to square of distance between then (r^2).

The answer is Option 2.

output : 10explaination:total = 0at the end of tge execution of do-while loopsum =10 o/p= total + sum =0 +10= 10

thanks

thanks

body is kept on smooth inclined plane of inclined 1 in x.if we let inclined angle issintheta=1/xthen,tantheta=1/√x^2-1do

now, draw free body daigram as shown in figure,so,macostheta=mgsinthetaa=gtantheta

now puttantheta=1/√x^2-1so,a=g/√x^2-1

Suppose a spherical body of radius r moves at speed v through a fluid of viscosityƞ,viscous force F acting on the body depends on r,v andƞ.According to the dimensional analysis we can write,

Let F =kravbƞ​c

Where k is the dimensional less constant.

MLT-2=kLa(LT-1)b(ML-1T-1)c

On equating the coefficients of M,L,T on both sides we get :a,b,c each = 1hence F =krvƞ,value of k =6π,hence stokes law becomes,

F =6πƞrv

This is the required stokes law

Strokes law:

The force that retards a sphere moving through a viscous fluid is directly ∝to the velocity and the radius of the sphere, and the viscosity of the fluid.

Ans :- OF1=Focal length=fOA=object distance=uOA'=image distance=vTriangle OAB similar to Triangle OA'B'angleBAO=angle B'A'O=90°so, angle AOB=angleA'B'OA'B'/AB=OA'/OA ---------------(1)

Triangle OCF1 similar to Triangle F1A'B' A'B'/OC=A'F1/OF1OC=ABA'B'/AB=A'F1/OF1=OF1-OA'/OF1A'B'/AB=OF1-OA'/OF1---------------(2)

from eqn 1 and 2 we get OA'/OA=OF1 - OA'/OF1-v/-u= -f-(-v)/-fv/u= f+v/f-vf=-uf+uv

on dividing both sides by uvf we get 1/u=1/v+1/f1/v-1/u=1/f

magnification m=height of image /height of object or m=v/u

Lens formula1/f = 1/v - 1/uwhere ,f = focal lengthv = image distanceu = object distance

Option (1) is correct.

option 1 is correct...I want reason

resistance= voltage/ current =( (nV)/i) ohms

Jouleis a unit for work done andcoulombis the unit for the charge. The potential is defined as the ratio of the work done to the charge and the unit of the potential difference is volt. Hence, onejoulepercoulombis equal to the unit of the potential difference. Therefore it will be equal to one Volt.

(ii) 0.8 Å

Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to an object to the resulting temperature change.

The coefficient of friction = tan ∅ So, your angle would be 30 degree.........

The answer is Option 4. Replace the p by alpha

why

i dont understand

tell me

Let the dist be x and the rest is in the image. Hope my handwriting is understandable and the answer is correct! Have a nice day!(~￣△￣)~

Let the dist be x and the rest is in the image. Hope my handwriting is understandable and the answer is correct! Have a nice day!(~￣△￣)~

yes

tan∅ = 0.75 => ∅ = tan-¹(3/4). = sin-¹(3/5) = > sin∅ = 0.6so, ∅ = 37°

mass A will move only due to the frictional force acting on it... amd the value will be μmg

acceleration A , when after Time = 10sec

M.a = μMg

=> a = μg => 4.9 = μ*(9.8)=> μ = 4.9/9.8 = 0.5

option 1

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Lens maker's Formula: It is a relation that connects the focal lengthof a lens to radii of curvature of the two surfaces of the lens and the refractive index of the material of the lens. following assumption are considered while deriving lens maker's formula for concave lensa) only point object is takenb) the aperature of the lens is smallc) the lens is thin

All the terms in the equation should have same dimensions. [s] = L[ut²]=LT⁻¹×T² = LT¹

Hence, the equation is dimensionally incorrect.

Answer isconductance gets Halvedwhenlength of conductor is doubled(if you need the reason please read explanation below)Conductance = 1 / ResistanceWhich means as resistance increase conductance will decrease {ORwhen resistance decrease conductance increase }Here length is doubledwe know That when length of a conductor is doubled resistance also gets doubled .

So as Resistance gets doubled Conductance gets Halved

Energies in which electrons revolve in a shell is fixed. Hence, bhor's orbit are called stationary states.

Focal length will increase with the increase in the radius of curvature

A nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g., uranium-235, 235U). The nuclear chain reaction releases several million times more energy per reaction than any chemical reaction.

History

Fission chain reactionEdit

Fission chain reactions occur because of interactions between neutrons and fissile isotopes (such as 235U). The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of some of these neutrons in fissile isotopes. When an atom undergoes nuclear fission, a few neutrons (the exact number depends on several factors) are ejected from the reaction. These free neutrons will then interact with the surrounding medium, and if more fissile fuel is present, some may be absorbed and cause more fissions. Thus, the cycle repeats to give a reaction that is self-sustaining.

Nuclear power plants operate by precisely controlling the rate at which nuclear reactions occur, and that control is maintained through the use of several redundant layers of safety measures. Moreover, the materials in a nuclear reactor core and the uranium enrichment level make a nuclear explosion impossible, even if all safety measures failed. On the other hand, nuclear weapons are specifically engineered to produce a reaction that is so fast and intense it cannot be controlled after it has started. When properly designed, this uncontrolled reaction can lead to an explosive energy release.

Object distance=-50 cm(applying sign convention)Since the image distance is lesser than the object distance and a virtual image is formed, it's a concave lens.(v=-10)We are supposed to use lens formula:-1/f=1/v-1/uf is -vev is -veu is -veon simplifying we getf=25/4 or 6.25 cm.magnification=-(v/u) =-10/50=-0.2

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planet surface would increase because

The acceleration due to gravity at the surface of earth is g = G m / R2 .

The radius of earth decreases by 2 %, therefore

R' = R - 0.02 R = 0.98R.

Now acceleration due to gravity will be :

g' = GM / ( 0.98 R )2 = 1.04 g

Percentage increase in acceleration due to gravity

[(g' - g )/g ] x 100 = 4 %

1/f = 1/u + 1/v

where object distance (u), image distance (v) and focal length(f).