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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 2251. |
Conservation of momentum...? |
| Answer» | |
| 2252. |
1.Derive expression for variance of pressure with depth. |
| Answer» State that the pressure exerted by a liquid of density rho (p) , at a depth h is p = pgh; State the factors affecting the pressure at a point in a liquid; state the laws of liquid pressure. Pressure gauge. Derive p = pa + ρgh; Realise cross - sectional or base area or the shape do not determine Liquid Pressure. Understand that the liquid pressure is same at all points at the same depth; Hydrostatic paradox. | |
| 2253. |
Why can speed of a particle not be negative |
| Answer» because " distance can\'t be negative" but whenever we talk about velocity then it can be positive negative or may be zero just because of displacement | |
| 2254. |
Which topics are important in gravitation chapter?? |
| Answer» Msin topics which are not deleted by cbse knly<br>And for the 12th prospective??<br>All (in the eye of JEE and NEET) | |
| 2255. |
Pascal\'s law and its application (hydraulic acid and hydraulic brakes) |
| Answer» | |
| 2256. |
Avagadros law |
| Answer» U can search ..? | |
| 2257. |
Newton\'s law of motion ..? |
| Answer» Good mrng ?\u200d♀️<br>The one who said \'rahul\' in my that question is not suhana<br>For every action, there\'s an equal n opposite reaction. | |
| 2258. |
Types of energy? |
| Answer» Vdiyaaa.. aap? ?\u200d♀️<br>Gud evng ? | |
| 2259. |
Who is in the name of suhana and shreya ? |
| Answer» #Ggggg Ggg i know its you tell your real name now ! You are suhana or not ? If you respect our nation then tell me this only. Then no more questions from me<br>Human<br>Suhana has thanked this answer , it means if she doesn\'t reply she doesn\'t respect our nation. Very bad<br>Kanun ki kasam bharat mata ki kasam reply kro dono , ab nhi to desh doob jyega | |
| 2260. |
Please anyone help me in physics please ? |
| Answer» And so don\'t worry brother and sister whatever ?<br>Yes I am but I need help in rotational motion<br>Continue your bakwas in this app as you were doing not so long ago. We all know how you are and you are responsible for your failure now | |
| 2261. |
Mass of gravity |
| Answer» The centre of gravity of a body is that point where the total gravitational torque on the body is zero. The centre of gravity of the body coincides with the centre of mass in uniform gravity or gravity-free space. If g varies from part to part of the body, then the centre of gravity and centre of mass will not coincide. | |
| 2262. |
HAPPY NEW YEAR.... |
| Answer» Seraj smarkee and sowndu ko bulao<br>Ok<br>Mai fb use nhi krta bhau???<br>Happyy Neww Yearr... | |
| 2263. |
Happy new year to everyone ✨✨?? |
| Answer» Same to you broooo.<br>Same 2u bro | |
| 2264. |
Huv |
| Answer» Halloween has gone.. ??.. Huv? | |
| 2265. |
Why is pulling the lawn roller preferred to pushing it? |
| Answer» | |
| 2266. |
explain the working of a sling by vector law of addition |
| Answer» Yes, the\xa0sling\xa0based onparallelogram law of vector. ... According to\xa0parallelogram law\xa0of forces, the resultant tension T of the two tensions act on the stone along OC. As the stone is released, it shoots under the action of resultant tension T in forward direction | |
| 2267. |
2020 is going....?\u200d♂️?\u200d♀️?? |
| Answer» Kaise ho bro | |
| 2268. |
Relative density of gold is 19.32 find the density of gold |
| Answer» Relative density of gold =\xa0ρ(\u200bgold)/ρ(\u200bwater)\u200b\xa0= 19.32/1\u200b = 19.32 | |
| 2269. |
Pls tell answer fastly |
| Answer» Not test its classwork<br>Do your test honestly! | |
| 2270. |
Pls answer tell quickly |
| Answer» Hii kaise ho | |
| 2271. |
What is circular motion? Derive and expression for car on level road and banked road |
| Answer» | |
| 2272. |
What is integration and differentiation? |
| Answer» In calculus, differentiation means dividing a whole into many parts and integration means adding up several parts into whole.<br>Differentiation is the essence of Calculus. A derivative is defined as the instantaneous rate of change in function based on one of its variables. It is similar to finding the slope of a tangent to the function at a point.Integration is a method to find definite and indefinite integrals. The integration of a function f(x) is given by F(x) and it is represented by:whereR.H.S. of the equation indicates integral of f(x) with respect to xF(x) is called anti-derivative or primitive.f(x) is called the integrand.dx is called the integrating agent.C is the constant of integration or arbitrary constant.x is the variable of integration. | |
| 2273. |
Define Friction and Explain it\'s all types? |
| Answer» Friction is defined as the force that opposes the motion of a solid object over another. There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction. Friction and normal force are directly proportional to the contacting surfaces and it doesn’t depend on the hardness of the contacting surface. With the increase in relative speeds, the sliding friction reduces whereas fluid friction increases with the increase in the relative speed, also fluid friction is dependent on the viscosity of the fluid.Following are the friction types which depend on the\xa0types of motion:\tStatic Friction:\xa0Static friction is defined as the frictional force that acts between the surfaces when they are at rest with respect to each other.\tSliding Friction:\xa0Sliding friction is defined as the resistance that is created between any two objects when they are sliding against each other.\tRolling Friction:\xa0Rolling friction is defined as the force which resists the motion of a ball or wheel and is the weakest types of friction.\tFluid Friction:\xa0Fluid friction is defined as the friction that exists between the layers of the fluid when they are moving relative to each other. | |
| 2274. |
What is the gravitational potential at infinity? |
| Answer» Gravitational potential energy\xa0is the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field. In simple terms, it can be said that gravitational potential energy is an energy which is related to gravitational force or to gravity.The gravitational influence on a body at infinity is zero, therefore, potential energy is zero, which is called a reference point. | |
| 2275. |
Thermodynamic... |
| Answer» Thermodynamics in physics is a branch that deals with heat, work and temperature, and their relation to energy, radiation and physical properties of matter.<br>Thermodynamic means flow of heat | |
| 2276. |
Why does mercury not wet glass?? |
| Answer» Hindi m ans milga kya<br>Mercury does not wet the glass because the cohesive force with the drops is stronger than the adhesive force between the drops and glass.<br>Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass. When liquid mercury is confined in a tube, its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop. | |
| 2277. |
SI unit of momentum....? |
| Answer» Kgm/s<br>SI unit of momentum is Kg m/s.<br>The\xa0SI unit\xa0for\xa0momentum\xa0is kg · m/s.<br>Kgm/s | |
| 2278. |
What is science. In simple definition?(good morning to all?) |
| Answer» The study of about our nature and its component (matter living and non living things etc.) origin and their behavior is called science<br>Science is the study of the nature and behaviour of natural things and the knowledge that we obtain about them.A science is a particular branch of science such as physics, chemistry, or biology.A science is the study of some aspect of human behaviour, | |
| 2279. |
What will be acceleration when g=5m,d=2m and t=3m |
| Answer» Mera bhi 2m/s answer aarha hai??<br>I\'m new on this app so I don\'t know what it happening Sorry to all u And answers is incorrect -sorry for that<br>2m/s | |
| 2280. |
Smallest unit of time |
| Answer» Shake is the smallest unit of time<br>The unit of time is \'second\'. | |
| 2281. |
Hiw to do differentiation |
| Answer» | |
| 2282. |
Mechanical equilibrium. ? |
| Answer» \xa0For mechanical equilibrium of a rigid body, two conditions need to be satisfied:1. Translational equilibrium: The net external force or the vector sum of all the external forces acting on the body must be zero.i.e\xa02.Rotational equilibrium :The net external torque or the vector sum of all the torques acting on the body is zero.i.e\xa0 | |
| 2283. |
Merry Christmas sbko ?? |
| Answer» U2<br>Same 2u aadu<br>U 2<br>^_^<br>???? | |
| 2284. |
what ie eqibelurum |
| Answer» In a chemical reaction chemical equilibrium is defined as the state at which there is no further change in concentration of reactants and products.For example,At equilibrium the rate of forward reaction is equal to the rate of backward reaction. Equilibrium\xa0mixture:\xa0The mixture of reactants and products in the equilibrium state is called an equilibrium mixtures.Based on the extent to which the reactions proceed to reach the state of equilibrium, these may be classified in three groups:(i) The reactions which proceed almost to completion and the concentrations of the reactants left are negligible.(ii) The reactions in which most of the reactants remains unchanged, i.e. only small amounts of products are formed.(iii) The reactions in which the concentrations of both the reactants and products are comparable when the system is in equilibrium. | |
| 2285. |
Projectile motion...? |
| Answer» Mai seraj???????<br>Hello royal bhai kaise ho<br>Projectile MotionWhen any object is thrown from horizontal at an angle θ except 90°, then the path followed by it is called\xa0trajectory, the object is called projectile and its motion is called projectile motion.If any object is thrown with velocity u, making an angle θ, from horizontal, then\tHorizontal component of initial velocity = u cos θ.\tVertical component of initial velocity = u sin θ.\tHorizontal component of velocity (u cos θ) remains same during the whole journey as no acceleration is acting horizontally.\tVertical component of velocity (u sin θ) decreases gradually and becomes zero at highest point of the path.\tAt highest point, the velocity of the body is u cos θ in horizontal direction and the angle between the velocity and acceleration is 90°.Important Points & Formulae of Projectile Motion\tAt highest point, the linear momentum is mu cos θ and the kinetic energy is (1/2)m(u cos θ)2.\tThe horizontal displacement of the projectile after t seconds\tx = (u cos θ)t\tThe vertical displacement of the projectile after t seconds\ty = (u sin θ) t — (1/2)gt2\tEquation of the path of projectile\t\tThe path of a projectile is parabolic.\tKinetic energy at lowest point = (1/2) mu2\tLinear momentum at lowest point = mu\tAcceleration of projectile is constant throughout the motion and it acts vertically downwards being equal to g.\tAngular momentum of projectile = mu cos θ x h, where h denotes the height.\tIn case of angular projection, the angle between velocity and acceleration varies from 0° < θ < 180°.\tThe maximum height occurs when the projectile covers a horizontal distance equal to half of the horizontal range, i.e., R/2.\tWhen the maximum range of projectile is R, then its maximum height is R/4. | |
| 2286. |
Prove work energy theorem for a variable force |
| Answer» Lets consider a body is acted by the variable force | |
| 2287. |
computation of BMI from family or neighbour and graphical representation of the data |
| Answer» | |
| 2288. |
Energy envolved in a chemical reaction comes from |
| Answer» Pru<br>a ns w e rEnergy is involved in a chemical change because of formation and breakdown of bonds. In exothermic reactions energy is released and in endothermic reactions energy is taken in. | |
| 2289. |
Weak nuclear forces operates among |
| Answer» Weak Nuclear Force: This force appears only in certain nuclear processes such as the β-decay of a nucleus. In β-decay, the nucleus emits an electron and an uncharged particle called neutrino.This particle was first predicted by Wolfgang Pauli in 1931. | |
| 2290. |
A body which it moves 10 ms uniformly . what is its acceleration |
| Answer» Acceleration comes into play only if the body is moving non-uniformly . Otherwise it is zero. Here the body is moving uniformly. So zero acceleration.<br>Acceleration of a body moving with a uniform velocity = 0\xa0because acceleration\xa0= change\xa0in\xa0velocity\u200b/time\xa0change in velocity= 0SO, acceleration = 0 | |
| 2291. |
What are gravity |
| Answer» Naa veere Maine nhi suna iska name<br>Ankit Bhandari is a hero<br>Earth attracts all things towards it through an unseen force of attraction. This force of attraction is called as gravitation or gravitational pull. You must have noticed that every time you throw an object upwards, it reaches a certain height and then falls down on the earth\'s surface<br>Whar is force | |
| 2292. |
Define projectile motion.. |
| Answer» When a particle is thrown obliquely near the earth’s surface, it moves along a curved path under constant acceleration that is directed towards the center of the earth (we assume that the particle remains close to the surface of the earth). The path of such a particle is called a projectile and the motion is called\xa0projectile motion. Air resistance to the motion of the body is to be assumed absent in projectile motion.In a Projectile Motion, there are two simultaneous independent rectilinear motions:\tAlong the x-axis:\xa0uniform velocity, responsible for the\xa0horizontal\xa0(forward)\xa0motion\xa0of the particle.\tAlong y-axis:\xa0uniform acceleration, responsible for the\xa0vertical\xa0(downwards)\xa0motion\xa0of the particle.<br>When any object is thrown from horizontal at an angle theta except 90° , then the path followed by it is called trajectory, the object is called projectile and it\'s motion is called projectile motion. | |
| 2293. |
deduse the expression for rotational kinetic energy |
| Answer» Dffrr<br>The expression for rigid body’s “rotational kinetic energy” is\xa0SOLUTION:A body undergoing a rotational dynamics with angular velocity ω will also poses a translational motion. Let the velocity for translation motion be ‘’v’’.We know for translational motion the energy poses by body is kinetic and given asAlso we know that for a body obeying rotation v=rωSubstituting in translationAlso there is a relation for moment of inertia i.e\xa0Substituting we get,\xa0 | |
| 2294. |
deduse the expression for young\'s modulus if the mass is m and radius of wire is r |
| Answer» | |
| 2295. |
State the first and second Newton\'s law of motion along with the expression |
| Answer» when the body is in motion it will continue in motion and the body is in rest it will continue is the newton\'s first law of motion.The rate of change in momentum is directly proportional to force.so the equation will be F=ma<br>Newton’s second law of motion states that the force exerted by a body is directly proportional to the rate of change of its momentum. For a body of mass ‘m’, whose velocity changes from u to v in time t, when force ‘F’ is applied. | |
| 2296. |
The relation between linear velocity and angular velocity in vector form |
| Answer» Let us consider the randomly shaped body undergoing a rotational motion as shown in the figure below. The linear velocity of the particle is related to the angular velocity. While considering the rotational motion of a rigid body on a fixed axis, the extended body is considered as a system of particles moving in a circle lying on a plane that is perpendicular to the axis, such as the center of rotation lies on the axis.In this figure, the particle P has been shown to rotate over a fixed axis passing through O. Here, the particle represents a circle on the axis. The radius of the circle is the perpendicular distance between point P and the axis. The angle indicates the\xa0angular displacement\xa0Δθ of the given particle at time Δt. The average angular velocity in the time Δt is Δθ/Δt. Since Δt tends to zero, the ratio Δθ/Δt reaches a limit which is known as the instantaneous angular velocity dθ/dt. The instantaneous angular velocity is denoted by ω.From the knowledge of circular motion, we can say that the magnitude of the linear velocity of a particle traveling in a circle relates to the angular velocity of the particle ω by the relation υ/ω= r, where r denotes the radius. At any instant, the relation v/ r = ω applies to every particle that has a rigid body.If the perpendicular distance of a particle from a fixed axis is ri, the linear velocity at a given instant v is given by the relation,Vi\xa0= ωriSimilarly, we can write the expression for the linear velocity for n different particles comprising the system. From the expression, we can say that for particles lying on the axis, the tangential velocity is zero as the radius is zero. Also, the angular velocity ω is a vector quantity which is constant for all the particles comprising the motion. | |
| 2297. |
What are unit? |
| Answer» Units denote quantity<br>In physics unit means standard measure of a quantity.<br>Unit are basic standard to represent physical quantities. | |
| 2298. |
1 au is equal to _ ly |
| Answer» 1 au = 1.581 × 10^-5 light years<br>1.581 × 10-5\xa0light-year | |
| 2299. |
Integral (x+1/x)^3 |
| Answer» | |
| 2300. |
What is the integration and differentiation of 3xpower2 |
| Answer» Differentiation-6xIntegration-x²<br>6x | |