Saved Bookmarks
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 9651. |
Proof of keplers third law from gravitation |
|
Answer» Note that Newtons law of gravitation was much much more fundamental than keplers third law of planetary motion intact the first aim of the gravitational law was to explain the falling Apple and keplers observationF=GMm/R2F=GMm/R2 where MM is mass of the sun and mm is mass of planetRoughly approximating a circular orbitGMm/R2=mv2/RGMm/R2=mv2/Rv=(GM/R)−−−−−−−√v=(GM/R)T=(2πR)/vT=(2πR)/vT2=(4(π)2/GM)(R3)T2=(4(π)2/GM)(R3)T2=kR3 , thus, T2 is proportional to R3. This Is also known as law of period according to the law the square of time period of rotation of a planet is proportional to the cube of semi Major axis of the ellipical radius of orbit T square is proportional to cube of radius |
|
| 9652. |
The number of significant figures in 0.00630m2 |
|
Answer» 3 3 3 3 significant figure |
|
| 9653. |
Why direction of centripetal acceleration is always towards centre |
| Answer» | |
| 9654. |
I want to make a working model in physics related to chapters |
|
Answer» But what You can make model on work energy and power chapter |
|
| 9655. |
Where is optics notes in 11 in this app? |
|
Answer» It\'s also my pleasure to help others ????? Yah...thanks??. ..........just joking... Its my pleasure to help others.... Yes u are right aman Its better u go for class 12 th notes....of optics There is no notes in this app |
|
| 9656. |
Can static frication do nonzero work on an object?if yes give an example. If no,give reason. |
|
Answer» Thank you In limiting friction body does not gain displacementso work done zero Static friction is a non-conservative force, and therefore has no associated potential energy. When static friction is internal, however, it is a non-dissipative force, performing zero net work on the chosen system. The reason is that static friction guarantees that the two interacting objects will undergo the same displacement. Thus, the work done on the two objects will cancel by Newton\'s Third Law. |
|
| 9657. |
Relation between linear velocity and angular velocity. |
| Answer» Linear velocity is defined as the rate of change of displacement. The unit of linear velocity is m/s.Angular velocity of a body is the rate of change of angular displacement over a period of time. The unit of angular velocity is rad/s.\xa0 | |
| 9658. |
What do you mean by thermodynamic |
| Answer» Thermo means temperature and dynamics means same Thermodynamics is the branch of physics that has to do with heat and temperature and their relation to energy and work. The behavior of these quantities is governed by the four laws of thermodynamics, irrespective of the composition or specific properties of the material or system in question. | |
| 9659. |
What is newton laws of cooling |
|
Answer» Thanku ???✌️ Ankit the rate of heat loss of a body is directly proportional to the difference in the temperatures between the body and its surroundings provided the temperature difference is small and the nature of radiating surface remains same ??? good answer avneet Newton\'s law of cooling states that the rate of heat loss of a body is directly proportional to the difference in the temperatures between the body and its surroundings provided the temperature difference is small and the nature of radiating surface remains same. |
|
| 9660. |
What is Reynold number.? |
| Answer» \tReynolds number is a dimensionless number, whose value gives an idea whether the flow would be turbulent or laminar.\tTypes of flow are classified as 2 types:laminar flow and turbulent flow.\tReynolds number helps us to determine whether the flow is laminar or turbulent. | |
| 9661. |
What is shearing stress |
|
Answer» In simple word , restoring force acting per unit area tangentially /longitudinally .....is called shear stress Shear stress is the amount of force per unit area perpendicular to the axle of the member. When you stepped on the wooden stick really hard, the impact load on the stick caused two types of stresses:\tBending stress, also called flexural stress, is parallel to the axle of the member\tShear stress is perpendicular to the axle of the member. |
|
| 9662. |
What is conservation of angular momentum |
| Answer» Conservation of angular momentum is a physical property of a spinning system such that its spin remains constant unless it is acted upon by an external torque; put another way, the speed of rotation is constant as long as net torque is zero. | |
| 9663. |
What is velocity gradient |
|
Answer» The rate of change of velocity with distance is called velocity gradient.Consider an orderly flow of liquid over a fixed plane consider its two layer separatef by a distance dx having velocitied v and v+dv Then Velocity gradient =[(v+dv)-v]/dx =dv/dx Dv/Dz dv/dx |
|
| 9664. |
what is the value of G?????? |
| Answer» G = Universal Gravitational Constant=6.67×10^-11Nm^2kg^-2 | |
| 9665. |
What is the relation between momentum and KE |
| Answer» KE=P^2/2m | |
| 9666. |
I am unable to find the time period of kinetic energy of SHM |
| Answer» You can refer SL Arora of class 11 physicsthe time period of the satellite is equals to circumference by velocity where c is equals to 2 by 4 bracket of Audi + 1 by root of GRE square by r d plus h and the final answer will be as 85 minutes | |
| 9667. |
Define zero erorr |
| Answer» it is a type of error in which an instrument gives a reading when the true reading at that time is zero. | |
| 9668. |
Explain about the impulse |
| Answer» Impulse is a term that quantifies the overall effect of a force acting over time. It is conventionally given the symbol J\\text{J}J and expressed in Newton-seconds. When we calculate impulse, we are multiplying force by time. This is equivalent to finding the area under a force-time curve.For a constant force, F×ΔtJ = F.Δt | |
| 9669. |
Physics best youtube channal Tell me |
|
Answer» Physics wallah ?✌️ Yaa.. it\'s a good channel Physicswallah |
|
| 9670. |
explain plateaus experiment |
| Answer» plateau is a flat area of land that is elevated above sea level. The word is French for \'table land,\' and that term is also used for some smaller landforms that will be discussed further into this lesson. Plateaus aren\'t all perfectly flat, but they do have low relief; relief means the elevation change across an area. | |
| 9671. |
What is an aerofoil? |
|
Answer» More about aerofoil An aerofoil (an aircraft wing) is shaped so that air flows faster along the top surface than the lower surface. |
|
| 9672. |
What is radius of gyration? |
| Answer» Radius of gyration of a body about a given axis is the perpendicular distance of a point from the axis, where whole mass of the body were concentrated, the body shall have the same moment of inertia as it has with the actual distribution of mass.\xa0The units for radius of gyration are length (that is millimeters or inches or feet). It is the square root of the moment of inertia I divided by the area A, (I/A)0.5. I is length4, A is length2, (I/A)0.5 being simply length. | |
| 9673. |
What are the important questions of thermodynamics ? |
| Answer» | |
| 9674. |
Please tell me all the important derivations of all chapters so that I can get pass marks??? |
|
Answer» Now tell me otherwise it wil be too late for me Now it is possible ??? Ch 3Ch 4Ch 5Ch 7Ch 8Ch 9Ch 10 ????yakshi It will be easy for us to tell u if u will ask it chapterwise........we will tell u then......??? |
|
| 9675. |
What is wein\'s displacement |
| Answer» Acc. to the weins disolacement ," the max. wavelength corresponding to max. energy is inversely proposnal to the absolute temp. of the body." | |
| 9676. |
Why machinery parts get jammed in winter ?? |
|
Answer» Good answer By the way, the question is also nice? Ooooo...that good..but yaa lets leave this topic otherwise they will again start blocking? mind my words I am a that type of girl Jo teen saal purani baat v yaad rekhti hai,, ??? tum toh bus 1 saal purane hoo.. ? ? nooo not at all... ? stupid.. ? ? ? Gd answer darshana...Hope you had not forgot the person who always use to say genius..to him? In winter due to low temp. the coefficient viscosity of lubricant increases as a result machinery parts get jammed.. |
|
| 9677. |
Explain zeroth law of thermodynamics ? |
| Answer» According to this law,when themodynamics systems A and B are separately in thermal equilibrium with athird themodynamicsytem C, then the systems A and B are in themal equilibrium with each other also. | |
| 9678. |
Simple pendulum define? |
|
Answer» A simple pendulum consists of a small metal ball (called bob) suspended by a long thread from a rigid support, such that the bob is free to swing back and forth. A simple pendulum is defined as an object that has a small mass (pendulum bob), which is suspended from a wire or string having negligible mass. \tWhenthe pendulum bob is displaced it oscillates on a plane about the vertical line through the support.\tSimple pendulum can be set into oscillatory motion by pulling it to one side of equilibrium position and then releasing it. |
|
| 9679. |
State the various units of atmospheric pressure |
|
Answer» Atmospheric pressure is expressed in quite a number of units.1) Atmosphere (atm) : Naturally the easiest. Ambient pressure = 1 atm.2) Bar : Popular, yet non-SI unit. 1 atm = 1.01325 bar (source: google!)3) Pascal : The SI unit of pressure, but not very popular in Earth sciences. 1 atm = 101.325 KPa (no wonder it’s unpopular)4) Torr : Manometric unit of pressure (mm column of Hg). Quite old. Almost no significance today. 1 atm = 760 Torr5) psi (pounds-per-square-inch): Also informal. Prevalent form of pressure measurement. However, not very popular in Earth sciences or meteorology. 1 atm = 14.6959 psi. Atmosphere is a mixture of different gases. All these gas molecules together constitute some weight. By virtue of this weight there is some pressure exerted by the atmosphere on all the objects. This pressure is known as atmospheric pressure.Units of Pressure:-1.SI unit: Pascal (Pa)\tPressure is always measured by taking sea level as the reference level. At sea level P=1.01*105 Pa.\tAtmosphere (atm)\tReference level is at sea level.Pressure equivalent of 76cm of Hg column1atm=76cm of Hg column1atm=1.01*105 Pa\t\t |
|
| 9680. |
व्हाट इज लार्जेस्ट प्रैक्टिकल यूनिट 4 लेंथ |
| Answer» | |
| 9681. |
How do you visualize Electro-magnetic waves? Like you do for atoms and sound waves. |
|
Answer» The flow of energy at the universal speed of light through free space or through a material medium in the form of electric and magnetic fields that make up electromagnetic waves such as radio waves, visible light and gamma rays. Sorry, But what exactly is the thing that oscillates .....as there are molecules in other waves. I want to know what these waves are?...like what are they made of? Are those waves actually like some kind of energy like thing? Electromagnetic waves that compose electromagnetic radiations can be imagined as a self-propagating transverse oscillating waves of electric and magnetic fields. |
|
| 9682. |
What are geo stationary satellite |
| Answer» Satellite revolve in geo stationary orbit. | |
| 9683. |
Can vector A + vector B = vector A - vectorB |
| Answer» Yes it can be equal if one vector is zero | |
| 9684. |
What is prograssive wave? |
|
Answer» Nice answer Priya A wave which travels continuously in a medium in the same direction without any change in its amplitude is called a progressive wave or a traveling wave. |
|
| 9685. |
Why this,absilute zero is not crresponsig zero |
| Answer» | |
| 9686. |
What is conservative and non conservative forces |
| Answer» Conservative forces are those forces which does not depends upon path ...they only depends upon initial and final point...for ex- spring force,etc.Non-Conservative forces are those forces which depends on path...for ex- friction force, viscous force...etc.. | |
| 9687. |
What is Bernoulli\'s theorem derive its expression |
| Answer» Here.??..check it in revision note section or in videos .....?? | |
| 9688. |
Derivation of P=1/3mc2/v |
| Answer» | |
| 9689. |
Two resistors of resistances |
| Answer» | |
| 9690. |
Derivative formula of SHM. |
| Answer» | |
| 9691. |
Please tell me the important topics of properties of bulk matter |
| Answer» ✴️Elastic behaviour of solids✴️ Stress and strain✴️ Hooke’s law✴️ Young’s modulus, bulk modulus, shear modulus of rigidity✴️ Poisson\'s Ratio, Elastic Energy... that\'s it. | |
| 9692. |
How to use money gained by refering in mycbseguide |
| Answer» | |
| 9693. |
Hii frndsswhich is ur fav chapter in physicsanyone ready to help in system of particles |
|
Answer» My favourite chapter is system of particles. Sure i \'ll help u. ??? but he is not ready to get help ? My favourite chapter is work power energy and gravitatio. Yes i am ready to help Gravitation.....and oscillation Thanka my fav chap is laws of motion nd work nd energy... yup I ready to help you. ✌️ ☺️ |
|
| 9694. |
Dimension of current |
|
Answer» Hello Hi aman Ampere(A)?? |
|
| 9695. |
Carnot engine is in syllabus |
| Answer» Yes it is there | |
| 9696. |
Y(x,t)=r sin (Wt-kx+ø° |
|
Answer» What\'s your question?? What is this Ye kya hai.. |
|
| 9697. |
What are the types of flows? Explain them..(MECHANICAL PROPERTIES OF FLUIDS) |
| Answer» Turbulent flow:- When the velocity of liquid becomes greater than the critical velocity, the particles follow zig-zag path, such a disordered is called turbulent flow. Laminar flow:- The flow in which liquid moves in the form of layers. Streamline flow:- It is an orderly flow of fluid in which all the molecules of the fluid passing through a certain point have same velocity. | |
| 9698. |
Gravitational field on surface of solid sphere |
| Answer» | |
| 9699. |
Write some example of capilarity from daily life |
|
Answer» Straw ? in liquidsFountain ? pensIn biological experiments example are 1) Sponges and brushes used to absorb soap water to clean the vessels2)Tearing of eyes Example :- water moving up a straw or glass tube, moving through a paper or cloth towel, moving through a plant. |
|
| 9700. |
something about carnot engine |
| Answer» | |