Ask questions which are clear, concise and easy to understand.

Please Wait.. Editor is Loading..
Yakkshi ???? Do you receive my message below
  • 1 answers

Yakshi 😛 an hour ago

Yes......😉😉😉's okk was my fault to interfere in ur matters.......
  • 1 answers

A S 14 hours ago

All the chapter of physics important derivarions which has been frequently asked in 11 final voard exam.
  • 3 answers

Geetisha Khinchi 21 hours ago

Avneet ... Are these important questions or derivations?!
Hope it helps you 😅
Units and dimensions - parallax method motion in a straight line - derivation of kinematic equations by graphical and calculus method. motion in a plane - vector addition, equation of path of projectile including max height, horizontal range and time of flight, uniform circular motion-expression of centripetal acceleration. laws of motion-derivation of first and third law from second law, impulse-momentum theorem, conservation of momentum, relation between angle of friction and angle of repose with resultant acceleration and contact force, motion of a car in leveled road and banked road, bending of cyclist on level road. work, energy and power - expression for KE by calculus method, work-energy theorem for a constant and variable force, motion in vertical circle, PE of a spring, one dimension collision(elastic and inelastic), two dimension collision(elastic and inelastic). system of particles and rotational motion - relations between rotational and linear motion, relation between torque and angular momentum and moment of inertia, mechanical advantages, conservation of angular momentum, rolling motion(energy, velocity, acceleration and time). gravitation - kepler’s laws, relation between g & G, g value above and below the surface of the earth, escape velocity and orbit velocity. mechanical properties of solids - relation between young’s modulus, bulk modulus, shear modulus and poisson’s ratio. mechanical properties of fluids-variation of pressure and depth, Archimedes principle, equation of continuity, bernoulli’s theorem, speed of efflux, venturimeter, terminal velocity, drops & bubbles. thermal properties of matter - linear, areal, volume expansion, thermal stress, newtons law of cooling. thermodynamics - Cp - Cv = R, work done in isothermal, adiabatic process, carnot engine. kinetic theory - law of equipartition of energy, degree of freedom. oscillations - SHM(displacement,velocity,acceleration,amplitude and intensity), spring combinations, time period of simple pendulum, energy in SHM. waves - doppler effect.
Difference between first law nd second law of Newtown ??
  • 8 answers
Kya bhai joking kar rha tha tu
Yes its newton
Yakshi ab bura mat mañana I am just kidding 😋😋
Yakshi its Newton

Yakshi 😛 19 hours ago

Aapki Newton ki spelling wrong h.....😌
1st law -when all forces that are at work on a object are balanced that obj will remain in that state forever . If it is moving ,it will remain moving at the same speed and in same direction . Also known as law of inertia . 2nd law-It state that acceleration of an obj is dependent upon two variables , the net force acting upon the obj and the mass of the object .
What is Reynolds no. ????
  • 2 answers
a dimensionless number used in fluid mechanics to indicate whether fluid flow past a body or in a duct is steady or turbulent.
The Reynolds number (Re) is an important dimensionless quantity in fluid mechanics used to help predict flow patterns in different fluid flow situations. At low Reynolds numbers, flows tend to be dominated by laminar (sheet-like) flow, while at high Reynolds numbers turbulence results from differences in the fluid's speed and direction, which may sometimes intersect or even move counter to the overall direction of the flow (eddy currents).
What is differwnce between slope and gradient
  • 2 answers
A gradient is a vector, and slope is a scalar. Gradients really become meaningful in multivarible functions, where the gradient is a vector of partial derivatives. With single variable functions, the gradient is a one dimensional vector with the slope as its single coordinate (so, not very different to the slope at all).

Yakshi 😛 1 day ago

The degree of inclination or the rate of ascent and descent is gradient while slope is often used to describe the measurement of the steepness,gradient, incline or grade of a straight line
All important derivation of physics...
  • 3 answers
All chapters
Which chapter ????

Yakshi 😛 1 day ago

I can tell u but from which chapter????
Difference between real image and virtual image
  • 1 answers

Yakshi 😛 23 hours ago

REAL IMAGE:- 1)light rays actually meet to form a real image. 2) is generally inverted 3)can be obtained on a screen 4) this image is in front of mirror and behind the lens 5) we can reach on it Example....cinema screen............VIRTUAL IMAGE:- 1)light do not actually meet to form virtual image 2) is erect 3) image cannot be obtained on the screen 4)behind the mirror and in front of lens 5) we cannot reach to it Example....our image in plane mirror......hope it will help u😅
What is banking of road and what is the significance of banking?
  • 1 answers

Ruru ❤️ 1 day, 2 hours ago

Banking of road increasing the height of road from one side its significance is that it RESUCES friction eg.. on CAR TRACKS
A body is thrown up with an initial velocity u and covers a maximum height of h , then the h is equal to....
  • 1 answers
Here, initial velocity = u           final velocity = 0 (at max. height, velocity is 0)           height covered = h            acceleration due to gravity = g  Using the law of kinematics : v² - u² = 2as we get -u² = -2gh (considering upward direction as positive, "g" is always                                              downward)  Thus, we get h = u²/2g
A body of mass 50 kg has a volume of 0.049 m3 . The buoyant force on it is?
  • 5 answers
Since the net upward force must be equal to the net downward force. So, buoyant force = mg=50x9.8=49kgf
Can you see the answer again. Is it 49kg f?

Saba Elias 😊😋🤗 1 day, 3 hours ago

Sorry sis but in the book it is given the option with the answer 49N is right but there is no solution here
Mass of body = 50kg volume = 0.049 m^3 Since the density of body is more than density of water, it will sink. When it sinks, it will displace equal volume of water. So volume of water displaced = 0.049 m^3 mass of water = density × volume = 1000×0.049 = 49kg buoyancy = weight of water displaced => buoyancy= mg => buoyancy= 49×10 = 490N Hence, buoyant force is 490N
The buoyant force is 490 N.
Explain why mud house are cooler in summer and warmer in winter?
  • 1 answers

Yogita Ingle 23 hours ago

Mud houses have thatched roofs.The insulating effect of the thatch prevents heat getting in very quickly (cool in summer) and heat getting out very quickly (warm in winter).
Secondly, mud houses are made up of mud, which has large pores. So the evaporation is more in mud houses. As evaporation causes cooling, mud houses feel cooler in summers.


Which is more elastic steel and rubber?give reason?
  • 2 answers
Answer- steel Reson- By the definition, steel is more elastic than rubber because steel comes back to its original shape faster than rubber when the deforming forces are removed. Elasticity In Physics And In Common Life: In common life we label a substance as more elastic if it can be stretched more than others

Aaditya Rathore 1 day, 4 hours ago

Relation between acceleration due to gravity and gravitational constant
  • 2 answers
The acceleration due to gravity depends on the mass of the body, the distance from the center of mass, and a constant G, which is called the "universal gravitational constant". Its value is = 6.673 x 10-11 N. m2/kg2. g=GM/ r^2

Christin Mathew 1 day, 5 hours ago

Acceleration due to gravity is 9.8 m/s2.
why the speed of stationary wave is zero?
  • 1 answers
as the wave is "standing", so the wave velocity should be 0. ... In the other hand, the energy transmitting along a standing wave is zero if we treat the standing wave as two traveling waves at opposite directions! Then it applies that the velocity of standing wave is zero.
  • 8 answers

Himanshu Shekhar 1 day, 1 hour ago

Omg its God's particle!!

Ishita Ishita 1 day, 4 hours ago

Friends shayad usko ni pta hoga.....hum bata dete hai na...arrey iska answer 2 hai....vaise mujhe lagta hai aapne wrong class enter kar li hai...plz look for that...😨😨😨😨

Saba Elias 😊😋🤗 1 day, 4 hours ago

Itna hard question to exam me v nhi puchte h🤣🤣🤣🤣🤣🤣🤣

Yakshi 😛 1 day, 6 hours ago

My god!!!!!!......😨😱mujhey b nai aata.....itna hard question agar exam mein aaya toh hum toh fail e ho jaayenge......😂😂😂
Non sence 😂😂😂😂😂

Aditi Mittal 1 day, 12 hours ago

Nonsense..... 😂😂😂😆😆😆

Avneet ❤️❤️ 1 day, 13 hours ago

Well I don't know .....🤣🤣🤣🤣🤣 Toughest question of the day 🙏🙏🤔🤔🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣
haaa bolo nancy or priya
  • 2 answers

Aaditya Rathore 1 day, 18 hours ago

Don't upload name of any girl understand

Nancy Rajput 1 day, 19 hours ago

don't upload my name if you want help then I help u
What is mechenical equivalent of heat ??
  • 5 answers
Your wellcome
And for you knowledge - The mechanical equivalent of heat was a concept that had an important part in the development and acceptance of the conservation of energy and the establishment of the science of thermodynamics in the 19th century.
Again thanks ayushi
In the history of science, the mechanical equivalent of heat states that motion and heat are mutually interchangeable and that in every case, a given amount of work would generate the same amount of heat, provided the work done is totally converted to heat energy.
What is carnot engine ? Explain please.. fast reply 😐😣😣😣😣😣😣
  • 8 answers
Thanks priya

Priya Dharshini ☺☺ 1 day, 8 hours ago

It is a reversible heat engine operating between two temperatures. It has a maximum efficiency which no other engine can have.
According to second law of thermodynamics, no heat engine can have 100% efficiency Carnots heat engine is an idealized heat engine that has maximum possible efficiency consistent with the second law. Cycle through which working substance passed in Carnots engine is known as Carnots Cycle. Carnot's engine works between two temperatures T1 - temperature of hot reservoir T2 - temperature of cold reservoir In a Complete Carnot's Cycle system is taken from temperature T1 to T2 and then back from temerature T2 to T1. We have taken ideal gas as the working substance of cornot engine.

Gaurav Seth 1 day, 20 hours ago

Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It gives the estimate of the maximum possible efficiency that a heat engine during the conversion process of heat into work and conversely, working between two reservoirs, can possess. 

Hi arun

Arun Venkateshwaran 1 day, 20 hours ago

Hi friends I'm new to this so plz explain about this app😇😊
Please reply anyone
Hey anyone there......i hav a question....
  • 7 answers
What is your question .........

Prefer To Be Anonymous👻 1 day, 9 hours ago ques. Is....

Yakshi 😛 1 day, 20 hours ago

Shoot it!

Priya Dharshini ☺☺ 1 day, 21 hours ago

Which question ?
Yes tell

Nancy Rajput 1 day, 22 hours ago

yes tell
A stone is dropped from a height of 45m. What will be the distance travelled by it during the last second of its motion?(g=10m/s2)
  • 8 answers

Nancy Rajput 1 day, 21 hours ago

ok sis

Nancy Rajput 1 day, 21 hours ago

its half gravutatuon force and the in last second it shouls be 2n-1

Saba Elias 😊😋🤗 1 day, 21 hours ago

Thnx 2 botg
total time taken=(2h/g)1/2 = (2*45/10) ½ = (9) ½ = 3 distance travelled in last sec = S= u + a/2 (2n-1) S= 0 + 10/2 (2*3 – 1) = 25 m

Nancy Rajput 1 day, 21 hours ago

total time taken=(2h/g)1/2 = (2*45/10) ½ = (9) ½ = 3 =>for last second of its motion .... =>distance travelled in last sec = S= v0+ a/2 (2n-1) S= 0 + 10/2 (2*3 – 1) =0+5(6-1) =0+5(5) = 25 m

Saba Elias 😊😋🤗 1 day, 22 hours ago

Ayushi plz give me the full solution
Answer - 25m distance

CBSE Study App

  • Install myCBSEguide mobile app for FREE sample papers, Test Papers, Revision Notes, Previous year question papers, NCERT solutions and MCQ tests
  • Refer myCBSEguide App to your friends and Earn upto Rs.500/-.

myCBSEguide App

Create Question Papers

  • We have 3,00,000+ questions to choose from.
  • You can print these questions papers with your own Name and Logo.

This product is best fit for schools, coaching institutes, tutors, teachers and parents who wish to create most relevant question papers as per CBSE syllabus for their students to practice and excel in exams. Creating question papers online with your own name and logo takes less than 2 minutes. Just follow few steps, customise header and footer and download the question paper in PDF format. 

Download eBooks as PDF

  • Select eBook
  • Pay online
  • Download as PDF

Download CBSE sample papers, test papers and worksheets as PDF. Buy chapter wise online MCQ tests for day to day practice.

Work from Home

  • Work from home with us
  • Create questions or review them from home

No software required, no contract to sign. Simply apply as teacher, take eligibility test and start working with us. Required desktop or laptop with internet connection