CBSE > Class 11 > Physics | CBSE Board | Homework Help

Impulse is defined as a force multiplied by time it acts over. For example: Tennis racket strikes a ball, an impulse is applied to the ball. The racket puts a force on the ball for a short time period.

1Thank You

ANSWER

Relation between acceleration displacement and frequency of a particle executing in SHM

Posted by Abhinay Srivastava 5 years ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Energy of satellite

Posted by Hira Lala 5 years ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Pressure of ges

Posted by Swarup Swapnil 5 years ago

CBSE > Class 11 > Physics

2 answers

Manjeet Sahu 5 years ago

Where p is pressure, n is no. Of moles of gases, R is universal gas constant, T is temperature and V is Volume

0Thank You

Manjeet Sahu 5 years ago

P=nRT/V

1Thank You

ANSWER

Q26) an object is travelling with an initial velocity u and is uniformly accelerated by 'a' attains a final velocity 'v'. plot a velocity time graph for this motion of the body and prove that area under the velocity time graph is numerically equal to displacement.

Posted by Pearl ? 5 years ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Scalar product and its properties

Posted by Priyanshu Prajapati 5 years ago

CBSE > Class 11 > Physics

1 answers

Account Deleted 5 years ago

It shows Magnitude and unit is called scalar quantity.

4Thank You

ANSWER

Show that for small osullations motion of a pendulum is in S.H.M

Posted by Riya Shah 5 years ago

CBSE > Class 11 > Physics

1 answers

Abhinav Chauhan 5 years ago

A pendulum moves in such a way that angle is formed by it is θ , as you know , along tangent , motion of pendulum is just opposite to force. As shown in figure. Here what you see both the above conditions are satisfied when displacement of pendulum is small.

0Thank You

ANSWER

Two satellites are revolving round the earth at different heights. The ratio of their orbital speeds is 2:1. If one of them is at a height of 100km, the height of the other satellite is (Radius of earth R=6400 km )

Posted by Vedika Sharma 5 years ago

CBSE > Class 11 > Physics

1 answers

Abhinav Chauhan 5 years ago

Orbital velocity is given by: V=R+hGM Where G is the Universal Gravitational constant, M is the mass of the Earth, h is the height of the satellite from the earth's surface and R is the radius of the earth. V∝R+h1 V2V1=R+h1R+h2 Given: V2V1=12, h1=100 km and R=6500 km ⇒12=6400+1006400+h2 ⇒6400+h2=4×6500=26000 km Hence, the height above the earth's surface, h2=26000−6400=19600 km

3Thank You

ANSWER

Using dimensional analysis derive a formula in which the time period of a spring depends on mass of the body and spring constant of the spring.

Posted by Annn Nnn 5 years ago

CBSE > Class 11 > Physics

2 answers

Kamlesh Verma 5 years ago

T=[M]^a[K]^b

0Thank You

Kamlesh Verma 5 years ago

T - time period , T = D[M^a][K^b] : D- some constant ,M- mass ,K- spring constant

2Thank You

ANSWER

3 law of motion

Posted by Sonu Kalyanpura 5 years ago

CBSE > Class 11 > Physics

2 answers

Swastik . P 5 years ago

1) when a object is in motion or rest it will always be in motion/rest untill external force is applied to it 2) Momentum varies directly with applied force w.r.t time 3) For every action there is opposite reaction

0Thank You

Lakshay Dhall 5 years ago

Every action there is an equal and opposite reaction

0Thank You

ANSWER

Define type of product in vector

Posted by Pratika Parmar 5 years ago

CBSE > Class 11 > Physics

1 answers

Sanika Komawar 5 years ago

There are 2 types of products in vector 1) dot product- A.B 2)Cross product- A×B....

1Thank You

ANSWER

2 mass 100kg and 1000kg place 1meter away . Due to both where the value of gravitational accelaration will be zero

Posted by Deeksha Deora 5 years ago

CBSE > Class 11 > Physics

1 answers

Abhinav Chauhan 5 years ago

https://www.topperlearning.com/doubts-solutions/there-are-two-bodies-of-mass-100kg-and-10000kg-separated-by-a-distance-1mat-what-distance-from-the-smaller-body-is-the-intensity-of-gravitational-fiel-orth0o

0Thank You

ANSWER

What do you mean by torque

Posted by Priti Yadav 5 years ago

CBSE > Class 11 > Physics

3 answers

Bharti Chaudhary 5 years ago

The vector product of force and distance from axis of rotation for centre of mass

0Thank You

Lakshay Dhall 5 years ago

Angular force is known as torque

1Thank You

Cutiee Sujii 5 years ago

It is a rotational analogue of force, also commonly known as moment of force.

3Thank You

ANSWER

Parallax method....?

Posted by Anushika Dubey 5 years ago

CBSE > Class 11 > Physics

1 answers

Abhishek Gupta 5 years ago

Parallax is the displacement or the change in the apparent position of the object when viewed from two different points of view. The two points of view have their own line of sights and parallax is measured as half of the angle between the two lines of sights. When you are traveling in a vehicle and you look around as you are moving, you will see that objects in the distances appear to move more slowly than the objects closer to you. This is the effect of parallax. Nearby objects have a larger parallax than the distant objects, so the parallax can be used to determine distances. The phenomenon of parallax, when combined with triangulation, will yield the location of the object with considerable accuracy. Astronomers regularly use the parallax method to measure the distances of the closer stars. Distance Measurement by Parallax Distance measurement by parallax is a special application of the principle of triangulation. From triangulation, we knew that a triangle can be described completely if two angles and sides are known. In the image shown above, the distance of a distant star is being calculated. The star being closer to earth than the far away starts exhibits a finite parallax value. This way, we can obtain the value of the parallax angle by viewing the star from two known points on Earth forming the baseline of the triangle. Let’s define the parallax half-angle from two distinct points on Earth as ‘p’. Here the maximum value of‘ ‘d’ is the radius of Earth and the distance of the star can be assumed to be only slightly farther than the sun. Here the value of the distance from the sun is many magnitudes smaller than the radius of the earth due to which the value of the parallax angle we get is extremely small. Too small to be even detected. This is the fact behind, why the great Astronomer Cassini and his colleagues were unsuccessful in finding the parallax for even a single star. This was considered by his detractors to be proof that heliocentricity was wrong. Cassini’s theory was correct but the least count of the equipment used then wasn’t small enough. Application Assuming the angle ‘p’ is small, the distance to the object measured in parsecs (in terms of speed of light) is equal to the reciprocal of the parallax angle measured in arcseconds. D(parsec)=1p(arcsec) In order to overcome the problem of the small ratios, star parallax is most often measured using annual parallax which is defined as the difference in the position of a star as seen from the earth and sun. Instead of taking the fixed baseline as the Earth’s radius, the fixed baseline is taken as the radius of Earth’s revolution around Earth which increases the size of the baseline therefore the top angle making it easier to measure. Measurement of stellar distances and the parallax angle in terms of distancesUnfortunately, the ground-based telescopes can only measure parallax reliably for stars that are within a few hundred light-years from us. Telescopes above the atmosphere such as the Hubble Telescope can measure smaller parallax shifts and thus larger distance, but even in that case the most distant objects for which distance can be determined by parallax of a few thousand light-years away. To measure further distances, we use other methods which you will learn in the coming classes.

3Thank You

ANSWER

Define random error

Posted by Praveen Khavatkop 5 years ago

CBSE > Class 11 > Physics

2 answers

Rrrrr Rrrrr 5 years ago

statistical error that is wholly due to chance and does not recur —opposed to systematic error.

0Thank You

Praveen Khavatkop 5 years ago

The random error are those error, which occur irregularly and hence are random with respect to sign and size

1Thank You

ANSWER

Anyone have idea that in physics which book has more weightage ? ..PART-1 OR PART-2 ? Means maximum questions will come from which part ?

Posted by Shreeya ? 5 years ago

CBSE > Class 11 > Physics

5 answers

Aditya Chauhan 5 years ago

Part 2 and part 1 ke kuch ch

1Thank You

Uday Choudhary 5 years ago

Part 2

2Thank You

Abhishek Bharati 5 years ago

From part 1 .. Total 40 marks will come from first book

1Thank You

Priti Yadav 5 years ago

Have 30 marks weightage

5Thank You

Priti Yadav 5 years ago

Part 2

2Thank You

ANSWER

Hey I'm having my physics exam day after tomorrow and yet I've done nothing ( I know it's my fault ?, but what to do ) any suggestions ? to how can I prepare for my physics exam ?

Posted by Shreeya ? 5 years ago

CBSE > Class 11 > Physics

2 answers

Nikki Singhal 5 years ago

Keep this phone aside and put your whole focus on allthe formaulas and derivations If you even don't practice for numericals but make 100%sure that you can write all the theory well than you can score above 70 from 100 dear

5Thank You

Shreeya ? 5 years ago

Ok thanks I'll see ...well all the best to you ?

4Thank You

ANSWER

a lift is accelerated upward. will the apparent wait of a person inside the lift increase, decrease or remain the same relative to its real weight ?what will happen to the apparent weight if the lift moves with uniform speed?

Posted by Harleen Grewal 5 years ago

CBSE > Class 11 > Physics

2 answers

Karan Sharma 5 years ago

Weight increase hoga

0Thank You

Shivang Choudhary 5 years ago

Weight will increase

0Thank You

ANSWER

What is the function of physics?

Posted by Pearl ? 5 years ago

CBSE > Class 11 > Physics

1 answers

Manjeet Sahu 5 years ago

???????

0Thank You

ANSWER

Friends kl mera exam h physics ??

Posted by Harsh Pandit 5 years ago

CBSE > Class 11 > Physics

3 answers

Manjeet Sahu 5 years ago

Koi chandigarh se h kya???

0Thank You

Shreeya ? 5 years ago

Harsh kaisa gya.? ...mera Wednesday ko hai !!

0Thank You

Shreeya ? 5 years ago

Harsh all the best mera English ka hai ✌️

3Thank You

ANSWER

proof I=mr2

Posted by Kratika Patidar 5 years ago

CBSE > Class 11 > Physics

1 answers

Harsh Pandit 5 years ago

Sorry g

4Thank You

ANSWER

Explain projectile motion

Posted by Alka Singh 5 years ago

CBSE > Class 11 > Physics

4 answers

Raunak Chauhan 5 years ago

When an object projected with some angle from the ground and allow to move under the influence of gravity ,then the motion possess by the object is called projectile motion

0Thank You

Harsh Pandit 5 years ago

When a body projected on a parabolic path then the motion of the body is parabolic ???

1Thank You

Kratika Patidar 5 years ago

Motion where an object moves in parabolic path, the object is called projectile and its motion is called projectile motion.

0Thank You

Priyanshu Basu 5 years ago

IF an object is thrown with some initial velocity and which is then allowed to move under the action of gravity is known as ?????????? ??????.

0Thank You

ANSWER