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

Wavelength dimension=[L] mass dimension=[M] velocity dimension= [LT^-1] plank constant dimension=[ML^2T^-1] now [L]=k [M]^a [LT^-1] ^b [ML^2T^-1] ^c =k [M]^(a+c)[L]^(b+2c)[T]^(-b-c) compare LHS to RHS a+c=0 b+2c=1 -b-c=0 so c=1 b=-1 a=-1 hence lemda=k .plank constant/(mass. velocity) =h/mv

3Thank You

ANSWER

What is tye origin of forces between two surfaces in contact

Posted by Amisha Arora 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Best reference book of physics in class 11th

Posted by Akash Choudhary Dav Gandhinagar 7 years, 6 months ago

CBSE > Class 11 > Physics

4 answers

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 6 months ago

NCERT is best your paper will come from ncert even numericals but for practice you can take SL Arora

2Thank You

Aditi Bhati 7 years, 6 months ago

Abc

0Thank You

Aditi Bhati 7 years, 6 months ago

Pradeep

1Thank You

Shivani Jha? 7 years, 6 months ago

S.l arora

2Thank You

ANSWER

A drunk yard

Posted by Mohd Haris 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

If s=ut + at2, where, s = displacement, u = speed and a = acceleration and t = time. Check of the given expression dimensionally correct or not?

Posted by Alyen Sharma 7 years, 6 months ago

CBSE > Class 11 > Physics

3 answers

Alyen Sharma 7 years, 6 months ago

I know better than u Gulzar naqvi

1Thank You

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 6 months ago

This expression is dimensionally correct as its obeys principle of homogeneity.....but in real this expression is not correct

1Thank You

Pratyush Kumar Shrivastava 7 years, 6 months ago

Not correct since S = ut + 1/2at^2

2Thank You

ANSWER

A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between h1, h2 and h3 is:

Posted by Nancy Rajput 7 years, 6 months ago

CBSE > Class 11 > Physics

4 answers

Dream Girl 7 years, 6 months ago

Hi rounak

0Thank You

Rounak Singh Rajputana 7 years, 6 months ago

Tum 10 wali ho na

0Thank You

Rounak Singh Rajputana 7 years, 6 months ago

Hiii nancy

1Thank You

Rishant Kumar 7 years, 6 months ago

h1=h2=h3

1Thank You

ANSWER

Two masses in the ratio 1:2 are thrown vertically up with the same speed. What is the effect on the time by the mass?

Posted by Uma Vohra 7 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Rishant Kumar 7 years, 6 months ago

No effect

1Thank You

ANSWER

5. If x = a+bt+ct2 , where x is in metres and t is in second, what is the dimensional formula of c?

Posted by Uma Vohra 7 years, 6 months ago

CBSE > Class 11 > Physics

4 answers

Gautam Gariya 7 years, 6 months ago

LT^-2

0Thank You

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 6 months ago

Sorry metre second^-2

0Thank You

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 6 months ago

Metre.second^-1

0Thank You

Rishant Kumar 7 years, 6 months ago

T-2

0Thank You

ANSWER

Discuss the relation between physics and other branch of science

Posted by Jahnvee Dahre 7 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Shreya Singh 7 years, 6 months ago

Physics is also called 'the fundamental science' because the subject of study of all branches of natural science like chemistry, astronomy,geology and biology r constrained by laws of physics.

3Thank You

ANSWER

What's physics

Posted by Pulkit Verma 7 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Shreya Singh 7 years, 6 months ago

Physics is the natural science that studies matter and its motion and behaviour through space and time and that studies the related entities of energy and force.

1Thank You

ANSWER

differentiation of "y=tan root x"

Posted by Ojashwini Sharma 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

differentiation of "R=e^sin p"

Posted by Ojashwini Sharma 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

How to write dimensional formula

Posted by Ranjani Venthan 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Relation between parsec and astronomical unit

Posted by Abcdefghijklmnopqrstuvwxyz Shekhawat 7 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 6 months ago

The AU or astronomical unit is the shortest distance of the three. It is the rough distance from the sun to the earth . The AU is used strictly to measure distances in our solar system. A parsec is a very complex idea. Basically it is used to measure the distances between any two objects beyond our solar system. It is complex because it takes into account the movement of the earth relative to those other two objects to better define the desired result.

3Thank You

ANSWER

The distance x of a particle moving in one dimension under the action of a constant force is related to time t by the equation x = √t + 3 where x is in metre and t is in seconds find the displacement of the particle when velocity is zero

Posted by Manish And Shivani Sharma 7 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 6 months ago

I think there is some mistake... As v=dx/dt ,v=d√t+3/dt ,v=1/(2√t)+0 And when v is zero ,t=1/0 ,t is infinite .......

0Thank You

ANSWER

Hiiiiii dream girl

Posted by Rounak Singh Rajputana 7 years, 6 months ago

CBSE > Class 11 > Physics

3 answers

Riddhi Khandalwal 7 years, 6 months ago

Hi ravi Tum kon??

0Thank You

Rounak Singh Rajputana 7 years, 6 months ago

Haa

0Thank You

S Mandal 7 years, 6 months ago

Hello ravi

1Thank You

ANSWER

How can we derive Newtown's first and third law with the help of the Newtown's second law?

Posted by Manik Ranjan 7 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Manik Ranjan 7 years, 6 months ago

Newton's 1st law from 2nd law- According to newton's 2nd law F=ma If no force is applied F=0 ma=0 Since m is not equal to 0 Therefore a=0 V-U÷t=0 V-U=0 V=U It means the body in the state of rest remains in state of rest and if the body is in uniform motion remains in uniform motion when applied force is zero. Hence the 1st law is verified. Newton's 3rd law from 2nd law - Suppose, two bodies having momentum P1 and P2 collide with each other. Hence from the "law of conservation of momentum " we know that- P1+P2=K (constant) Differentiating this equation with respect to 't'(time)- dP1÷dt + dP2÷dt = dK÷dt dP1÷dt + dP2÷dt = 0 ( since differentiation of constant term is 0) dP1÷dt = dP2÷dt F1 = -F2 (F is force) Hence, the 3rd law is verified. -by Manik Ranjan

1Thank You

ANSWER

what can i do if my coarse is left behind

Posted by Sam Shukla 7 years, 6 months ago

CBSE > Class 11 > Physics

3 answers

Dream Girl 7 years, 6 months ago

S mandal I don't remember u

0Thank You

S Mandal 7 years, 6 months ago

Try to follow either the school or the tution or the coaching. If you ate left behind then dont try to pull all of them together. Keep patience and my trick will work but you need a really hard work......

1Thank You

Sam Shukla 7 years, 6 months ago

plzz help me in this

0Thank You

ANSWER

The radii of the two parts of the Venturimetre are 20 cm and 10 cm respectively . when the venturimetre is connected to a water pipe , the levels of the water in the manometre tubes differ by 10cm. Find the rate of flow of water through the pipe.

Posted by Bibhuti Singha 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A partical start rotating fron rest according to formula thita =3tcube divide by 20 -tsquaredivide by 3 where thita in t is in seconds find out the angular velocity omega an accelaration alpha at end of 5 sec

Posted by Kajal Sen 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Dimensions of motion equations.

Posted by Gayathri Balaji 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is actually the definition of dimensions?

Posted by Dee Pika 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A car is moving alongstraught line with speed 72jm/hr is brought to stopwuth in the distance of 100m what is refarshan if car. How long does it take to stop the car

Posted by Komal Sandhu 7 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What are the main domance interest in physics

Posted by Jatin Patel 7 years, 6 months ago

CBSE > Class 11 > Physics

2 answers

Christin Mathew 7 years, 6 months ago

Macroscopic and microscopic

0Thank You

Shreya Singh 7 years, 6 months ago

I think it's dominance

2Thank You

ANSWER

Plz explane polygon law with the help of triangle law

Posted by Priya Yadav 7 years, 6 months ago

CBSE > Class 11 > Physics

2 answers

Shreya Singh 7 years, 6 months ago

Consider vectors A,B,C,D and E. To find the resultant of these vectors,draw a vector ab=A,bc=B,cd=C,de=D,ef=E and af=R. Proof- join ac and apply triangle law of vector addition to ∆abc ac=ab+bc = A+B. Now join ad and apply triangle law of vector addition to ∆acd ad=ac+cd = A+B+C. Now join ae and apply triangle law of vector addition to ∆ade ae=ad+de = A+B+C+D. Finally apply triangle law of vector addition to ∆aef af=ae+ef = A+B+C+D+E. Therefore, R = A+B+C+D+E.

2Thank You

Shreya Singh 7 years, 6 months ago

Diagram is required for it but,I can't give u diagram but surely I can give u the solution.

2Thank You

ANSWER

Tell rounak

Posted by Dream Girl 5 years, 8 months ago

CBSE > Class 11 > Physics