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Inertia??

Posted by Aadya Singh 5 years, 1 month ago

CBSE > Class 11 > Physics

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Moment of inertia of solid sphere... ✍✍✍✍

Posted by ?????? ?? 5 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Pk ⚔️ 5 years, 1 month ago

Hello bhai....kaise ho?? Pahchana?...padhai kaise chal rahi??.....ghar me sab badhiya?

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Yogita Ingle 5 years, 1 month ago

Moment of inertia of sphere is normally expressed as;

I = ⅖ MR²

Here, r and m are the radius and mass of the sphere respectively. Students have to keep in mind that we are talking about the moment of inertia of a solid sphere about its central axis above. Additionally, if we talk about the moment of inertia of the sphere about its axis on the surface it is expressed as;

I = 7/5 MR²

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Three forces 3 Newton 5 Newton and 4 newton act simultaneously on a particle along east west and South respectively calculate the magnitude and direction of the resultant force

Posted by Devanshi Jain 5 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Dεερακ Ȿιηɠꜧ 5 years, 1 month ago

Resulting force : 2N along west, 4N along south
Total force = √(2²+4²) = √20 = 2√5N along south west

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Yogita Ingle 5 years, 1 month ago

The magnitude of three forces 3N,4N and 5N will be zero, if these vectors from a close polygon will all the sides in the same order as shown in figure. Hence,the acceleration of body may be zero

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Can a single nucleus emit alpha,beta and gamma ray together

Posted by Priya Negi 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 1 month ago

No, the radioactive nucleus does not emit alpha and beta radiations simultaneously. Some nucleus emit alpha particles, others beta particles and changes into a new nucleus and to balance the energy, gamma radiations are emitted.

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Tomorrow is my physics test of Chptr 1 & 2 of Unit 5... Plz tell some important articles what I have to do.. +1 Non-medical PHYSICS PART-2... PLZ TELL

Posted by Sadul Sharma 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sadul Sharma 5 years, 1 month ago

Motion of system of particles and rigid body (unit name -5) Chptr names_centre of mass(ch-1)......... Rotational motion (ch-2)

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Prove g m1m2/r2

Posted by Palak Sharma 5 years, 1 month ago

CBSE > Class 11 > Physics

0 answers

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the density of mercury is 13.6 g/cm3. convert this to kg/m3

Posted by Himanshu Sharma 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 1 month ago

SI unit of density is Kg/m³
1 m = 100 cm => 1 cm = 10-² m
1 Kg = 1000g => 1g = 10-³ Kg

now,
13.6 g/cm³ = 13.6 × ( 10-³)/(10-²)³ Kg/m³

= 13.6 × 10-³/10^-6 Kg/m³

= 13.6 × 10^(-3 + 6) Kg/m³

= 13.6 × 10³ Kg/m³

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Expression for energy stored in string

Posted by Pooja Kirola 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 5 years, 1 month ago

Hooke’s Law, F = -kx, where F is the force and x is the elongation.
The work done = energy stored in stretched string = F.dx
The energy stored can be found from integrating by substituting for force,
and we find,
The energy stored = kx²/2, where x is the final elongation.
The energy density = energy/volume
= (kx²/2)/(AL)
=1/2(kx/A)(x/L)
= 1/2(F/A)(x/L)
= 1/2(stress)(strain)

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Convert into 100 Dyne Newton

Posted by Himanshu Sharma 5 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Abirami Kamalbabu 5 years, 1 month ago

1N = 10^5 dyne 100 dyne = 10^2 dyne 10^2 / 10^5 = 10^-3 N So 100 dyne = 10^-3 N

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Aman Dahiya 5 years, 1 month ago

100 dyne = 100 gcms-² 1000g=1kg 100cm=1m 100 dyne = 100×1/1000×100 N = 0.001 N

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Convert 100 into Newton

Posted by Himanshu Sharma 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Aman Dahiya 5 years, 1 month ago

1 N = 1 kg ms-² = 1000 g ×100 m ×1 s-²= 100000 gcms-² =100000 dyne 100 N = 100 ×100000 dyne = 10000000 dyne

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Calculate the angle 1min in radian

Posted by Shivraj Bhartiya 5 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Dεερακ Ȿιηɠꜧ 5 years, 1 month ago

π/60×180 = π/ 10800

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Yogita Ingle 5 years, 1 month ago

We know that,

360° = 2π radians

Hence, 1° = 2 π/ 360 → (1)

10° = [2 π/ 360° ] x 10 = π/ 18 radians

60 minutes = 1°

Substituting (1),

60 minutes = 2 π/ 360

One minute = 2 π/ (360 x 60)

One minute = π/ 10800 radians → (2)

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Any bes time table for studying

Posted by Chaithra. H Chaithra. H 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Class 12 5 years, 1 month ago

Every timetable is best timetable, Its up to you that ,are u gonna follow it up in a best way... Thats all what i can say

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How to study physics yrr?

Posted by ⠀ 5 years, 1 month ago

CBSE > Class 11 > Physics

3 answers

Har Har Mahadev 🙏 5 years, 1 month ago

Practice numericals, learn concept .

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Pk ⚔️ 5 years, 1 month ago

Ham sab yek hi kasti me sawar hai???

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⠀ 5 years, 1 month ago

Physicsafter 10 has become so dimag ghumau. In theory its ok , but in numericals it creates a problem

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Convert into 10 joule to into erg

Posted by Himanshu Sharma 5 years, 1 month ago

CBSE > Class 11 > Physics

2 answers

Dεερακ Ȿιηɠꜧ 5 years, 1 month ago

1J= 10⁷erg
10J = 10×10⁷ erg = 10⁸erg

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Yogita Ingle 5 years, 1 month ago

we know, 1 Joule = 1 Kg m²/s²
1 erg = 1 g cm²/s²
so, 1 Joule = 1Kg m²/s²
= {1000 g} {100cm}²/s². [ 1kg = 1000g and 1m = 100cm]
= 1000 × 10000 g cm²/s²
= 10000000 erg
hence, 1 Joule = 10⁷ erg
so, 10 Joule = 10 × 10⁷ erg = 10⁸ erg

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Posted by Pranshi Dwivedi 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Yash Rawat 5 years, 1 month ago

True, But not always, because magnitude of any vector or vectors taken separately is always greater than that of which are taken together, But this idea becomes wrong when vectors which are taken together have same sign because in this case there is effective addition of magnitude of both vectors and then there result is equal to that which are taken seperately.

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What is principal of superposition??

Posted by Pk ⚔️ 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 5 years, 1 month ago

Considering two waves, travelling simultaneously along the same stretched string in opposite directions as shown in the figure above. We can see images of <a href="https://byjus.com/physics/wave-theory-of-light/">waveforms</a> in the string at each instant of time. It is observed that the net displacement of any element of the string at a given time is the algebraic sum of the displacements due to each wave.

Let us say two waves are travelling alone and the displacements of any element of these two waves can be represented by y₁(x, t) and y₂(x, t). When these two waves overlap, the resultant displacement can be given as y(x,t).

Mathematically, y (x, t) = y₁(x, t) + y₂(x, t)

As per the principle of superposition, we can add the overlapped waves algebraically to produce a resultant wave. Let us say the wave functions of the moving waves are

y₁ = f1(x–vt),

y₂ = f2(x–vt)

y_n = f_n (x–vt)

then the wave function describing the disturbance in the medium can be described as

y = f₁(x – vt)+ f₂(x – vt)+ …+ f_n(x – vt)

or, y=∑ i=1 to n = fi (x−vt)

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For MCQ class-11 which book is right.

Posted by Aakash Kumar 5 years, 1 month ago

CBSE > Class 11 > Physics

4 answers

Divyanshu Barnwal 5 years, 1 month ago

NEET Champion for med. JEE Champion for non med.

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Divyanshu Barnwal 5 years, 1 month ago

JEE Champion

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Kya Kroge Naam Jaankar 5 years, 1 month ago

Dc pandey

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Kalki Kalki 5 years, 1 month ago

Arihant

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Mai need bataya tha na ki school opan ho gay

Posted by Annu Yadav 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Aakash Kumar 5 years, 1 month ago

School will be open after 1 month.

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What are significant figures

Posted by Adarsh Kaurav 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Sachi Chauhan 5 years, 1 month ago

Significant figures of a number written in positional notation are the digits that carry meaningful contribution in measurnments.it is used to get an accurate and precise answer

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Energy of projectile

Posted by Adarsh Kaurav 5 years, 1 month ago

CBSE > Class 11 > Physics

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.The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40 m s -1 can go without hitting the ceiling of the hall? 14. What is collision? Derive expressions for one dimensional collision. 15. Derive the expressions for the energy stored in spring? 16. Derive the expression for banking road? 17. Derive the expression for work energy theoram for constant force. 18. What is triangular law of vectors. 19. What is projectile motion? Derive the expression for maximum height? 20. Derive the expression for centrifugal force. 21.Derive the expressions for first second and third law of motion.

Posted by Tanushree Namdeo 5 years, 1 month ago

CBSE > Class 11 > Physics

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Check the correctness of physical equation s=ut+1/2at2 where u is the initial velocity v is the final velocity a is the acceleration s is the displacement and t is that time in which the the charge occurs

Posted by Chandrakala.S Chandu.S 5 years, 1 month ago

CBSE > Class 11 > Physics

1 answers

Parush Kumar 5 years, 1 month ago

s is displacement hear so the dimensions formula of s is [L] We know that we can add and subtract only those quantity which have same unit so dimensions formula of ut and 1/2at² is same Now u is initnial velocity it's dimensions formula is =[LT^-1] And t is time so =[T] ut dimensions formula is [L] The formula s=ut+1/2at² is dimensionally correct

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Itis given that A=Bsquare . If A=100+-plus Minus 0.20,then B equal to?

Posted by Aman Bahuguna 5 years, 1 month ago

CBSE > Class 11 > Physics