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Yogita Ingle 6 years, 11 months ago

<div>Coefficient of apparent expansion: It is the apparent increase in the volume of liquid per unit original volume per degree rise in temperature.</div>

Its SI unit is "per °C" or "°C^-1" or "K^-1".

ANSWER

What is angle of repose? How is it related to coefficient of maximum static friction?

Posted by Muazzama Ansari 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Sridevi Parimi 6 years, 11 months ago

The internal angle between the surface of the pile and the horizontal surface is known as the angle of repose and is related to the density, surface area and shapes of the particles, and the coefficient of friction of the material. Material with a low angle of repose forms flatter piles than material with a high angle of repose. The term has a related usage in mechanics, where it refers to the maximum angle at which an object can rest on an inclined plane without sliding down. This angle is equal to the arctangent of the coefficient of static friction μs between the surfaces.

ANSWER

What is par sec

Posted by Garry Singh Bhangu 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System. A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond, which corresponds to648000π astronomical units.
One parsec is defined as the distance at which an arc of length one astronomical unit subtends an angle of one second of an arc .

1 parsec = 3.08 x 10¹⁶m.

ANSWER

some important topics in chapter 11 12 nd 13...

Posted by Maunisha Mallan 6 years, 11 months ago

CBSE > Class 11 > Physics

4 answers

Maunisha Mallan 6 years, 11 months ago

thnx to all..

Ayushi Ayushi 6 years, 11 months ago

Chapter 13 – Kinetic Theory Important Topics: 1. Behaviour of Gases 2. Law of Equipartition Energy 3. Mean Free Path 4. Specific Heat capacity

Ayushi Ayushi 6 years, 11 months ago

Chapter 12 – Thermodynamics Important Topics: 1. Zeroth Law of Thermodynamics 2. First Law of Thermodynamics 3. Heat Engines 4. Second Law of Thermodynamics 5. Carnot Engine

Ayushi Ayushi 6 years, 11 months ago

Chapter 11 – Thermal Properties of Matter Important Topics: 1. Ideal Gas Equation 2. Thermal Expansion 3. Specific Heat Capacity 4. Calorimetry 5. Latent Heat 6. Heat Transfer 7. Newton’s Law of Cooling

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Last days of of this year is leaving us With all good & bad memories of this year Goodbye 2018 & Welcome to New Year 2019 Happy New Year To Friends.

Posted by ???. Pragati 6 years, 11 months ago

CBSE > Class 11 > Physics

3 answers

Priya Dharshini ? 6 years, 11 months ago

Happy new year to all. Whish u this year to bring u all happiness,joy,wealth,prosperity..... ya off course marks

Aman Kumar 6 years, 11 months ago

Happy new year to all

Ankit Singh 6 years, 11 months ago

Happy New year

ANSWER

Why are some insects able to walk on water?

Posted by Rohit Udasi 6 years, 11 months ago

CBSE > Class 11 > Physics

3 answers

Priya Dharshini ? 6 years, 11 months ago

Few spiders,bugs.... more than 1200 species can walk in water

Priya Dharshini ? 6 years, 11 months ago

The surface of any body of water behaves as though it is covered with an invisible skin, which allows small, light-weight insects to walk across it. This skin effect is caused by surface tension.

Aman Kumar 6 years, 11 months ago

Oooo...really for example??

ANSWER

What is an aerofoil?

Posted by Rohit Udasi 6 years, 11 months ago

CBSE > Class 11 > Physics

2 answers

Kavish Gaur 6 years, 11 months ago

More about aerofoil

Yogita Ingle 6 years, 11 months ago

An aerofoil (an aircraft wing) is shaped so that air flows faster along the top surface than the lower surface.

ANSWER

Displacement current

Posted by Dhiraj Sharma 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 6 years, 11 months ago

Answer: In electromagnetism, displacement current is a quantity that is defined in terms of the rate of change of electric displacement field. it is not an electric current of moving charges, but a time-varying electric field.

ANSWER

Unit wise distribution

Posted by Palak Bhinder 6 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Physics best youtube channal Tell me

Posted by Aakash Mi 6 years, 11 months ago

CBSE > Class 11 > Physics

2 answers

Ritu Thapliyal 6 years, 11 months ago

Yaa.. it's a good channel

Robin Rajput 6 years, 11 months ago

Physicswallah

ANSWER

explain plateaus experiment

Posted by Nancy Rajput 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Ankit Singh 6 years, 11 months ago

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.

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A mass of 5kg is moving along a circular path of radius 1m if the mass moves with 300 revolutions per minute its kinetic energy would be

Posted by Robin Rajput 6 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Procedures of vector addition

Posted by Vikash Kumar 6 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

I am unable to find the time period of kinetic energy of SHM

Posted by Priyanka Ramanujam 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Rs N 6 years, 11 months ago

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

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Calculate the total pressure inside a spherical air bubble of radius 0.1mm at a depth of 10cm below the surface of liquid of density 1.1g /cc and st 50 dyne height of mercury in barometer is 76cm

Posted by Vivek Mishra 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Subodh Joshi 4 years, 11 months ago

calculate the total pressure in inside a spherical bubble of radius 0.2 mm formed inside water at a depth of 10cm surface tension of water at a depth of 10cm is 79 inverse barometric pressure is 76 and density of mercury is 13.6 GCM - 3 and Z is equal to 980 CSC CMS -2

ANSWER

Define zero erorr

Posted by Bhaskar Shrivas 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Priya Dharshini ? 6 years, 11 months ago

it is a type of error in which an instrument gives a reading when the true reading at that time is zero.

ANSWER

Explain about the impulse

Posted by Yash Sharma 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

Impulse is a term that quantifies the overall effect of a force acting over time. It is conventionally given the symbol $J$ 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

ANSWER

Define relative error nd its derivation

Posted by Divyanshu Aditya Aditya 6 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Assumed that a tunnel is dugged across the earth passing through its centre.Find the time a particle takes ti cover the length of tunnel if (a) it is projected into the tunnel with a speed of √2gr (b) it is released frin a height R from the tunnel (c) it is thrown vertically upwards from the length of the tunnel with speed √gr.

Posted by Avi Singh 6 years, 11 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is Tention?

Posted by Hero Razz 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Priya Dharshini ? 6 years, 11 months ago

Tension is a force related to the stretching of an object (the opposite of compression) .

4Thank You

ANSWER

Where I found all derivation of gravitation

Posted by Riya Singh 6 years, 11 months ago

CBSE > Class 11 > Physics

5 answers

Ayush Garg 6 years, 11 months ago

Sl arora

Shruti Gupta 6 years, 11 months ago

HC verma is also good

Ankit Singh 6 years, 11 months ago

Sl arora is a good book

Nancy Rajput 6 years, 11 months ago

yes sl arora is good book

Ravi Damor 6 years, 11 months ago

S.l arora reference book is good for it

ANSWER

what is the value of G??????

Posted by Devraj Prajapati 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 6 years, 11 months ago

G = Universal Gravitational Constant=6.67×10^-11Nm^2kg^-2

ANSWER

What is the relation between momentum and KE

Posted by Shruti Gupta 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 6 years, 11 months ago

KE=P^2/2m

ANSWER

What is the dimension of a physical quantity corresponding to calorie.

Posted by Zaid Mohd 6 years, 11 months ago

CBSE > Class 11 > Physics

7 answers

Aman Kumar 6 years, 11 months ago

Good ?

Ankit Singh 6 years, 11 months ago

How are u bro

Ankit Singh 6 years, 11 months ago

Hi Aman

Aman Kumar 6 years, 11 months ago

???

Ankit Singh 6 years, 11 months ago

???

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

dekh ker copy paste kerna hota hai,,, Hindi translation bhe copy ho gyi... ?

Mr. Rajput 6 years, 11 months ago

what is the dimension of a physical quantity corresponding to calorie Results in English कैलोरी के लिए इसी एक भौतिक मात्रा के आयाम क्या है हिन्दी में नतीजे In a popular use of the term calorie, dietitians loosely use it to mean the kilocalorie, sometimes called the kilogram calorie, or large Calorie (equal to 1,000 calories), in measuring the calorific, heating, or metabolizing value of foods.

ANSWER

a spinning cricket ball in air does not follow a parabolic trajectory.explain why

Posted by ???. Pragati 6 years, 11 months ago

CBSE > Class 11 > Physics

4 answers

Ankit Singh 6 years, 11 months ago

Nice question also ✌✌?

Ankit Singh 6 years, 11 months ago

Well explined priya ?????

Priya Dharshini ? 6 years, 11 months ago

spinning cricket ball in air does not follow a parabolic trajectory. ... This decreases the velocity of air flowing below the ball. Hence, the pressure on the upper side of the ball becomes lesser than that on the lower side. Hence curved path is followed

Amayra Singh 6 years, 11 months ago

The velocity of the air below the ball is decreased because these two motions are opposing each other. Thus, the pressure on the upper side of the ball is lesser and there is an upward force that works upon the ball. This makes the ball follow a curved path and not a parabolic trajectory.

ANSWER

Expression for traingle law of vector addition

Posted by Maunisha Mallan 6 years, 11 months ago

CBSE > Class 11 > Physics

4 answers

Maunisha Mallan 6 years, 11 months ago

thnx to all ji..for ur answers

Maunisha Mallan 6 years, 11 months ago

thnx dear

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

if 2 vectors can be represented both in magnitude and direction by the 2 side of ⛛ taken in the same oder, then their resultant is represented completely, both in magnitude and direction, by the 3rd side of the ⛛ taken in the opposite oder.

Mr. Rajput 6 years, 11 months ago

Statement of Triangle Law If 2 vectors acting simultaneously on a body are represented both in magnitude and direction by 2 sides of a triangle taken in an order then the resultant(both magnitude and direction) of these vectors is given by 3rd side of that triangle taken in opposite order. Derivation of the law Consider two vectors P and Q acting on a body and represented both in magnitude and direction by sides OA and AB respectively of a triangle OAB. Let θ be the angle between P and Q. Let R be the resultant of vectors P and Q. Then, according to triangle law of vector addition, side OB represents the resultant of P and Q.

ANSWER

What is the cause of excess pressure inside a soap bubble?

Posted by Divya Tripathy 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Mr. Rajput 6 years, 11 months ago

Beause higher pressure than the local atmosphere is required to make the bubble in the first place! This requirement comes from the need to counterbalance the surface tension

ANSWER

Derive an expression for excessive pressure in a soap bubble

Posted by Pulkit Grover 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Mr. Rajput 6 years, 11 months ago

Due to excess pressure inside the liquid drop, the free surface of the drop will experience the net force in the outward direction due to which the drop expands.

ANSWER

Law of equipartition. Of energy

Posted by Harsh Biologist 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

The law states that: “In thermal equilibrium, the total energy of the molecule is divided equally among all Degrees of Freedom of motion”.
According to the law of equipartition of energy, for any dynamic system in thermal equilibrium, the total energy for the system is equally divided among the degree of freedom.

ANSWER

Why ice only freeze on the surface of lakes but not at bottom

Posted by Ayush Pandey 6 years, 11 months ago

CBSE > Class 11 > Physics

1 answers

Krishna Krishna Chaturvedi 6 years, 11 months ago

Because at bottom the density of water at bottom is maximum and due to anamolous behaviour of water at maximum density the temperature of water is 4 C thats why it not freezes