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

State that the pressure exerted by a liquid of density rho (p) , at a depth h is p = pgh; State the factors affecting the pressure at a point in a liquid; state the laws of liquid pressure. Pressure gauge. Derive p = pa + ρgh; Realise cross - sectional or base area or the shape do not determine Liquid Pressure. Understand that the liquid pressure is same at all points at the same depth; Hydrostatic paradox.

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a pump can throw up 10 quintals of coal per hr from coal mine 120 m deep calculate the power of the engine in wattt assuming that efficiency is 80%

Posted by Tanya Gulati 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 4 months ago

<div>Energy used in pumping = mgh
h is the height upto which coal is to be taken out.

1 quintal = 100 kg
E = 1000 ×10 ×120 = 1200000 j
power = energy/time

time = 1 hour = 3600 s
Power = 1200000/3600 = 1000/3 watt
efficiency = 80%
Power of the engine = 10003 × 80100 = 266.66 watt</div>

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Why can speed of a particle not be negative

Posted by Annunay Das Das 4 years, 9 months ago

CBSE > Class 11 > Physics

1 answers

Tec Om 4 years, 9 months ago

because " distance can't be negative" but whenever we talk about velocity then it can be positive negative or may be zero just because of displacement

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ANSWER

Which topics are important in gravitation chapter??

Posted by Nancy Sharma 4 years, 9 months ago

CBSE > Class 11 > Physics

3 answers

First Name 4 years, 9 months ago

Msin topics which are not deleted by cbse knly

2Thank You

Nancy Sharma 4 years, 9 months ago

And for the 12th prospective??

1Thank You

First Name 4 years, 9 months ago

All (in the eye of JEE and NEET)

5Thank You

ANSWER

Pascal's law and its application (hydraulic acid and hydraulic brakes)

Posted by Lalthan Mawii 4 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

16. Two vessels of different materials are identical in size and shape. Both are filled with equal masses of boiled water and are placed on the same heater. If thermal conductivities of the metals of the vessels be 5 * 10 ^ - 2 and 3*10^ -2 kcal/(s-m.^ C) respectively, then calculate the ratio of the timings taken by the water in the vessels to convert in steam. (Ans. 3/5 .)

Posted by Ayush Sharma 4 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

One litre of ideal gas is compressed isothermally at 0.72 m of Hg column so that its volume becomes 0.9 litre. Find it's stress, if the density mercury is 13.6 x 10^3 kg/m^3

Posted by Khushi Mittal 4 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 4 months ago

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ANSWER

the position of an object moving along y axis is given by y=5t^3+3t^2-10t+4 find the velocity and acceleration of the object at time interval of 2s

Posted by Isha Parsai 4 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A stone is thrown vertically upwards from the surface of Earth. What is the direction of the velocity and acceleration of the stone?

Posted by Sundaresh S 4 years, 9 months ago

CBSE > Class 11 > Physics

2 answers

Abirami Kamalbabu 4 years, 9 months ago

Velocity is acting upwards and acceleration is acting downward due to the acceleration due to gravity.

2Thank You

Swastik . P 4 years, 9 months ago

Acceleration =-g ,which means it is acting downward.

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Avagadros law

Posted by Rinnah Sunil 4 years, 9 months ago

CBSE > Class 11 > Physics

1 answers

Arushi Dhiman 4 years, 9 months ago

U can search ..?

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ANSWER

Newton's law of motion?

Posted by Aadya Singh 4 years, 9 months ago

CBSE > Class 11 > Physics

4 answers

Ankur Yadav 4 years, 6 months ago

1 law is that a body continues to be in its state of rest or motion untill and unless an external force is applied on it 2 law is that rate of change of momentum of a body is directly proportional to force applied on it and directed as that of force. 3law is that there is an equal and opposite reaction for every action.

0Thank You

Poonam Dhakar 4 years, 8 months ago

Konsa law 1 ,2 ya 3

0Thank You

Aadya Singh 4 years, 9 months ago

4Thank You

?Ritesh Gupta? 4 years, 9 months ago

???

4Thank You

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Newton's law of motion ..?

Posted by Royal Thakur ? 4 years, 9 months ago

CBSE > Class 11 > Physics

3 answers

Aadya Singh 4 years, 9 months ago

Good mrng ?‍♀️

3Thank You

First Name 4 years, 9 months ago

The one who said 'rahul' in my that question is not suhana

4Thank You

Aadya Singh 4 years, 9 months ago

For every action, there's an equal n opposite reaction.

5Thank You

ANSWER

Types of energy?

Posted by Aadya Singh 4 years, 9 months ago

CBSE > Class 11 > Physics

2 answers

Aadya Singh 4 years, 9 months ago

Vdiyaaa.. aap? ?‍♀️

2Thank You

Aadya Singh 4 years, 9 months ago

Gud evng ?

3Thank You

ANSWER

Suhana right now answer what is your name . Else I will post your ids of other platforms here

Posted by First Name 4 years, 9 months ago

CBSE > Class 11 > Physics

2 answers

Aadya Singh 4 years, 9 months ago

Suhana mat likho bhai ?‍♀️ vo nhi hai... koi us name se id bna k thanks kar rha.... ?

4Thank You

Rahul Somannavar 4 years, 9 months ago

Rahul

2Thank You

ANSWER

The time period of a body executing SHM is 1s. After how much time will its displacement be of its amplitude

Posted by Varun Chaudhary 4 years, 9 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 4 years, 9 months ago

Q u es t i o n : The time period of a body executing S.H.M is 1s. After how much time will its displacement be 1/√2 of its amplitude.

A n s w e r ;

Given,

y = r sin ωt = r sin 2π/T t

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Can anyone suggest daily practice question website? If anyone know so please tell the name of that website

Posted by Ankit Singh? 4 years, 9 months ago

CBSE > Class 11 > Physics

1 answers

Gaur Saab?? 4 years, 9 months ago

I also want to know?

0Thank You

ANSWER

Who is in the name of suhana and shreya ?

Posted by First Name 4 years, 9 months ago

CBSE > Class 11 > Physics

4 answers

First Name 4 years, 9 months ago

#Ggggg Ggg i know its you tell your real name now ! You are suhana or not ? If you respect our nation then tell me this only. Then no more questions from me

2Thank You

_____ _____ 4 years, 9 months ago

Human

1Thank You

First Name 4 years, 9 months ago

Suhana has thanked this answer , it means if she doesn't reply she doesn't respect our nation. Very bad

2Thank You

First Name 4 years, 9 months ago

Kanun ki kasam bharat mata ki kasam reply kro dono , ab nhi to desh doob jyega

1Thank You

ANSWER

Please anyone help me in physics please ?