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

Young' Modulus = stress/strain = F/A×e/l =ma/A×e/l Where, F is force, A is area of cross section, e is elongation, l is actual length, a is acceleration, m is mass. By their units, Y= [(Kg×m/s ki power 2)]/[(m)ki power 2×m/m)] Y=(kg×m)/(m ki power 2 × s ki power 2) Y=kg/m×s ki power 2 Therefore, dimensional formula of young's modulus is [ML^S*]. 《where ^ = -1 and * = -2.》☺☺

0Thank You

ANSWER

What is meant by f net

Posted by Rahul Mahra 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Aman Kumar 7 years, 4 months ago

It's means net force. The all over amount of force is acting on a body

2Thank You

ANSWER

A particle moves on the xy plane with velocity vx=8t-2 and vy=2. If it passes through the point x=14 and y=4 at t=2s, find the equation (x-y relation) of the path

Posted by Gourav Tripathy 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Chirag Solanki 7 years, 4 months ago

As we know y = int. v_y dt and x = int. v_xdt

y = int. 2 dt and x = int. ( 8t - 2 ) dt

y = 2t + c and x = 8t²/2 - 2t + k

but if t = 2 s then y = 4 and x = 14

so 4 = 4 + c and 14 = 4x4 - 4 + k

c = 0 and 14 = 16 - 4 +k

k = 2

so y = 2t and x = 4t² -2t + 2

by putting t = y/2 in x

we get x = y² - y +2 required equation

1Thank You

ANSWER

Uniform acceleration diagram plz i have confused

Posted by Bharatesh Munavalli 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Aman Kumar 7 years, 4 months ago

In this app, we didn't have the camera facility so.. We r helpless

0Thank You

ANSWER

What will be the dimension of Resistance ???????

Posted by Ashwini Kumar 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 4 months ago

sorry it's ML²L^-3 A^-2

1Thank You

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 4 months ago

ML²T^-3 A^-1

0Thank You

ANSWER

Explain the statement science is always dynamic with ex.

Posted by Ifeath Jahan 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is the meaning of dy/dx

Posted by Ashish Kumar 7 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Ashish Kumar 7 years, 4 months ago

It means rate change of function y with respect to x

3Thank You

Aman Kumar 7 years, 4 months ago

Nice?

2Thank You

Isha Bhardwaj 7 years, 4 months ago

Differentiation of' y' with respect to 'x'

1Thank You

ANSWER

Drive the three equation of motion by graphical method express condition under which they can be used

Posted by Unnati Bhardwaj 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Isha Bhardwaj 7 years, 4 months ago

Hey Unnati ... You will get them from you tube.....

3Thank You

ANSWER

Difference between horizontal and vertical

Posted by Shubham Sony 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Satendra Kumar Kumar 7 years, 4 months ago

Horizontal basically realted with x-axis and vertical with y-axis.

1Thank You

ANSWER

How is centripetal acceleration both inversely and directly proportional to the radius?

Posted by Nikita Pandey 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Why do helium balloons do not rise after certain height

Posted by Bharat Mathur 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Shruti Chouhan 7 years, 4 months ago

Because at max hight the atmospheric pressure decreses and the natural pressure of helium is very high i.e after certain hight the ballon do not rise and burst.

0Thank You

ANSWER

A Rain Drop of Radius 2mm falls from a height of 500m above the ground. It falls with decreasing acceleration until its half height . It attans its maximum speed and moves with uniform speed therefore what is work done by gravitational force on the first and half of its journey ?

Posted by Varun Chawla 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Define null vector

Posted by Aryan Chauhan 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Isha Bhardwaj 7 years, 4 months ago

We can say that the velocity vector of a body at rest is called null or zero vector

4Thank You

Himanshu Chauhan 7 years, 4 months ago

Point vector is a null vector or zero magnitude vector

1Thank You

ANSWER

A vector= 2i cab - 4j cab +2 k cab B vector =3i cab +4j cab +x k cab . Find the value of x if Avector and B vector are perpendicular.

Posted by Jyotheesh Khandelwal 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Aryan Chauhan 7 years, 4 months ago

R=0 as Avector and Bvector are perpendicular Thus, R = AxBx icab -AyBy jcab + AzBz kcab 0 = 6 - 16 + 2x 10= 2x X = 5

1Thank You

Jyotheesh Khandelwal 7 years, 4 months ago

Please answer it frequently its urgent

0Thank You

ANSWER

Errors kya hoye h

Posted by Deendayal Jatav 5 years, 8 months ago

CBSE > Class 11 > Physics

2 answers

Shruti Chouhan 7 years, 4 months ago

Any uncertinity in measurment is known as error

0Thank You

Himanshu Chaudhary 7 years, 4 months ago

Difference in true value and measured value of a quantity

2Thank You

ANSWER

Angular velocity Kya hota h

Posted by Suraj Mishra 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Physics lab mannual activity 1

Posted by Ashar Khan 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Aman Kumar 7 years, 4 months ago

Hmm...

1Thank You

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 4 months ago

it is about vernier calliper and screw gauge.

1Thank You

ANSWER

What is Vander Wall equation

Posted by Ravi Yadav 7 years, 4 months ago

CBSE > Class 11 > Physics

4 answers

Mr. Thakur☆☆ 7 years, 4 months ago

The vander waals equation of state approaches the ideal gas law PV=nRT as the values of these constant approach zero. The constant a provides a correction for the intermolecular force. Constant b is a correction for finite molecular size and its value is the volume of one mole of the atoms or molecules.

2Thank You

Mr. Thakur☆☆ 7 years, 4 months ago

2Thank You

Mr. Thakur☆☆ 7 years, 4 months ago

The vander waals equation was proposed in the year 1873. It was first step towards taking into account interaction forces which are acting between real gases molecules. The equation of state of the perfect aes refers to a gas consisting of point like items which do not interact with one another. Instead of this vander waals proposed an equation -------- (v-b)[p+a/v^]=RT where a and b are called vander waals constant and which have different value for each gas.

3Thank You

Aman Kumar 7 years, 4 months ago

(p+a/v^2)(v-b)=RT ....... I M NOT SURE... ?

2Thank You

ANSWER