Almas asked a question

Subject: Physics, asked on on 20/1/17

Two solid pieces, one of steel and the other of aluminium when immersed completely in water have equal weights. When the solid pieces are weighed in air
(1) The weight of aluminium is half the weight of steel
(2) Steel piece will weigh more
(3) They have the same weight
(4) Aluminium piece will weigh more
please explain.

Manideep Varma asked a question

Subject: Physics, asked on on 18/11/16

two liquids at temperature 60 degree c and20 degreec respectively have masses in the ratio 3:4 and their specific heats in the ratio 4:5.if the two liquids are mixed,the resultant temperature is?

Rashmika B asked a question

Subject: Physics, asked on on 21/3/17

A cylindrical vessel of cross - section A contains water to a height h.There is a hole in the bottom of radius ' a ' .The time in which it will be emptied is :

Samriddhi Vijay asked a question

Subject: Physics, asked on on 8/1/17

Two wires are of the same material have masses in the ratio 3:4. What is the ratio of their extensions under the same load , if their lengths are in the ratio 9:10?

Tks Arunachalam asked a question

Subject: Physics, asked on on 19/12/16

Question 10

10.(a) If n identical water droplets falling under gravity with terminal velocity v collides to form a single drop which has the terminal velocity 4v, find the number n.

(b) If the velocity of water near the surface of a 6 m deep river is 6 m/s, assuming uniform velocity gradient along the depth, find the shear stress between the horizontal layers of water ( coefficient of viscosity of water = 10^-2poise ).

Manideep Varma asked a question

Subject: Physics, asked on on 18/11/16

two liquids are at 40 degree c and 30 degree c.when they are mixed in equal masses the temperature of the mixture is 36 degree c.ratio of their specific heat is

Shubhangi Upadhyay asked a question

Subject: Physics, asked on on 19/10/17

Metal wire after being heavily loaded do not regain their lengths completely.explain why?

Almas asked a question

Subject: Physics, asked on on 17/1/17

A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with some acceleration, the reading will be ?
The soultion given is like -
P = dgh = d(g + a)h' = constant
Then, h' < h i.e., h' < 76 cm
Why have they taken pressure as constant ? Won't it change with the change in acceleration ?

Tks Arunachalam asked a question

Subject: Physics, asked on on 19/12/16

A s o l i d s p h e r e o f m a s s 2 k g a n d s p e c i f i c g r a v i t y s = 0.5 i s h e l d s t a t i o n a r y r e l a t i v e t o a \tan k f i l l e d w i t h w a t e r a s s h o w n i n f i g u r e . T h e \tan k i s a c c e l a e r a t i n g v e r t i c a l l y u p w a r d w i t h a c c e l e r a t i o n a = 2 m / s e c^{2} (a) C a l c u l a t e t h e t e n s i o n i n t h e t h r e a d c o n n e c t i n g t h e s p h r e a n d b o t t o m o f t h e \tan k s . (b) I f t h e t h r e a d s n a p s, c a l c u l a t e t h e a c c e l e r a t i o n o f t h e s p h e r e w i t h r e s p e c t t o t h e \tan k . (d e n s i t y o f w a t e r i s ρ = 1000 k g / m^{2} a n d g = 10 m / s e c^{2}) .

Tks Arunachalam asked a question

Subject: Physics, asked on on 19/12/16

Question 6 ,7

6. An incompressible non-viscous fluid (density

δ

) flows steadily through a cylindrical pipe which has radius 2R at point A and radius R at point B (at the same height as A) further along the flow direction. If the velocity and pressure at point A are v and P, respectively, find the pressure at B.

7. A cylindrical vessel filled with water upto a height of 2 m stands on a horizontal plane. The side wall of the vessel is a plugged circular hole touching the bottom. Find the minimum diameter of the hole so that the vessel begins to move on the floor if the plug is remove. The coefficient of friction between the bottom of the vessel and the plane is 0.4 and total mass of water plus vessel is 100 kg.

Shaffron asked a question

Subject: Physics, asked on on 2/12/17

The terminal velocity Vt of a spherical ball of lead of radius r falling through a viscous liquid varies with r such that (a)Vt/r=constant (b)Vt r =constant (c)Vt =constant (d)Vt/r^2=constant

Samriddhi Vijay asked a question

Subject: Physics, asked on on 8/1/17

Two wires are of the same material have masses in the ratio 3:4. What is the ratio of their extensions under the same load , if their lengths are in the ratio 9:10? a) 5/3 b] 27/30 c] 6/5 d] 27/25

Tks Arunachalam asked a question

Subject: Physics, asked on on 19/12/16

Qyes 8,9

Suroj Dey asked a question

Subject: Physics, asked on on 24/6/17

A small metal ball of mass m is suspended from a thread of length I between the plates of large plane capacitor. How will the period of oscillations of such a pedulum change if a c harge +e is placed on the ball and the upper plate is positively charged.

Manideep Varma asked a question

Subject: Physics, asked on on 20/11/16

please send quickly

Mansoor asked a question

Subject: Physics, asked on on 9/10/17

A tube of length 20 m and radius r m carries a steady flow of a liquid whose density and viscosity are 2 kgm−3 and 1 kgm−1s−1, respectively. The velocity of the fluid at a distance x from the centre of the tube is given as

. If the friction force exerted by the liquid on the tube is

N, then what is the value of r?

Shubhangi Upadhyay asked a question

Subject: Physics, asked on on 13/11/17

Oil spreads over the surface of water while water does not do so on oil surface .Explain.

Mansoor asked a question

Subject: Physics, asked on on 10/10/17

A tube of length 20 m and radius r m carries a steady flow of a liquid whose density and viscosity are 2kgm^−3 and 1kgm^−1s^−1, respectively. The velocity of the fluid at a distance x from the centre of the tube is given as v(x)=4-k*(x^2)/r .If the friction force exerted by the liquid on the tube is 60pi N, then what is the value of r?

Siddhant Kole asked a question

Subject: Physics, asked on on 29/3/19

Please explain the q in detail

Shubhangi Upadhyay asked a question

Subject: Physics, asked on on 13/11/17

Explain why small drops of water are spherical while big drops are flat?

Siddhant Kole asked a question

Subject: Physics, asked on on 24/3/19

Do we have to consider 2 surfaces? If yes then why?

Shubhrajyoti Ghosh asked a question

Subject: Physics, asked on on 5/11/16

Dear Experts, Please answer all the questions asked by me on 3rd November 2016. Please answer fast...

Vishal asked a question

Subject: Physics, asked on on 3/3/20

Find the ratio of the terminal velocities of two raindrops of radii R and R/3 in a viscous medium. Also draw a graph to show the variation of velocity of a small spherical body dropped gently in a viscous liquid, with time.

Yashika Bhanwar asked a question

Subject: Physics, asked on on 20/11/16

asscent formula??

Vishal asked a question

Subject: Physics, asked on on 3/3/20

Find the ratio of the terminal velocities of two raindrops of radii R
and R/3 in a viscous medium. Also draw a graph to show the
variation of velocity of a small spherical body dropped gently in a
viscous liquid, with time.

Mansoor asked a question

Subject: Physics, asked on on 14/9/17

Hi ,

I want to know whether NITs provide AEROSPACE ENGINEERING. How shall I prepare for entering into aerospace engineering ?

Geet Madhyam asked a question

Subject: Physics, asked on on 30/1/20

Sir I didn't understand working principle of pitot tube...its not over here

Akash Singh asked a question

Subject: Physics, asked on on 6/10/19

what is properties of matter.

Siddhant Kole asked a question

Subject: Physics, asked on on 24/3/19

Please explain this.

Shubhrajyoti Ghosh asked a question

Subject: Physics, asked on on 1/10/16

Young's modulus modulus for the material of a substance is 7.25*10¹⁰ N.m^-2 and its bulk modulus is 11*10¹⁰ N.m^-2 Find the Poison's ratio and modulus of rigidity of the substance.

Dinky Tandon asked a question

Subject: Physics, asked on on 2/1/21

Please solve this question

Find the ratio of the terminal velocities of two raindrops of radii R and R/3 in a viscous medium. Also draw a graph to show the variation of velocity of a small spherical body dropped gently in a viscous liquid, with time.​

Find the ratio of the terminal velocities of two raindrops of radii R
and R/3 in a viscous medium. Also draw a graph to show the
variation of velocity of a small spherical body dropped gently in a
viscous liquid, with time.