Tags Physics Mechanical Properties of Fluids

Physics Mechanical Properties of Fluids

Get insights from 95 questions on Physics Mechanical Properties of Fluids, answered by students, alumni, and experts. You may also ask and answer any question you like about Physics Mechanical Properties of Fluids

Follow Ask Question

Questions

Discussions

Active Users

Followers

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

A cube of mass ' $m$ ' and density ' $D$ ' is suspended from the point ' $P$ ' by a spring of stiffness $k$ as shown in figure. The system is kept inside a beaker filled with a liquid of density ' $d$ ', where $D > d$ . What is the elongation in the spring?

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

$k x = m g - F_{u p}$

$k x = m g - \frac{m d}{D} g$

$x = \frac{m g}{k} (1 - \frac{d}{D})$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

A rain drop of radius r falls in air with terminal velocity v. What is the terminal velocity of a rain drop of radius 3r?

0 Follower 3 Views

Vishal Baghel

Contributor-Level 10

$v_{T} \propto r^{2}$

$\frac{v_{T_{1}}}{v_{T_{2}}} = \frac{r_{1}^{2}}{r_{2}^{2}} = \frac{r^{2}}{9 r^{2}}$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

The velocity of liquid coming out of a small hole of a large vessel containing two different liquids shown in figure is

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

Applying Bernoulli's theorem

$\Rightarrow P_{0} + ρ g 2 h + 2 ρ g h + 0 = P_{0} + \frac{1}{2} 2 ρ v^{2}$

$\Rightarrow V^{2} = 4 g h$

$\Rightarrow v = 2 \sqrt[]{g h}$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

Mercury does not wet glass because

0 Follower 1 View

alok kumar singh

Contributor-Level 10

Cohesive force in mercury molecules are greater than adhesive force

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

An ideal fluid of density 800kgm^-³, flows smoothly through a bent pipe (as shown in figure) that tapers in cross-sectional area from a to $\frac{a}{2} .$ The pressure difference between the wide and narrow sections of pipe is 4100 Pa. At wider section, the velocity of fluid is $\frac{\sqrt[]{x}}{6} m s^{- 1}$ for x = ________. (Given g = 10 ms^-²)

0 Follower 3 Views

Raj Pandey

Contributor-Level 9

$ρ = 800 k g / m^{3}$

P₁ – P₂ = 4100 Pa

Bernoulli's question b/w (1) & (2)

$\frac{P_{1}}{ρ g} + \frac{v_{1}^{2}}{2 g} + z_{1} = \frac{P_{2}}{ρ g} + \frac{v_{2}^{2}}{2 g} + z_{2}$

⇒ $\frac{P_{1} - P_{2}}{ρ g} + \frac{v_{1}^{2}}{2 g} + 1 = \frac{v_{2}^{2}}{2 g} + 0$ -(1)

Equation of continuity

A₁v₁ = A₂v₂

v₂ = 2v₁ -(2)

from (1) & (2)

$\Rightarrow \frac{P_{1} - P_{2}}{ρ g} + \frac{v_{1}^{2}}{2 g} + 1 = \frac{{(2 v_{1})}^{2}}{2 g}$

$\frac{4100}{800 * 10} + \frac{v_{1}^{2}}{2 g} + 1 = \frac{4 v_{1}^{2}}{2 g}$

$\frac{12100}{8000} = \frac{3 v_{1}^{2}}{2 g}$

$\Rightarrow v_{1}^{2} = \frac{2 * 10}{3} * \frac{12100}{8000}$

$= \frac{2}{3} * \frac{121}{8}$

x = 363

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Mechanical Properties of Fluids

A small spherical ball of radius 0.1mm and density 10⁴kgm^-3 falls freely under gravity through a distance h before entering a tank of water. If, after entering the water the velocity inside water, then the value of h will be_________ m.

(Given g = 10 ms^-2, viscosity of water = 1.0 * 10^-5 N-sm^-2).

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

Since velocity does not change, so acceleration will be zero.

mg = FB + Fv $\Rightarrow \frac{4 π}{3} r^{3} ρ g = \frac{4 π}{3} r^{3} σ g + 6 π η r v$

$\Rightarrow v = \frac{2 r^{2} (ρ - σ) g}{9 η} = \frac{2 * 0.1 * 0.1 * 1 0^{- 6} * (1 0^{4} - 1 0^{3}) * 10}{9 * 1.0 * 1 0^{- 5}}$

$\Rightarrow h = \frac{400}{2 g} = 20 m$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

A water drop of diameter 2 cm is broken into 64 equal droplets. The surface tension of water is 0.075N/m. In this process the gain in surface energy will be:

0 Follower 2 Views

Raj Pandey

Contributor-Level 9

Gain in surface energy, $Δ U = T Δ A$

from volume centenary, $\frac{4}{3} π R^{3} = 64 * \frac{4}{3} π r^{3}$

$\Rightarrow r = \frac{R}{4}$

Initial surface area, Ai = 4pR²

final surface area, $A_{f} = 64 * 4 π r^{2}$

$∴ Δ U = 12 π R^{2} . T = 0.075 * 12 * 3.14 * 1 0^{- 4} = 2.8 * 1 0^{- 4} J$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

A small spherical ball of radius 0.1mm and density 10⁴kgm^-³ falls freely under gravity through a distance h before entering a tank of water. If, after entering the water the velocity inside water, then the value of h will be_________ m.

(Given g = 10 ms^-², viscosity of water = 1.0 * 10^-⁵ N-sm^-²).

0 Follower 3 Views

alok kumar singh

Contributor-Level 10

Since velocity does not change, so acceleration will be zero.

mg = F_B + F_v $\Rightarrow \frac{4 π}{3} r^{3} ρ g = \frac{4 π}{3} r^{3} σ g + 6 π η r v$

$\Rightarrow v = \frac{2 r^{2} (ρ - σ) g}{9 η} = \frac{2 * 0.1 * 0.1 * 1 0^{- 6} * (1 0^{4} - 1 0^{3}) * 10}{9 * 1.0 * 1 0^{- 5}}$

$\Rightarrow h = \frac{400}{2 g} = 20 m$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

A plastic ball is rising in water with terminal speed v. If we use a different plastic whose density is double that of the original ball but still less that density of water, keeping the radius same, the terminal speed would be:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$v = \frac{2}{9} \frac{r^{2} g (ρ - σ)}{η}$

$v' = \frac{2}{9} r^{2} g \frac{(ρ - 2 σ)}{η}$

0 0

New answer posted

2 months ago

Physics Mechanical Properties of Fluids Class 11th

The electric field line pattern for charges + 2q & - q are shown. Select the most appropriate diagram:-

0 Follower 14 Views

Vishal Baghel

Contributor-Level 10

Field lines are proportional to quantity of charge & they originate at positive charge & terminates at -ve charge or at $\infty$

0 0

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

65k Colleges
1.2k Exams
679k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

Physics Mechanical Properties of Fluids

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience