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3 years ago

Would it be easier to pull the tablecloth out from under a glass of water or an

1 answer:

3 0

Glass as it is heavier and by newtons first law and inertia the greater the mass = more inertia(resistance to chabge in motion) thus the glass has a greater mass than an empty paper cup and thus has greater inertia. So it would be easier to leave it in place

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For fully developed laminar pipe flow in a circular pipe, the velocity profile is u(r) = 2(1-r2 /R2 ) in m/s, where R is the inn

sdas [7]

Answer:

a) $v_{max} = 2\ \textup{m/s}$

b) $v_{avg} = 1\ \textup{m/s}$

c) Q = 1.256 × 10⁻³ m³/s

Explanation:

Given:

The velocity profile as:

$u(r) = 2(1-\frac{r^2}{R^2} )$

Now, the maximum velocity of the flow is obtained at the center of the pipe

i.e r = 0

thus,

$v_{max}=u(0) = 2(1-\frac{0^2}{R^2} )$

$v_{max} = 2\ \textup{m/s}$

Now,

$v_{avg} = \frac{v_{max}}{2}\ \textup{m/s}$

$v_{avg} = \frac{2}}{2}\ \textup{m/s}$

$v_{avg} = 1\ \textup{m/s}$

Now, the flow rate is given as:

Q = Area of cross-section of pipe × $v_{avg}$

Q = $\frac{\pi D^2}{4}\times v_{avg}$

Q = $\frac{\pi 0.04^2}{4}\times 1$

Q = 1.256 × 10⁻³ m³/s

7 0

3 years ago

Gravity will have a greater effect on an object with

prohojiy [21]

The correct option is B. More mass

Hope this helps you

Brainliest would be appreciated

-AaronWiseIsBae

7 0

3 years ago

Read 2 more answers

What is the equation of universal law of garavitation

Vladimir79 [104]

Answer:

$F= \frac{GmM}{ {r}^{2} }$

G= gravitational constant

F= Gravitational force

m= mass of object 1

M= mass of object 2

r= distance between two objects

5 0

3 years ago

BRAINLIST!!!!! USE 3-7 SENTENCES!!!!

san4es73 [151]

Answer:

ik what a metaphor is obviously it's not using like or as I'm learning the same thing but one thing I will answer this for u if I would have access to the story thank you

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3 years ago

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A policeman investigating an accident measures the skid marks left by a car on the horizontal road. He determines that the dista

sleet_krkn [62]

<h2>The velocity of car was m m/s </h2>

Explanation:

When the car skids , its centripetal force is provided by frictional force .

Here centripetal force F = $\frac{mv^2}{r}$