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3 years ago

The type of energy possessed by a fluid above its base level is

Physics

2 answers:

Nonamiya [84]3 years ago

5 0

Answer:

Potential energy.

Explanation:

By the definition of potential energy we know that it is the energy possessed by the body by the virtue of its position. It is different from kinetic energy which is the virtue of the motion of a body.

Now formula of potential energy is:

PE = mgh

Where

PE = Potential energy

m = Mass of body

g = Acceleration due to gravity

Now imagine a container filled with water. Everyone knows that water is contained in form of tiny molecules which can be considered as layers on each other. Now the layers get higher and higher, each molecule on the higher layer is getting farther and farther from the base line of container.

Now according to formula of potential energy,

mass and acceleration due to gravity are same but height is increasing continuously, thus every molecule has greater potential energy comparing the molecule which belongs to the lower layer. In this way you can see that the only energy contained by the molecules of fluid at the higher level than the base is potential energy.

Now PE at base = mgh(1)

PE = at height = mg(h2)

since h2>h1

So magnitude of potential energy at the higher level will increase. So you can say that, above the base level, energy possessed by a fluid is Potential Energy.

zysi [14]3 years ago

3 0

Potential energy due to gravity

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What would be the weight of the moon if it were resting on the surface of the earth

kari74 [83]

We need to be careful here.
The calculation of the gravitational force between two objects
refers to the distance between their centers.
The minimum possible distance between the Earth's and moon's
centers is the sum of their radii (radiuses).

Earth's radius . . . . . 6,360 km = 6.36 x 10⁶ meters
Moon's radius . . . . . 1,738 km = 1.738 x 10⁶ meters
Sum of their radii = 8.098 x 10⁶ meters

Also:
Earth's mass . . . . . 5.972 x 10²⁴ kg
Moon's mass . . . . . 7.348 x 10²² kg

and now we're ready to go !

 Gravitational force =

 G M₁ M₂ / R²

= (6.67 x 10⁻¹¹ N-m²/kg²)(5.972 x 10²⁴ kg)(7.348 x 10²² kg)/(8.098 x 10⁶ m)²

= (6.67 · 5.972 · 7.348 / 8.098²) · (10²³) Newtons

= (I get ...) 4.463 x 10²³ Newtons

That's almost exactly 10²³ pounds

 = 50,153,000,000,000,000,000 tons.

Those are big numbers.
All I can say is: I wouldn't exactly call that "resting" on the surface".

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3 years ago

An important dimensionless parameter in certain types of fluid flow problems is the Froude number defined as V/√g.l where V is a

prohojiy [21]

Answer:

1.24611

Explanation:

V = Velocity = 10 ft/s

L = Length = 2 ft

g = Acceleration due to gravity = 32.2 ft/s²

Froude number is given by

$Fr=\dfrac{V}{\sqrt{gL}}\\\Rightarrow Fr=\dfrac{10}{\sqrt{32.2\times 2}}\\\Rightarrow Fr=1.24611$

Converting to SI units

$10\ ft/s=10\times \dfrac{1}{3.281}$

$32.2\ ft/s^2=32.2\times \dfrac{1}{3.281}$

$2\ ft=2\times \dfrac{1}{3.281}$

$Fr=\dfrac{V}{\sqrt{gL}}\\\Rightarrow Fr=\dfrac{10\times \dfrac{1}{3.281}}{\sqrt{32.2\times \dfrac{1}{3.281}\times 2\times \dfrac{1}{3.281}}}\\\Rightarrow Fr=1.24611$

The Froude number is 1.24611

The Froude number is equal. The Froude number is dimensionless as the units cancel each other. In order for this to happen the units used need to be consitent either imperial or SI.

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kolbaska11 [484]

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