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faust18 [17]
3 years ago
7

The army has cars and boats etc right

Engineering
1 answer:
pochemuha3 years ago
7 0

Answer:

Yes this is true we have anything except the flying fighter we call them in if we need them by support

Explanation:

The army is a good place to learn how to drive cool things how to drive a tank thats why the army owns all this army things helps us stay safe and protect the usa government

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For a fluid with a Prandtl Number of 1000.0, the hydrodynamic layer is thinner than the thermal boundary layers. a) True b) Fals
kvv77 [185]

Answer:

(b)False

Explanation:

Given:

 Prandtl number(Pr) =1000.

We know that   Pr=\dfrac{\nu }{\alpha }

  Where \nu is the molecular diffusivity of momentum

             \alpha is the molecular diffusivity of heat.

 Prandtl number(Pr) can also be defined as

    Pr=\left (\dfrac{\delta }{\delta _t}\right )^3

Where \delta is the hydrodynamic boundary layer thickness and \delta_t is the thermal boundary layer thickness.

So if Pr>1 then hydrodynamic boundary layer thickness will be greater than thermal boundary layer thickness.

In given question Pr>1 so  hydrodynamic boundary layer thickness will be greater than thermal boundary layer thickness.

So hydrodynamic layer will be thicker than the thermal boundary layer.

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3 years ago
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ratelena [41]
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3 years ago
Statement true about fats in food
Elodia [21]

Answer:

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gizmo_the_mogwai [7]

Answer:

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3 years ago
A body whose velocity is constant has a. positive acceleration b. negative acceleration g. zero acceleration d. all of the above
adoni [48]

Answer:

option (c) is the correct answer which is zero acceleration.

Explanation:

It is given in the question that the velocity is constant.

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the options are provided in relation to the acceleration.

We know,

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