Difference between a pillar drill and radial arm pillar drill

Engineering

1 answer:

jarptica [38.1K]3 years ago

8 0

Answer:

Pillar drill are small and used for woodworking while Radial arm pillar is mounted on a very large column.

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The Reynolds number is the major parameter that relates fluid flow momentum to friction forces. How is the Reynolds number defin

fiasKO [112]

Answer:

Reynolds number determines whether a flow is laminar or turbulent flow.

Explanation:

Reynolds number is defined as ratio of inertia force to the viscous force. it is a dimension less number. Reynolds number is used to describe the type of flow in a fluid whether it is laminar flow or turbulent flow. Reynolds number is denoted by Re.

When Reynolds number is in the range of 0 to 2000, the flow is considered to be laminar.

When Reynolds number is in the range of 2000 to 4000, the flow is considered to be transition.

And when Reynolds number is more than 4000, the flow is turbulent flow.

The boundary layer thickness for a fluid is given by

δ = $\frac{5\times x}{\sqrt{Re}}$

where δ is boundary layer thickness

x is distance from the leading edge

Re is Reynolds number

Thus from the above boundary layer thickness equation, we can see that the boundary layer thickness varies inversely to square root of reynolds number.

8 0

3 years ago

What software do you sue for design and the rapid prototyping machine?

mash [69]

Answer:

Computer Aided Design (CAD)

Explanation:

For design purpose and rapid prototyping, we use a software known as Computer Aided Design abbreviated as CAD.

Several production formates that are used in CAD are .stp, .stl, .igs, .step where formats like .stp, .igs and .step are used for rapid prototyping and format like .stl is used for design.

The information depending on the extensions used can be modeled in the 3-D files. The most frequent software used for prototyping are: AutoCAD, SolidWorks, SketchUP, etc

This also allows the spatial manipulation, dimension measurement and the visualization of the inner and outer parts.

3 0

4 years ago

If you were to plot the voltage versus the current for a given circuit, what would you expect the slope of the line to be? If no

Brut [27]

Answer:

Part 1: It would be a straight line, current will be directly proportional to the voltage.

Part 2: The current would taper off and will have negligible increase after the voltage reaches a certain value. Graph attached.

Explanation:

For the first part, voltage and current have a linear relationship as dictated by the Ohm's law.

V=I*R

where V is the voltage, I is the current, and R is the resistance. As the Voltage increase, current is bound to increase too, given that the resistance remains constant.

In the second part, resistance is not constant. As an element heats up, it consumes more current because the free sea of electrons inside are moving more rapidly, disrupting the flow of charge. So, as the voltage increase, the current does increase, but so does the resistance. Leaving less room for the current to increase. This rise in temperature is shown in the graph attached, as current tapers.