Two of the three Watt's curves plotted in this worksheet display with gaps.

Why is this and how can these curves be displayed without gaps?

WattsCurve.mw

The uploaded worksheet is a failed attempt at this proof.

Please either refer me to or show me a valid proof.

  *** I have tried to upload my worksheet using the green arrow but the insert link operation of the upload failed ***

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This worksheet displays an intersection between two spheres based on a test which seems unrelated to the display.

How can this be explained?

Intersecting_spheres.mw

This worksheet animates part of the motion of the classic ladder sliding down a wall.

Please answer the two questions posed in the opening text.

Respondents will need to establish their own link to the DirectSearch package

Slide_Ladder.mw

The uploaded worksheet attempts to determine arc lengths of an ellipse by two methods. Why do their results differ?

ArcLength_of_Ellipse.mw