A counter-intuitive result of Oliver Heaviside showed how telegraph cables should be designed [see this week’s *That’s Maths* column (TM066) or search for “thatsmaths” at irishtimes.com].

## Posts Tagged 'Wave Motion'

### For Good Comms, Leaky Cables are Best

Published April 16, 2015 Irish Times Leave a CommentTags: Applied Maths, History, Wave Motion

### How Big was the Bomb?

Published September 18, 2014 Irish Times 1 CommentTags: Applied Maths, Fluid Dynamics, Physics, Wave Motion

By a brilliant application of dimensional analysis, G.I.Taylor estimated the explosive energy of the first atomic blast, the Trinity Test (see this week’s *That’s Maths* column in *The Irish Times, *TM053, or search for “thatsmaths” at irishtimes.com).

### The Biggest Harp in Ireland

Published September 4, 2014 Irish Times Leave a CommentTags: Geometry, Pythagoras, Wave Motion

This week’s *That’s Maths* column in *The Irish Times* (TM052, or search for “thatsmaths” at irishtimes.com) is about “Samuel Beckett Playing Bridge in Dublin”.

### White Holes in the Kitchen Sink

Published January 9, 2014 Occasional Leave a CommentTags: Applied Maths, Fluid Dynamics, Mechanics, Physics, Wave Motion

A tidal bore is a wall of water about a metre high travelling rapidly upstream as the tide floods in. It occurs where the tidal range is large and the estuary is funnel-shaped (see previous post on this blog). The nearest river to Ireland where bores can be regularly seen is the Severn, where favourable conditions for these hydraulic jumps occur a few times each year.

But you do not have to leave home to observe hydraulic jumps. Continue reading ‘White Holes in the Kitchen Sink’

### Interesting Bores

Published January 2, 2014 Irish Times Leave a CommentTags: Applied Maths, Fluid Dynamics, Geophysics, Mechanics, Wave Motion

This week’s *That’s Maths* column in the* Irish Times* ( TM036 ) is about bores. But don’t be put off: they are very interesting.

### Ducks & Drakes & Kelvin Wakes

Published May 18, 2013 Irish Times Leave a CommentTags: Applied Maths, History, Wave Motion

The theme of this week’s *That’s Maths* column in the* **Irish Times* ( TM021 ) is Kelvin Wakes, the beautiful wave patterns generated as a duck or swan swims through calm, deep water or in the wake of a ship or boat.

Continue reading ‘Ducks & Drakes & Kelvin Wakes’