Which Way does the Flame Point?

Jaywant H Arakeri

Consider the following experiment: lighted candles are placed at each end of a rigid bar pivoted in the centre and rotating in a horizontal plane; the candles are enclosed in transparent containers (Figure 1). When the bar is not rotating the flames points upwards. Which way do the flames point when the bar is rotating?

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Address for Correspondence
Jaywant H Arakeri 
Department of Mechanical Engineering 
Indian Institute of Science 
Bangalore 560 012, India. Email: jaywant@mecheng.iisc.ernet.in 

Chromatography An Educational Tool

Rekha Rajiv Vartak

The technique of chromatography is studied to bring forth the underlying concepts such as adsorption, partition, polarity/non-polarity of a compound. The materials required are very simple such as chalk, starch, ink, etc. Once the concepts are understood, the technique can be easily extrapolated to analyze complex biological samples as well.

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Address for Correspondence
Rekha Rajiv Vartak 
Visiting Fellow Biology 
Department Homi Bhabha Center 
for Science Education 
(TIFR) Mumbai 400005, India.