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Žarko Stevanović

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127
points
49
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125. Reyhan S 51
126. Abdallah Fazil 51
127. Žarko Stevanović 49
128. Samantha Wilson 48
129. Matthew Greenwood 48
last 3 solved tasks
Can you name the athletes by the picture?
Can you name the athletes by the picture?
What 3 digit number has a tens digit that is 5 more than the ones digit and a hundreds digit that is 8 less than the tens digit?

Hendrik Christoffel Van de Hulst

Born 19 Nov 1918; died 31 Jul 2000 at age 81.Dutch astronomer who predicted theoretically (1944) that in interstellar space the amount of neutral atomic hydrogen, which in its hyperfine transition radiates and absorbs at a wavelength of 21 cm, might be expected to occur at such high column densities as to provide a spectral line sufficiently strong as to be measurable. Shortly after the end of the war several groups set about to test this prediction. The 21-cm line of atomic hydrogen was detected in 1951, first at Harvard University followed within a few weeks by others. The discovery demonstrated that astronomical research, which at that time was limited to conventional light, could be complemented with observations at radio wavelengths, revealing a range of new physical processes.

I'm lost

A small boy was lost, so he went up to a policeman and said, "I've lost my dad!"

The policeman said, "What's he like?"

The little boy replied, "Chips and beer."

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