Table of Contents
Dance of the doomed particles
Scientists are puzzled by an unexpectedly giant hole within the power ranges of an unique “atom” known as positronium, which consists of an electron and a positron, Emily Conover reported in “Positronium result baffles physicists” (SN: 9/12/20, p. 14).
Reader Lee Skinner requested why the electron and its antimatter counterpart, the positron, don’t simply annihilate one another after they collide.
Finally, the electron and positron do annihilate each other, Conover says. Consequently, positronium doesn’t stick round without end. “The 2 particles perform a little orbital dance with one another for a time period earlier than they meet up and annihilate,” she says. “That’s really a part of how the researchers made the measurement, although I didn’t have the house to incorporate these particulars within the story.” The crew measured how lengthy it took electrons and positrons to annihilate, which is determined by the atoms’ power stage. “Timing that annihilation revealed whether or not the positronium atoms had jumped to a brand new power stage or not,” Conover says.
What’s the excitement?
Pollination by wild bees accounts for about $1.5 billion price of yields for six U.S. crops, Susan Milius reported in “Wild bees are moneymakers for some U.S. farms” (SN: 9/12/20, p. 5).
Reader Steve Robinson puzzled what species of untamed bees the researchers noticed.
Milius is glad that readers acknowledge there are a lot of sorts of untamed bees. “Widespread teams noticed within the survey included bumblebees, carpenter bees, Andrena mining bees and squash bees — named for a few of their favourite flowers,” she says.
Cold and warm
A examine of glass beads hints at how scorching water can freeze sooner than chilly water, Emily Conover reported in “Hot beads chilled faster than cool ones” (SN: 9/12/20, p. 16).
“Makes you surprise about warming. Has anyone carried out the alternative experiment?” reader Robert Chester requested.
Conover hasn’t seen experimental proof for chilly water warming sooner than scorching water, however she says there’s a theoretical examine that means the impact is feasible. For sure idealized supplies, scientists have proven mathematically that atoms may warmth up sooner after a precooling section. Scientists finally might search for the impact in actual supplies akin to magnetic alloys (SN On-line: 2/13/20).