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Show HN: I built four eight-foot-long handwriting robots

Show HN: I built four eight-foot-long handwriting robots

Show HN: I built four eight-foot-long handwriting robots

Show HN: I built four eight-foot-long handwriting robots

Show HN: /dev/esc is an online escape room for dev teams

Show HN: /dev/esc is an online escape room for dev teams

Show HN: Pytest-watcher – A working alternative to Pytest-watch

Show HN: Forlater.email – an email-based bookmarking service

Show HN: Forlater.email – an email-based bookmarking service

Show HN: Forlater.email – an email-based bookmarking service

Show HN: Monitoring and automation for email servers, starting with Postfix

Show HN: Monitoring and automation for email servers, starting with Postfix

Show HN: I was playing with fundamental constants and 13.8 b years popped out

I was playing around with fundamental constants and out popped 13.8 billion light years. What is going on?<p>the wavelength of an electron mass photon / (2pi) * the charge radius of a proton / the black hole radius of a proton = 13.8 billion light years<p>((h / (m_e * c * 2pi)) * (h / (m_p * c * pi/2)) / (2G * m_p / c^2)) = 13.8 billion light years<p>https://www.wolframalpha.com/input/?i=(h+/+(m_e+<i>+c+</i>+2pi))+<i>+(h+/+(m_p+</i>+c+<i>+pi/2))+/+(2G+</i>+m_p+/+c^2)+to+light+years&assumption="UnitClash"+->+{"G",+{"GravitationalConstant"}}&assumption="UnitClash"+->+{"m_e",+{"ElectronMass"}}&assumption="UnitClash"+->+{"c",+{"SpeedOfLight"}}&assumption="UnitClash"+->+{"h",+{"PlanckConstant"}}

Show HN: I was playing with fundamental constants and 13.8 b years popped out

I was playing around with fundamental constants and out popped 13.8 billion light years. What is going on?<p>the wavelength of an electron mass photon / (2pi) * the charge radius of a proton / the black hole radius of a proton = 13.8 billion light years<p>((h / (m_e * c * 2pi)) * (h / (m_p * c * pi/2)) / (2G * m_p / c^2)) = 13.8 billion light years<p>https://www.wolframalpha.com/input/?i=(h+/+(m_e+<i>+c+</i>+2pi))+<i>+(h+/+(m_p+</i>+c+<i>+pi/2))+/+(2G+</i>+m_p+/+c^2)+to+light+years&assumption="UnitClash"+->+{"G",+{"GravitationalConstant"}}&assumption="UnitClash"+->+{"m_e",+{"ElectronMass"}}&assumption="UnitClash"+->+{"c",+{"SpeedOfLight"}}&assumption="UnitClash"+->+{"h",+{"PlanckConstant"}}

Show HN: Flowbite – Tailwind CSS Components Library

Show HN: Flowbite – Tailwind CSS Components Library

Show HN: Flowbite – Tailwind CSS Components Library

Show HN: Ishim – find available one-word domain names

Show HN: Ishim – find available one-word domain names

Show HN: Ishim – find available one-word domain names