# Wikinews:Sandbox

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Welcome to the Wikinews Sandbox. Feel free to experiment with wikimarkup and other coding here. Take a look at our help documentation for help with editing. There's also a breadboard, testing template, and special testing page. If you want real-time help, you can join us in our IRC Channel. Refresh

Sandbox · Wikinews:Sandbox · Template:Sandbox · Sandbox

Hedwig is a 4-year-old little girl from Hanover, Germany, She are reading an physics science books in Kindergarten, Because she are first time to go to Kindergarten, also, she are a romantic girl, and she wearing an white dresses

"Chapter 1: Nuclear Force, Section 1: Proton and Neutron, an proton contains two up quarks and an down quark, and an neutron contains an up quark and two down quarks, hence this, an proton have an electric charge of +1, an neutron have an neutral charge, but why neutrons is slightly heavier than protons?", Hedwig asks kindergarten teacher

"Because an neutron can decay into an proton, so, neutron is slightly heavier than proton", Teacher answers

"Neutron have an half-life of 14 minutes and 40 seconds, but why neutron will decay?", Hedwig asks kindergarten teacher

"Because an neutron have an neutral charge, so, neutron will decay into an proton", Teacher answers

This time, Hedwig has seen an negative number in right-upper of number 10, but she doesn't know exponentiation because she are too young, so, Hedwig asks kindergarten teacher: "Teacher, what the negative number right-upper of number 10? but I'm doesn't know the this number right-upper the number 10"

"Hedwig, you doesn't know exponentiation, so, I'm help you to understanding exponentiation, for example, "10^2" can read as "10 raised to the 2nd power", but not "102", and 10 raised to the 2nd power equals 100, and 10 raised to the 3rd power equals 1,000, and the negative number is invert of positive number, for example, 10 raised to the negative 3rd power equals 0.001, so, you has understanded to see these exponential number", Teacher said

"Okay, teacher, I'm know that 10^3 equals 1,000, so, I'm can resume to reading this book", Hedwig said

"The mass of an proton was 1.67262×10^-27 kilograms, the mass of an neutron was 1.67493×10^-27 kilograms, and an proton's mass was 1,837 times of an electron, which an electron's mass was 9.10938×10^-31 kilograms", Hedwig said

This time, Hedwig has seen an greek letter Mu (μ), but she doesn't known greek letter because she doesn't living in Greece, so, Hedwig asks kindergarten teacher: "Teacher, what these strange alphabets? but I'm doesn't know this strange alphabet and I'm reads it as U"

"Hedwig, you doesn't know greek letter and you has readed this greek letter as "U", so, I'm help you to understanding greek letters, for example, the first greek letter was Alpha (α), the next was Beta (β), the third was Gamma (γ), the last was Omega (ω), and this greek letter was Mu (μ), so, you has understanded to see these greek letter", Teacher said

"Okay, teacher, I'm know that this greek letter was Mu (μ), and the formula shows Mu equals 1,837 (μ = 1,837), so, I'm can resume to reading this book", Hedwig said

"The nucleosynthesis era has created 87% of protons and 13% of neutron, and they has merged into 75% of hydrogen and 25% of helium, means for each 13 atoms, 12 are hydrogen atoms and 1 are helium atom, and the sun fuses 4 hydrogen atoms into 1 helium atom, although number of neutron in an atomic nucleus is more than proton, but why number of proton in universe is much more than neutron?", Hedwig asks kindergarten teacher

"Because the half-life of an neutron was only 14 minutes and 40 seconds, they has merged into only 25% of helium, and the nucleosynthesis has created only 13% of neutron, so, number of proton is much more than neutron", Teacher answers

"Caesium atom is the largest atom in the periodic table, Caesium atom nucleus contains 55 protons and 78 neutrons, and the caesium atom is used to define 1 second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the Caesium-133 atom, but why one second is very many as 9.193 billion periods of the radiation of the Caesium-133 atom?", Hedwig asks kindergarten teacher

"Hedwig, you think this very large number is an astronomical number, That is because the transition period of the Caesium-133 atom is very brief, and the radiation frequency of the Caesium-133 atom was 9.19263177 gigahertz, so, the one second is the duration of 9.19263×10^9 periods of the radiation of the Caesium-133 atom", Teacher answers