which unlike the bright supernovae we cannot observe. However, it is unclear how much mass these stars lose during black hole formation, or how large their natal kicks are. If the massive star directly collapses
If it's a bright, clear day outside, you may instinctively reach for your sunglasses when you head for the door. And you probably do it without much thought about them. But you probably do think about sunglasses when you go to buy a new pair -- whether you walk into the discount sto...
The movement of stars affects the wavelengths of light that we receive from them, much like the high-pitched sound from a fire truck siren gets lower as the truck moves past you. This phenomenon is called the Doppler effect. By measuring the star's spectrum and comparing it to the ...
How wide is the sun? How much does it weigh? How far is it from earth?Sun:The source of the light on earth is the sun. Sun is one of the stars made up of hydrogen and helium molecules. The nuclear fusion reaction between hydrogen and helium releases an enormous amount...
I bargained with the taxi driver over the price.题十一:I bought a dress for only 10 dollars in a sale; it was a real _.甲某系H县人民商场职工，凶涉嫌盗窃犯罪被H县公安机关侦查终结移送县人民检察院审查起诉。H县人民检察院经审查认为甲的行为依照刑法规定不需要判处刑罚，于是决定不起诉。H县人民...
Not only are atoms formed from smaller particles (protons and neutrons, which in turn are formed from quarks, and electrons), but they can also very much be split. Indeed, "splitting the atom" is a common phrase referring to nuclear fission power, and scarily the atomic bomb. There's a...
The answer was a“well, sort of”in that technology had replaced much of the thinking that used to be necessary. Yes, technology is a wonderful thing, but humans are increasingly going from driver to passenger on the tech bus. Carl Hillier ...
What is the atomic weight? How many kilometers are in 2,785 centimeters? Match the units to their metric weight: What is the mass (in kg) of 2.5 m^3 of air if the density of air is 0.0012 g/cm^3? How much does a typical African elephant weigh? How do you convert English to ...
How many total number of neutron are present ? Determine the mass number of a beryllium atom with 5 neutrons. How does one isotope differ from another? How to calculate protons, neutrons and electrons How is the atomic weight of an element determined? Which of among the atomic number, mass...
This is because when a neutron smacks an atom it may stick to it, turning that atom into another stable isotope or possibly a radionuclide. Unless you are either playing with Farnsworth Fusors or uranium reactors neutron radiation is not much of a concern, but nonetheless it is best shielded...