This class also contains the subclass known as Protoplanetary Nebulae (PPN). This applies to astronomical objects that are experiencing a short-lived episode in a star’s evolution. This is the rapid phase that takes place between the Late Asymptotic Giant Branch (LAGB) and the following Planetar...
Despite decades of study, scientists still don't know exactly what dark matter is made of. They do know it's not made of ordinary atoms — the same kind of matter that makes up stars, planets, and people. That kind of matter is called "baryonic," and dark matter appears to be "non...
To achieve lasing, the rate of stimulated emission needs to be higher than the rate of absorption. For this to happen, the number of atoms (N), or population, in a higher energy state needs to be greater than the population in the ground state. This is known as population inversion. At...
Atoms and/or molecules in two or more elements can join together to form a compound. This compound, which is the basis of matter, may not resemble any of the original ingredients. For example, sodium and chlorine, two highly poisonous elements that are unstable at room temperatures, combine ...
The tungsten filament is inserted head-down into a cone called the Wehnelt cup. The filament and Wehnelt cup form the negatively charged cathode, which effectively “forces” the electrons to flow towards an anode, which is a metal disk with a hole in the center. This focuses the beam, ...
The resulting structure of two bonded amino acids is called a. The building blocks of proteins are amino acids. What are the covalent bonds between amino acids called? When two amino acids join together, they form a (blank). What is the name of the type of bond that forms between ...
(𝛀). The universe has the critical density if it contains, on average,six hydrogen atoms per cubic meter. But matter is not spread evenly throughout the universe. We know this because we see it concentrated within galaxies and absent in the gaps between galaxies. However, when we talk ...
Answer to: What is a monomer? What is a polymer? What are the differences between a monomer and a polymer? What is a dehydration reaction? By...
It should not be thought, however, that anarchism is only a critique of modern civilisation, just “negative” or “destructive.” It is also a proposal for a free society. Emma Goldman expressed what might be called the “anarchist question” as follows:“The problem that confronts us today...
The arrangement of atoms within a molecule is called the molecular structure. The molecular structure varies depending upon which atoms are in the...Become a member and unlock all Study Answers Try it risk-free for 30 days Try it risk-free Ask a question Our experts can answer your ...