Young Caucasian Dan Dunne teaches history and coaches the girls basketball team at a Brooklyn high school populated primarily by black and Hispanic students. To the chagrin of his superiors, Dan bucks the outlined curriculum of historical facts in favor of the philosophy of historical events, generally discussing the concept of dialectics. As such, he captures the imagination of his students, at least in the classroom. Outside of the classroom, Dan's life is in shambles. He has a distant but cordial relationship with his family. He uses illicit drugs rampantly. Although his former girlfriend Rachel was able to clean up her drug habit, Dan believes that rehab will not work for him. Due to a combination of these issues, he treats women poorly. Thirteen year old Drey is a student in his class and a player on his basketball team. Drey has her own problems. Her parents are divorced, with her father a virtually non-existent figure in her life and her EMT mother generally absent as she is ... Written by Huggo
The decay of a mixture of two or more materials which each decay exponentially, but with different half-lives, is not exponential. Mathematically, the sum of two exponential functions is not a single exponential function. A common example of such a situation is the waste of nuclear power stations, which is a mix of substances with vastly different half-lives. Consider a mixture of a rapidly decaying element A, with a half-life of 1 second, and a slowly decaying element B, with a half-life of 1 year. In a couple of minutes, almost all atoms of element A will have decayed after repeated halving of the initial number of atoms, but very few of the atoms of element B will have done so as only a tiny fraction of its half-life has elapsed. Thus, the mixture taken as a whole will not decay by halves.