Thus by 1803 there were two known rare earth elements, yttrium and cerium, although it took another 30 years for researchers to determine that other elements were contained in the two ores ceria and yttria (the similarity of the rare earth metals' chemical properties made their separation difficult).
For instance, students who pursue a Ph.D. in psychology usually take from five to seven years depending upon required coursework as well as internship and supervised residency requirements.
Q: How long does it take to get a degree in forensic psychology? A: The time duration for each degree program in forensic psychology varies. A bachelor degree in forensic psychology takes around four years to complete. On the other hand, a master's degree in forensic psychology takes two years to complete.Short courses in this field can be completed in 6 to 8 months.: The time duration for each degree program in forensic psychology varies. A bachelor degree in forensic psychology takes around four years to complete. On the other hand, a master's degree in forensic psychology takes two years to complete. Short courses in this field can be completed in 6 to 8 months.