Yes, unfortunately they did just about anything you can think of to kill a Jew. Jews were like rats to them, they were non-human to Nazis and if the Nazis wanted to test something, they would use a Jew.
controlled experiments
scientific method
they put them in gas chambers, did experiments on them, starved them, beat them, and a lot of other harsh things that you cant ever imagine
There was no "Nazi medicine". If you are referring to the horrible experiments the Nazis made with human remains, there is no real reason they would attempt organ transplants.
doing experiments, they all had the same look (clothes haircut, and were given numbers) they barely got food if so it was stale bread
why do scientist perform experiments?
Chemists perform experiments to find out different kinds of matter can change.
Depends on what you call 'useful'. If it is useful to learn how to kill hundreds of people in the shortest amount of time, and to learn how to castrate hundreds of men in the shortest time, then, yeah, they were useful.
They were intreged witht the human body.
Scientists perform experiments to collect data.
Yes Dr. Christiaan Barnard did perform his first experiments on 50 dogs 35 cats and some rats.
things
Experiments.
When the entire country is under Nazi rule, it is very easy. Outside countries had to intervene to stop the experiments and the Nazi party.
To answer specific questions
To prove or disprove a theory. If you didn't perform experiments you wouldn't have the evidence to move forward in your scientific knowledge. Try an experiment 4 times to get a reliable average result.
Depends on what they're researching, but often in a laboratory.