Draw a conclusion
observations
observations
producing a model
Hypotenuse
Matlock - 1986 The Investigation Part 1 2-16 was released on: USA: 2 February 1988
CSI Crime Scene Investigation - 2000 Last Supper 14-4 is rated/received certificates of: USA:TV-14
Yes, the police can take your keys during a search or investigation if they have a valid reason to do so, such as needing to access a locked area or vehicle as part of their investigation.
No , the last episode was #26 : "Investigation at Pinkerton" .
It means it's an important part of it.
A police investigation can last as long as law enforcement believes it is necessary. Many investigations have gone on for decades.
(1) Is it an ongoing investigation? (2) Is it part of your criminal trial? (3) Have you already been convicted and it's part of your trial package? If it's part of an investigation against you, you can't see it or gain access to it. If it's part of your trial or pre-trial procedure you can gain access to it by means of filing a motion for "disclosuure." If it's part of your trial case jacket, it is available at the Clerk Of the Court's Office where your trial was heard.
Using a balance to measure mass might be part of a scientific investigation, but by itself and under ordinary circumstances it does not amount to a scientific investigation. If you are on a different planet or on a moon, or if you were in the weightlessness of space, then doing this (or trying to do it) might be considered a kind of investigation.