Final answer:
The statement that a precedence relationship shows the sequence of activities in a project is true. The position vs time graph of an object that is speeding up is curved, not straight, thereby making the statement false. Also, it is false that theories become laws over time as they are distinct kinds of scientific knowledge.
Step-by-step explanation:
Precedence relationships indeed show the sequence of activities in a project, and their primary purpose is to help in project scheduling by defining the order in which tasks must be performed. If we translate this concept into a project management scenario, the statement "A precedence relationship shows the sequence of activities in a project" is true.
Regarding the physics-related questions:
- True or False: The position vs time graph of an object that is speeding up is a straight line. - False. If an object is speeding up, its position vs time graph is not straight but curved, indicating acceleration.
- When a theory has been known for a long time, it becomes a law. - False. Theories do not become laws over time. Laws generally describe what happens, while theories explain why it happens, and both are validated through experiments and observation.