Final answer:
The question is about a physics lab demonstration involving a simple pendulum. The answer explains the factors and principles that affect the motion of the pendulum.
Step-by-step explanation:
The student is asking about a physics lab demonstration involving two identical iron globes. The globes are attached to cords of equal length, forming a simple pendulum system. The question likely pertains to the properties and behavior of pendulums.
To answer the question, the lab instructor needs to consider variables such as the mass of the globes, the length of the cords, and the effects of gravity and other forces.
By conducting experiments and analyzing the data, the instructor can observe the motion, period, and stability of the pendulum, providing insights into the physics principles at play.