Final answer:
To obtain another value of the square, adjust the length of the pendulum. Decreasing the length decreases the square value, while increasing the length increases the square value.
Step-by-step explanation:
To obtain another value of the square, you can adjust the length of the pendulum. The Distance measured to the center of the bulb is 100 cm. If you decrease the length of the pendulum, the square value will decrease. If you increase the length of the pendulum, the square value will increase.