Transfer the pendulum bob quickly** from beaker A to beaker B to minimize heat loss to the surroundings during the transfer.

Here are two precautions to ensure accurate results: Transfer the pendulum bob quickly from beaker A to beaker B to minimize heat loss to the surroundings during the transfer. Stir the water in beaker B continuously to ensure uniform temperature distribution and complete heat exchange between the pendulum bob and the water, leading to an accurate final temperature reading. 3 done, 2 left today. You're making progress.