Answer: a sealed container. He could use several methods to observe the progress:
1. Pressure gauge: Jorge could attach a pressure gauge to the container and track the pressure changes over time. As the vacuum pump removes air molecules from the container, the pressure inside the container will decrease. Jorge can use the pressure gauge to monitor the pressure changes and estimate the level of vacuum achieved.
2. Flow rate meter: Another way that Jorge could observe the progress of his vacuum pump is by measuring the pump's flow rate. Jorge could install a flow rate meter in the pumping system and use it to measure the volume of air that the pump is removing from the container over time. This would give him an idea of how quickly the pump is evacuating the container.
3. Visual inspection: Jorge could also observe the progress of his vacuum pump by visually inspecting the container. As air molecules are removed from the container, there will be fewer and fewer visible signs of air, such as moisture or bubbles. By observing these changes, Jorge can estimate the level of vacuum achieved.
4. Time-lapse photography: Finally, Jorge could set up a time-lapse camera to capture images of the container over time. By reviewing the images, Jorge can see the changes in the container as air molecules are removed and estimate the level of vacuum achieved.