Final answer:
The student's question is related to the standard penetration test in Engineering at the College level, but the information provided is incomplete and not directly relevant to SPT results for geotechnical engineering. The SPT assesses soil conditions at a depth of 20 feet in medium sand for foundational engineering purposes.
Step-by-step explanation:
The student's question seems to pertain to the field of Engineering, more specifically geotechnical engineering. The standard penetration test (SPT) is a common in situ testing method used to determine the geotechnical engineering properties of subsurface soils. It is widely used during the site investigation phase of construction projects to assess soil conditions at varying depths, typically for foundation design purposes.
However, the information given in the question is incomplete and does not allow for a comprehensive answer. A standard penetration test involves driving a hollow sampler into the ground, and the number of blows needed to advance the sampler a certain distance (usually 30 cm) in the soil is recorded as the 'N-value' or 'blow count.' This blow count is then used to estimate the density and strength of the soil at the tested depth.
In a typical SPT scenario at a depth of 20 feet in medium sand, an engineer or geotechnical specialist would expect to obtain blow count data that would help determine the soil's characteristics at that specific depth. The information provided as a reference, however, does not seem relevant to an SPT result or process, as those values could pertain to different measurements and disciplines such as physics or ophthalmology. There seems to be a confusion in the presented data that require clarification to provide an accurate and helpful answer related to the context of an SPT at a medium sand site.