One smoot is defined to be equal to five feet and seven inches (1.70 m), the height of Oliver R. Smoot. 

In 1958, Oliver Smoot was used to measure the length of the Harvard Bridge. Smoot lay down on the bridge and his friends rolled him head over heels the entire length of the bridge. They painted a mark on the bridge every ten smoots. 

The process was repeated until the entire length of the bridge had been measured. 

The bridge’s length was measured to be 364.4 smoots plus or minus one ear.

What is the SI unit of length?

Which of the following instruments can be used to measure Oliver Smoot’s height?

It took 2 hours to measure the entire length of the Harvard Bridge. Which of the following represents 2 hours in SI units?

Oliver Smoot and his friends measured the bridge at around 10 PM. The Harvard bridge is in Boston. When asked if it was a cold night, he replied saying “it was very nice for Boston in October”.

Singapore is a lot warmer than Boston which makes it difficult to imagine how hot or cold it was that day.

What is the SI unit for temperature?

The length of the bridge was measured to be 364.4 smoots plus or minus one ear.

When asked why the “ear” was included, Oliver Smoot said that he and his friends wanted to have some allowance for the possibility that they had made some errors.

Assume that Oliver Smoot’s head was placed slightly ahead of the actual boundary of the bridge. What type of error would this result in?