When using a hydraulic press it is important to: Select one:
of
a. ensure safety devices are present and working.
O
b. remove any pins or locks from the press assembly.
c. only press parts in line with the hydraulic ram.
O
d. none of the above.

Measuring the distance between two trees, you measure that there are 75.5 steps between the two trees. give an estimate of the unit of measurement of one step in meters and give an estimate of what you think its uncertainty is. give the distance that separates the trees in meters as well as feet/inches and round to the correct amount of significant digits. what would you say are the uncertainties for the these two distances