State and explain five precautions to be considered during the setup of the root pressure experiment.

The stem of the plant should be cut at least three to four centimeters above the surface level.
The stem should be tightly fixed into the glass capillary.
All connection should be made air-tight by using paraffin.
Initial and final readings should be carefully noted.

This is a time line from 685 to 978

1.989×10^30 kg is the weight of the sun.