dendrometer
The instrument "Metalic tap" is generally used for length measurement in India
usually a ruler is used for measurement of length! Sabrina L. wrote this and i rule YEAHHHHH
a dendrometer is used to measure trees.
Pyrometer
True
which instruments used for the measurement of heat
Spectrometer
A stream gauge is the instrument which is commonly used for the measurement of velocity stream.
When are air velocity measurement used
A rain gauge ( an instrument used for the measurement of rain ) is not kept in open space away from trees and buildings so as to prevent the rain water collected in the buildings and trees from falling into the rain gauge.
there are many instruments used to measure length depending upon the size of object , Ruler is Metric instrument used to measure length. Screw gauge is also used as an instrument used to measure length in mm.
Thermometers are an instrument used to measure temperatures.