The most direct way to measure the angle of a hill would be to use a clinomiter. You could also use a level and staff.
What instrument do we use to measure the electrical and mechanical vibrations
The instrument used to measure humidity is called a hygrometer.
The instrument used to measure humidity is called a hygrometer.
The barometer is the instrument that is used to measure the air pressure.
seismographs
Protractor...
seismographs
thermostat
use a protractor to measure angles
The ceilometer instrument.
Anemometer is the instrument used to measure wind speed and direction.
A tape measure.