why sensors are used to measure temperature , humidity wind speed & wind directions?

Answer 1

To predict Weather.

Answer 2

A very simple set of prognostic equations are given with du/dt, dv/dt, and dw/dt are the x,y, and z components of the velocity of the wind which are expressed by the equations of motion (on the right hand side of the equation). Two other equations are dr/dt and dp/dt where r is the density of the air and p is the pressure of the air column. The first is found with the equation of continuity and the second from the law of conservation of energy. Therefore with the observed three dimensional wind vector, the calculated density which depends on the observed temperature, and the observed pressure, these equations can be integrated to determine the values of these parameters at some point in the future. If we add another equation for atmospheric moisture we will need the observed humidity as well.

Answer 3

Temperature, pressure and humidity are measured in instruments attached to balloons. The value for each reading is transmitted in turn at a different frequency. These are the things the balloon is used to measure.

Answer 4

In remote areas where manual observations can not be taken regularly,sensors can be used to collect the wearther data and transmit the same to a central place.