05- An earth station is receiving a signal from a space research satellite on a frequency of 11GHZ. The satellite is at range of 16000 km and its transmitter supplies 100w into an antenna having a gain of 35d8. Assuming free-space propagation, Calculate a) The power density in W/m b) if the antenna of the earth station has a gain of 35dB too, what is the signal power received? c) Area each antenna?

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Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors.  The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.