The correct answer is: A. Temperature of the industrial lathe machine
Smart dust is a type of sensor that can be used to measure a variety of physical quantities, including temperature, pressure, humidity, and acceleration. It is made up of tiny, wireless devices that can be easily attached to objects or surfaces. Smart dust can be used to monitor a wide range of environments, including industrial settings, homes, and hospitals.
In the context of the question, smart dust can be used to measure the temperature of an industrial lathe machine. This is because smart dust is very sensitive to changes in temperature. It can also be used to measure other physical quantities, such as pressure, humidity, and acceleration.
The other options are incorrect because they are not physical quantities that can be measured by smart dust. Option B, heat inside a computer’s CPU, is a measure of energy. Option C, chemical in the soil, is a measure of composition. Option D, strength of a solid material, is a measure of force.
Smart dust is a powerful tool that can be used to monitor a wide range of environments. It is small, lightweight, and wireless, making it easy to deploy in a variety of settings. Smart dust can be used to collect data on a variety of physical quantities, making it a valuable tool for a variety of applications.