Language does not simply mirror reality, it helps create our sense of reality by giving meaning to events. Rather than thinking of ideas in coming up with words to express them, we usually think in words. Inaccurate use of language can harm speakersâ credibility by making them sound less intelligent or ill informed.
Ultrasound is high frequency sound wave with frequencies of 20 kHz or higher. (Fig. 1) Ultrasound has many practical applications. It is often used in cameras to measure distance and used in ships to measure sea depth.However, more interesting applications of ultrasound are in the field of medicine. Using an array of piezoelectric transducers, ultrasound can be used to image the internal organs.Fig. 1) Ultrasound has many practical applications. It is often used in cameras to measure distance and used in ships to measure sea depth. However, more interesting applications of ultrasound are in the field of medicine.
The distance can be measured at regular time intervals, as the trolley moves, and a graph plotted. This type of measurement is best done by a computer where the rapid timings and calculations can be done quickly and results displayed on the monitor.Other techniques are available for detecting distance and speed. number of different techniques can be used for recording the way distance changes over time. One method commonly used in the school laboratory is the ultrasonic motion sensorSensors used in electronics produce a change in their resistance when some feature of their surrounding environment changes.