Answer:
1. Calculating the Distance: The distance travelled by sound is directly proportional to the time taken. Therefore, if ultrasonic worked in such a way that it took 0.07 seconds for the waves to bounce back from an obstacle, the total distance it travelled would be double the distance between the obstacle and the sensor.
Distance travelled by the sound waves = (time taken × speed of sound) / 2
= (0.07 × 343) / 2
= 11.705 metres
The distance between the ultrasonic and the obstacle in centimeters would be 1170.5 centimeters.
2. Applications of ultrasonic sensors in our daily life:
(a) Car parking sensors: Car parking sensors use ultrasonic waves to detect the distance and position between the car and obstacles around it. The sensors help the driver to park the car safely and avoid collisions with other cars or objects.
(b) Range-measuring devices: Ultrasonic sensors can be used to measure distances in a wide range of applications, including in-home security alarms, traffic monitoring systems, and industrial automation systems.
(c) Medical imaging equipment: Ultrasound is commonly used as a non-invasive medical diagnostic tool to produce images of internal organs and fetal development. The ultrasound imaging equipment emits high-frequency sound waves that bounce off the body's tissues, producing images that can detect cysts, tumors, and other abnormalities.
Step-by-step explanation: