Question

I'm on a timer

Answer 1

Answer:

The generated sound wave will not be able to reflect off of the object.

Explanation:

Ultrasound may be defined as the sound waves that has the frequency range larger than 20,000 Hz. This sound range is inaudible to human ears but can be detected by the animals like bats.

Ultrasound is used in the medical application as well. The kidney stones can be detected by using the ultrasound. The rays can be detected back if there is any chances of hurdles or possibility of stones in the kidney. If the kidney is normal no ultrasound waves will be deflected back.

Thus, the correct answer is option (A).

Answer 2

If the machine is working properly then that rules out 2, 3 and 4 as they are all technical problems and therefore it must be A there waves don't reflect of the stone properly and therefore no image is formed

Hope that helps