15 points which of the following pairs of objects could not have a magnetic force acting between them? (4 points) select one: a. two metal spoons b. a piece of iron and a magnet c. two magnets d. a block of wood and a metal spoon

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.