When the overall image appears flat and gray, or all anatomic structures are not penetrated, this refers to a __________ issue

Which type of plastic construction materials can be reheated, melted, and remolded into new shapes?

A. Thermoresins B. Thermosetting C. Thermoplastics D. Thermopolymers

The vibration created by percussion penetrates the lung to approximately what depth?

a. 1 to 2 cm b. 3 to 5 cm c. 5 to 7 cm d. 8 to 10 cm