Question 1 of 10 What are two ways in which ultrasound technology produces images?
O A. By using sound in frequencies that reflect off body tissues
B. By detecting the frequencies of emitted sound waves
C. By the absorption of sound waves in the body
O D. By measuring the time it takes for reflected sound waves to be
detected

The text compares alternating current with direct current. how are they different? a alternating current reverses direction in the electrical wiring. direct current flows in one direction only. b direct current reverses direction in the electrical wiring. alternating current flows in one direction only. c direct current is powered by solar energy. alternating current is powered by electrical energy. d alternating current does not move in the electrical wiring. direct current does move in the electrical wiring.