A student yells into a cave and hears an echo. What behavior of a wave produces the echo? A The sound wave is absorbed.

B The sound wave is dispersed.

C The sound wave is reflected.

D The sound wave is transmitted.

When lifting heavy loads off the ground, the majority of the weight should be lifted by which of the following? a. arms b. legs c. back d. stomach

A5-year-old boy suddenly begins coughing while eating peanuts. he is choking and gagging. when he is brought to the ed, but he is awake and is able to give his name. on physical examination, his vital signs are stable. on examination of the chest, inspiratory stridor and intercostal and suprasternal retractions are apparent. which of the following is the most appropriate initial step in management? - allow patient to clear foreign object by spontaneous coughing- clear oropharynx with multiple blind sweeps with finger- position patient and perform back blows- stand behind patient and perform abdominal thrusts- perform emergency tracheostomy and take to surgery

Bulimia nervosa cannot be prevented, but it can be treated if diagnosed early. true or false?