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Suppose a train sounding its horn is moving at 30.0 m/s in still air on a day when the speed of sound is 340.0 m/s. As the train passes the platform, on which you stand (moving away from you), you hear it with a frequency of 167 Hz. Which frequency does an observer on the train hear?

  A mass m = 8.0 kg is attached to a spring and allowed to hang in the Earth’s gravitational field. The spring stretches 2.5 cm before it reaches its equilibrium position (where the spring force balances gravity). If allowed to oscillate, what would be its frequency?  

A mass m = 7.0 kg is attached to a spring and allowed to hang in the Earth’s gravitational field. The spring stretches 4.4 cm before it reaches its equilibrium position (where the spring force balances gravity). If allowed to oscillate, what would be its period?

A complete ventilatory cycle or breath consists of which of the following phases? 1. expiration2. initiation of inspiration3. inspiration4. end of inspiration

What is the average distance from the tip of a properly positioned oral endotracheal tube to the incisors of an adult man?

What general condition requires airway management? 1.      airway compromise2.      respiratory failure3.      need to protect the airway

Which of the following define successful application of noninvasive ventilation (NIV)? overall improvement of patient’s blood gas normal blood gas PaO2 increased PaCO2 decreased

Which of the following indicate severely impaired oxygenation requiring high FIO2s and positive end-expiratory pressure? 1. PAO2–PaO2 greater than 350 mm Hg on 100% O22. VC less than 10 ml/kg3. PaO2/FIO2 less than 200

Which of the following restrictive thoracic diseases are successfully managed with noninvasive ventilation (NIV)? 1. postpolio syndrome2. neuromuscular disease3. spinal cord injuries4. severe kyphoscoliosis

Which of the following injuries are NOT seen with tracheostomy tubes? 1.      tracheomalacia2.      tracheal stenosis3.      glottic edema4.      vocal cord granulomas