A 33-week newborn is initiated on mechanical ventilation wit…

A 33-week newborn is initiated on mechanical ventilation with a time-cycled, pressure-limited ventilator. The following information is available: Peak pressure 28 cmH2O, Rate 55 b/min, Ti 0.5 sec, PEEP 3 cmH2O, flow 8 L/min, Fi02 55% Arterial blood gas results on the above settings are: pH 7.28 PaCO2 52 torr PaO2 65 torr HCO3 25 mEq/L On examination, the breath sounds are diminished with poor chest excursion. Which of the following would be the most appropriate action at this point?

A child is walking in a straight line, which we shall call t…

A child is walking in a straight line, which we shall call the x axis, with the positive direction to the right. The figure below shows this child’s velocity as a function of time.      Which of the following statements about the child’s motion must be true?   1. Its acceleration is increasing. 2. Its speed is increasing from a to b. 3. Its speed is decreasing from a to b and increasing from b to c. 4. It is moving to the left between a and c. 5. It is moving to the left between a and b and to the right between b and c.