A newborn is diagnosed with tetralogy of Fallot (TOF). During morning assessment, the infant suddenly becomes cyanotic, tachypneic, and irritable after a routine blood draw. Oxygen saturation drops to 70% despite supplemental oxygen. Which action should the nurse take first?

A school-age child with a known diagnosis of Von Willebrand disease is admitted after falling off a bike and sustaining a deep laceration to the leg. The bleeding is controlled with direct pressure. Which provider order should the nurse anticipate to prevent further complications?

A 12-year-old with sickle cell disease presents to the ED with chest pain, cough, fever (38.9°C / 102°F), and increasing shortness of breath. The nurse reviews the results: SpO₂: 90% on room air CBC: Hgb 7.2 g/dL (↓), Reticulocyte count ↑, WBC 15,000/mm³ (↑) Chest X-ray: New left lower lobe infiltrate Which provider order should the nurse implement first?

Double-slit interference: Coherent monochromatic light of wavelength 632.8 nm passes through a pair of thin parallel slits. The figure shows the central portion of the pattern of bright fringes viewed on a screen 1.40 m beyond the slits. What is the distance between the two slits?

Double-slit interference: Light of wavelength 519 nm passes through two slits. In the interference pattern on a screen 4.6 m away, adjacent bright fringes are separated by  5.2 mm in the general vicinity of the center of the pattern. What is the separation of the two slits?

Double-slit interference: Light from a 600 nm source goes through two slits 0.080 mm apart. What is the angular separation of the two first order maxima occurring on a screen 2.0 m from the slits?

Diffraction grating: Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines.  The second-order maximum is seen at 32.5°.  What is the wavelength of the incident light?

Single-slit diffraction: A slit of width 0.010 mm has light of frequency 5.0 × 1014 Hz passing through it onto a screen 60 cm away. How wide is the central maximum? (c = 3.00 × 108 m/s)

Diffraction grating: A diffraction grating has rulings of 890 lines/mm. When white light is incident normally on the grating, what is the longest wavelength that forms an intensity maximum in the fifth order?

Diffraction grating: When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4°.  What is the wavelength of the light?