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The law of conservation of ______ tells us that matter is not created or destroyed in a chemical reaction.   *answer in all lowercase

Infants as young as 2 months of age prefer to look at attractive faces rather than unattractive faces.

The energy of light is related to:

Brenda is in the second stage of labor. What is the BEST predictor of whether her doctor will perform an episiotomy?

Which of the following electron configurations is correct for oxygen (O, Z = 8)?

A clinician selects the wrong instrument to conduct a measurement. What type of error is this considered? (Select the best fit.)

A photon of light has a wavelength of 450 nm. Calculate its energy in joules.   E=hcλE = \frac{hc}{\lambda} h=6.626×10−34J⋅sh = 6.626 \times 10^{-34} J·s c=3.00×108m/sc = 3.00 \times 10^8 m/s *must show all your work including how units cancel out. Final answer should be in correct significant figures and include proper unit. 

Which of the following are potential defenses the nurse or facility could use in a malpractice case? Select all that apply.

Preterm babies spend more of their time in rapid eye movement (REM) sleep than do full-term babies.

Approximately one baby out of seven born one month early will suffer respiratory distress syndrome.