One Technique That Astronomers Are Now Using to Increase the Amount

question 264

Multiple Choice

One technique that astronomers are now using to increase the amount of detail that can be recorded with telescopes is

• A) spinning huge tubs of mercury, thus producing very large parabolic surfaces at relatively low cost.
• B) antireflective coatings, where the mirror is coated with a substance such as calcium fluorite to reduce the amount of reflected light.
• C) increased size, with mirrors up to 10 m in diameter (far larger than at earlier times), thereby producing greater intrinsic angular resolution.
• D) adaptive optics, where the tilt and shape of mirrors in the telescope are changed many times per second to compensate for atmospheric turbulence.

Explain the role and effects of medications used in pediatric renal disorders.

Understand the principles of preventing urinary tract infections in children.

Describe the advantages and considerations of dialysis and renal transplantation in pediatric patients.

Recognize the physical and emotional impacts of chronic renal disorders and their treatments on children.

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Definitions:

Michael Reaction

A conjugate 1,4-addition reaction of a carbon nucleophile to an α,β-unsaturated carbonyl compound.

α,β-unsaturated Carbonyl

An organic compound with a double bond between the alpha and beta carbon atoms adjacent to a carbonyl group, participating in various chemical reactions.

PhCOCH

A general formula shorthand for compounds where a benzene ring (indicated by Ph, standing for phenyl) is attached to a carbonyl group (CO) and an additional unspecified group (CH), leading to a variety of possible chemical structures.

Cyclopentanecarboxylic Acid

A cycloalkane derived carboxylic acid, with the carboxyl group attached to a five-membered ring.