Compared to Jupiter, the element ________ is notably less common in Saturn's atmosphere, perhaps condensing to fall toward the core as rain
Fill in the blank(s) with correct word
helium
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A 90.0 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater. The volume of the seawater displaced by the scuba diver with tanks and equipment is
A. 0.0508 
B. 0.0575
C. 0.0667
D. 0.0708
E. 0.0878
Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. The edges of the two mirrors meet at a 30° angle. A light ray that approaches mirror 1 is parallel to mirror 2 . The angle of reflection of that ray from mirror 1 is
a. 0°. b. 30°. c. 60°. d. 90°. e. 120°.
The symbol for carbon is
a. Ca. b. Cr. c. Co. d. C.
A recent sunspot maximum occurred in 2013 . What is the year of the sunspot maximum that immediately follows the 2013 maximum if the solar cycle continues?
a. 2017 b. 2019 c. 2022 d. 2024 e. The last cycle started a Maunder minimum and the next maximum cannot be predicted.