The formula for iron(II) sulfate is
a. Fe2SO4.
b. Fe2(SO4)2.
c. Fe(SO4)2.
d. FeSO4.
d
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Young's Modulus: A vertical 30-cm steel rod, 1.0 cm in diameter, supports a 300-kg mass. What is the change in length of the rod caused by this mass? Young's modulus for steel is 2.0 × 1011 N/m2.
A. 5.6 × 10-5 m B. 6.5 × 10-5 m C. 5.6 × 10-6 m D. 6.5 × 10-6 m E. 6.5 × 10-4 m
Explain why observations suggest the presence of dark energy in the universe.?
What will be an ideal response?
Cal is viewing the Moon with his new telescope, using a 10-mm focal length eyepiece. For greater detail, he wishes to double the magnification of his telescope
An eyepiece having which one of the following characteristics will accomplish this for him? A) 40 diopters B) 8 mm C) 12 mm D) 200 diopters E) 5 diopters
Water from streams in northern Utah flow to
A) the Atlantic Ocean. B) the Gulf of Mexico. C) the Pacific Ocean. D) Colorado.