Refer to the figure above showing the abundance of elements in the galaxy relative to hydrogen. What is the general trend in elemental abundance?
A) Elements with more protons are less abundant.
B) Elements with more protons are more abundant.
C) Elements heavier than iron do not exist.
D) Elements heavier than iron are relatively abundant.
E) There is no apparent trend in the abundance of elements.
A) Elements with more protons are less abundant.
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Parallel Wires: Two parallel straight wires are 7.0 cm apart and 50 m long. Each one carries a 18-A current in the same direction. One wire is securely anchored, and the other is attached in the center to a movable cart. If the force needed to move the wire when it is not attached to the cart is negligible, with what magnitude force does the wire pull on the cart? (?0 = 4? × 10-7 T ? m/A)
A. 46 mN B. 37 mN C. 66 mN D. 93 mN
How did Galileo's observations of Venus disprove the Ptolemaic model?
What will be an ideal response?
The best determination of the Hubble constant using Cepheid variables found in distant galaxies by the Hubble telescope suggests
a. that the Hubble constant is about 0.07 km/sec/Mpc. b. that the Hubble constant is about 7 km/sec/Mpc. c. that the Hubble constant is about 70 km/sec/Mpc. d. that the Hubble constant is about 700 km/sec/Mpc.
The Sun orbits the center of the galaxy about once every ____
a. 200,000 years b. 2,000,000 years c. 20,000,000 years d. 200,000,000 years e. 2,000,000,000 years