Dr. Smith believes that the Hubble constant is H0 = 70 km/s/Mpc. Dr. Jones believes it is H0 = 50 km/s/Mpc. Which statement below automatically follows?
A) Dr. Smith believes that the universe is expanding, but Dr. Jones does not.
B) Dr. Smith believes that the Andromeda Galaxy (a member of our Local Group) is moving away from us at a faster speed than Dr. Jones believes.
C) Dr. Smith believes that the universe is older than Dr. Jones believes.
D) Dr. Smith believes that the universe is younger than Dr. Jones believes.
E) Dr. Smith believes that the universe will someday stop expanding, while Dr. Jones believes it will expand forever.
D
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Which of the half-reactions below would be complementary and balance the following half-reaction?
Zn+2 ? Zn A) Cu ? Cu+2 B) K+ ? K C) 2 Cu ? 2 Cu+2 D) 2 K+ ? 2 K E) Cl2 ? 2 Cl-
The temperature in a room is 77°F. What is the corresponding temperature in the Celsius scale?
A) 81°C B) 77°C C) 43°C D) 25°C E) 18°C
A meteor is
A) an irregularly shaped body, mostly found orbiting between Mars and Jupiter. B) a chunk of space debris orbiting the Earth. C) a chunk of space debris that has struck the ground. D) an icy body with a long tail extending from it. E) a streak of light in the atmosphere.
On bare feet, a tile floor feels colder than a rug because the tile has a greater ______________
Fill in the blank(s) with correct word