Which of the following is a characteristic that Pluto shares with the Jovian planets?
A. It is mostly composed of hydrogen and helium.
B. It has a ring system.
C. It has a thick atmosphere.
D. All of these choices are correct.
E. None of these choices is correct.
Answer: E
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The gravitational force that the Sun exerts on Earth is much larger than the gravitational force that Earth exerts on the Sun
Indicate whether the statement is true or false
In what way is Mercury's core unusual?
What will be an ideal response?
Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth. Hans is holding a pencil at an angle of 30° with the direction of travel, as seen by Hans
What angle does the pencil make with the direction of travel, as seen by Brian on Earth? A) 29° B) 30° C) 31° D) 33° E) 90°
A spaceship from another galaxy passes over the solar system directly above a radial line from the sun to the Earth. (We measure that distance to be 1.5 × 10^11 m.) On Earth, the spaceship is observed to be traveling at a speed of 0.80 c, for which ? = 5/3 . As measured on Earth it takes the spaceship 625 seconds to travel from the sun to Earth. When a scientist in the spaceship measures the
Earth-sun distance and the time it takes her to travel that distance, she finds the results are respectively a. 9.0 × 10^10 m; 375 s. b. 9.0 × 10^10 m; 625 s. c. 1.5 × 10^11 m; 625 s. d. 2.5 × 10^11 m; 625 s. e. 2.5 × 10^11 m; 1042 s.