The diagram below shows three approximate locations of the sun along the western horizon. Which number indicates the location of the sun at sunset on June 21 for an observer at a latitude of 37° N?
a. 1
b. 2
c. 3
d. The sun will not rise for an observer in the northern hemisphere.
e. The sun will not set on June 21 at this latitude.
C
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Captain Ray, on the Galactic Explorer, sets off bright signal lights at the two ends of his spaceship so that they are seen as flashing simultaneously by General Kay, who is watch the ship go by. General Kay concludes that she was next to the midpoint of the ship at the instant when the lights flashed in her reference frame. This can only happen if Captain Ray, at the center of the Galactic
Explorer, a. sees the lights flash simultaneously in his coordinate system. b. sees the bow (front) light flash before the aft (rear) light. c. sees the aft (rear) light flash before the bow(front light. d. can calculate that the light flashes reach General Kay so that the flash from the bow light reaches her before the flash from the aft light. e. can calculate that the light flashes reach General Kay so that the flash from the aft light reaches her before the flash from the bow light.
The color force is carried by gluons but gluons do not have color charge themselves
Indicate whether the statement is true or false
Which physical unit is the SI acceleration of gravity?
A) 40 km, SW B) 32 ft/s2 C) 9.8 m/s2 D) 186,000 mi E) -120 mi/s
What would happen to Earth's temperature if you painted the entire surface of the Earth black?
A) Its average temperature would go up. B) Its average temperature would go down. C) Its temperature would not change.