At the Sun Dagger in New Mexico, a dagger-shaped beam of sunlight pierces a spiral
A) every day at noon.
B) at noon on the summer solstice.
C) at sunset on the spring equinox.
D) at noon on the day of full Moon each month.
E) during the totality of a total solar eclipse.
B
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Which two rover missions provided detailed information about the surface of Mars?
a. Phoenix and Odyssey b. Spirit and Opportunity c. Mars Express and Magellan d. Magellan and Terra e. Voyager and Apollo
When a drawn bow of potential energy 40 J is fired, the arrow will ideally have a kinetic energy
A) less than 40 J. B) more than 40 J. C) of 40 J.
A diffraction grating has 6000. lines per centimeter ruled on it
What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 550. nm?
Two fixed navigation beacons mark the approach lane to a star. The beacons are in line with the star and are 49 Mm apart. A spaceship approaches the star with a relative velocity of 0.50 c and passes the beacons
The passage of the ship between the beacons is timed by an observer on the ship. The time interval of the passage is closest to: A) 280 ms B) 330 ms C) 380 ms D) 170 ms E) 110 ms