Orion is visible on winter evenings but not summer evenings because of
A) the location of Earth in its orbit.
B) baseball on television.
C) interference from the full moon.
D) the precession of Earth's axis.
E) the tilt of Earth's axis.
A
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The Manicouagan reservoir near Quebec is an example of
A) a volcanic event. B) Earth's interaction with a comet's dust tail. C) cometary debris. D) a micrometeorite impact. E) a large meteorite impact.
In this figure a tuning fork is struck and creates disturbances in the surrounding air. Describe the motion of the molecules in the figure
a. Each molecule moves back and forth from the left to the right. b. The molecules start at the left and all eventually end up to the right. c. The molecules move back and forth from left to right, on average, but their random motion causes them also to move in any direction. d. The molecules move either back and forth from left to right on average, or up and down. e. The molecules move either back and forth from left to right on average, as well as in and out of the page.
O2 is an example of
A) a molecule only B) a compound only C) both a molecule and a compound D) a collection of isolated atoms
The image of x-ray emission uses different colors to represent different levels of brightness. The dark blue color represents the least bright x-ray emission. Which color represents the brightest x-ray emission?
What will be an ideal response?