The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
Indicate whether the statement is true or false
F
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In Ptolemy's view of the universe, a planet moves on an epicycle whose center moves around the Earth on the deferent circle
a. Correct b. FALSE; Ptolemy put the Sun at the center. c. FALSE; The planet stays on the deferent circle. d. FALSE; The Earth is at the center of the epicycle. e. FALSE; Both c and d are correct.
The planet's orbital period is:
A) the time it takes it to rotate and have the same face toward us again. B) the time it takes to return to the same location in the sky, relative to the Sun. C) the time it takes for a satellite to orbit it. D) the time it takes for it to retrograde back to the same position as we pass it. E) the time its magnetic field takes to spin once.
The temperature coefficient of resistivity of platinum is 3.9 × 10-3/K°. If a platinum wire has a resistance of R at room temperature (23.°C), to what temperature must it be heated in order to double its resistance to 2R?
What will be an ideal response?
For which value of ? is the height of a projectile fired from ground level a maximum?
A) 30° above the horizontal B) 45° above the horizontal C) 55° above the horizontal D) 60° above the horizontal E) 90° above the horizontal