What are Kepler's three laws of planetary motion?
What will be an ideal response?
I. The orbits of the planets are ellipses with the Sun at one focus.
II. A line from a planet to the Sun sweeps over equal areas in equal intervals of time.
III. A planet's orbital period squared is proportional to its average distance from the sun cubed (can include actual equation)
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Star A has an apparent visual magnitude of 6.3 and star B has an apparent visual magnitude of 5.3 . Star A is _________ times (fainter or brighter) than star B
Fill in the blank(s) with correct word
Compared the Earth, the universe is
A) about the same age B) just slightly older C) much older D) much younger
What was the Maunder Minimum?
What will be an ideal response?
A farmer is using a tank of 20°C nitrogen pressurized to 540 kPa absolute. It exits the tank out a hose. The hose snaps and the farmer is hit with the expanding nitrogen. Air is primarily nitrogen so assuming it is air flowing with no losses, the temperature of the exiting nitrogen is nearest:
(A) ?120°C (B) ?90°C (C) ?70°C (D) ?50°C