The speed of light is 300,000 km/s. How far is a light-year? Be sure to show all work clearly on your calculations.
What will be an ideal response?
Answer: 1 light-year
= (speed of light) × (1 yr)
= ×
= 9,460,000,000,000 km
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An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?
A) 17 s B) 0.058 s C) 4.0 s D) 0.25 s
What would be the greatest effect on the ideal gas law if there is a slight repulsive force between the molecules?
A) At low temperatures, the pressure would be greater than that predicted by the ideal gas law. B) At high temperatures, the pressure would be greater than that predicted by the ideal gas law. C) At low temperatures, the pressure would be less than that predicted by the ideal gas law. D) At high temperatures, the pressure would be less than that predicted by the ideal gas law. E) There is no effect.
How many Earth years does it take Pluto to orbit the Sun?
A. 248 B. 0.2 C. 0.5 D. 2012 E. 10