Within about 4 AU, all planets are rocky
Indicate whether the statement is true or false
TRUE
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When you measure distances to stars via parallax, it is better to use kilometers or Astronomical Units as the unit of distance
Indicate whether the statement is true or false
If all people, animals, trains and trucks all over the world began to walk or run towards the east (opposite the direction of Earth's spin), then
A) Earth would spin a bit faster. B) Earth would spin a bit slower. C) Earth's spin would not be affected at all.
What is the change in entropy of the lead when 2.0 kg of molten lead solidifies? [Data: Lv = 207. kcal/kg at 1744°C; Lf = 5.9 kcal/kg at 328.°C]
What will be an ideal response?
A 5.5 meter long Aluminum wire has resistance of 0.40 m?, ? = 2.82 × 10-8 ? ? m, ? = 4.29 × 10-3 C-1. Its conductivity is
A) 233. ? ? m. B) 3.55 × 107 ?-1 m-1. C) 2.5 × 103 ?-1 . D) 2.5 × 103 ? ? m. E) 2.33 × 107 ?-1 m-1.