Why do the orbits of the planets all lie in nearly the same plane?
a) Collisions between planetesimals destroyed all planetsthat would have been elsewhere.
b) The Sun's gravity forced them into these orbits.
c) The early solar nebula flattened into a disk.
d) The angular momentum of the solar system was kept to a minimum this way.
e) This happened purely by chance.
Ans: c) The early solar nebula flattened into a disk.
You might also like to view...
The smallest high tides occur when the Moon phase is
A) first or third quarter. B) new. C) full. D) waxing or waning crescent. E) waxing or waning gibbous.
Besides the aerosol sprays, another source of chlorofluorocarbons is
A) fossil fuels. B) biomass fuels. C) Both of the above. D) refrigerants. E) jet exhaust.
Define instantaneous velocity
A body of water at 80ºF has still air at 80ºF, 14.7 psia, and 10% relative humidity above it. Estimate the evaporation rate of water into the air when the air has 20% relative humidity 3 feet above the water surface.
What will be an ideal response?