Name three differences between terrestrials and jovian planets
What will be an ideal response?
Terrestrials are smaller, denser, located closer to the Sun, spin slower, have fewer satellites, no rings, thinner atmospheres.
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Which of the following explains why, a million years from now, Alpha Centauri will no longer be the nearest star system to our own?
A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.
What is the main factor that drives Darwinian evolution?
A) the competition for finite resources B) the need to have sex C) the ability of an organism to harness the energy of the Sun D) the size of an organism
The Chandrasekhar limit is
A) the upper-mass limit for a white dwarf. B) the temperature at which hydrogen fusion starts. C) the point at which a planetary nebula forms. D) the temperature at which helium fusion starts. E) the lower-mass limit for a Type II supernova.
Free Fall: A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?
A. 160 m B. 330 m C. 320 m D. 410 m E. 490 m