What observational evidence suggests that Uranus was struck by a large planetesimal early in its formation?
A. Uranus's moon Miranda shows a patchwork surface, suggesting a collision in its past.
B. Uranus's rotational axis is tipped over.
C. Uranus orbits the Sun in the opposite direction as the other planets.
D. Astronomers have identified a large impact crater on the surface of Uranus.
Answer: B
You might also like to view...
Burl and Paul have a total weight of 1300 N. The tensions in the supporting ropes that support their scaffold add to 1700 N. The weight of the scaffold itself must be
A) 300 N. B) 400 N. C) 500 N. D) 600 N.
Kepler's first law of planetary motion states "The orbits of the planets are _____ with the Sun at one focus."
a. spheres b. ellipses c. circular d. rigid e. random
Fluid Flow: Water, which we can treat as ideal and incompressible, flows at 12 m/s in a horizontal pipe with a pressure of 3.0 × 104 Pa. If the pipe widens to twice its original radius, what is the pressure in the wider section?
A. 3.0 × 104 Pa B. 4.9 × 104 Pa C. 7.4 × 104 Pa D. 9.8 × 104 Pa
A proton (+1.6 × 10^?19 C) moves 20 cm on a path in the direction of a uniform electric field of strength 2.4 N/C. How much work is done on the proton by the electrical field?
a. 7.7E–20 J b. ?7.7E–20 J c. 1.8E–19 J d. ?8.6E–20 J e. zero