The diagram shown illustrates the location of the Solar System's eight planets and three large dwarf planets. Sort each object according to its basic composition.
What will be an ideal response?
Gaseous: Jupiter, Saturn, Uranus, Neptune
Rocky: Mercury, Venus, Earth, Mars, Ceres
Rocky/Ice mixture: Pluto, Eris
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The Huygens probe took numerous pictures as it descended to the surface of Saturn's moon Titan in 2005. What did the pictures show?
A) features or erosion, including what appeared to be dry river valleys and lakebeds B) primitive life forms C) a densely cratered surface D) lava flows of molten basalt
Suppose sand is leaking from an unpowered but moving railroad car. Since the sand is moving forward along with the car as it leaks out, it carries kinetic energy out of the car. This mass transfer will
A. Cause the car’s speed to increase. B. Cause the car’s speed to decrease. C. Have no effect on the car’s speed.
Consider a series circuit in which the capacitive reactance equals the inductive reactance. What is the phase angle between current and voltage for this circuit?
A) 0° B) +180° C) +90° D) -90° E) -180°
The free-body diagram below represents a 1500-kg car sitting on a 3000-kg bridge supported at its far ends. The car's position is three quarters of the length L from the left end of the bridge. Identify the one error in the torque equation below:
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