In terms of composition,
A) the terrestrials are more like the Sun, since they formed close to it.
B) the jovian planets are made only of ice, and the terrestrials only of rock.
C) the Sun is unique, made of nothing but hydrogen and helium.
D) the jovian planets are more like the Sun than are the terrestrials.
E) all planets are condensed from the same nebula and have similar compositions.
D
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As shown in the diagram, you've just thrown a baseball toward Al at 100 km/hr, while he is moving away from you to the right at 90 km/hr. According to Al, what is the baseball doing?
A) traveling to the right at 10 km/hr B) traveling to the right at 100 km/hr C) staying stationary D) traveling to the right at 190 km/hr
Room temperature is approximately
A) 68. K. B) 300.°F. C) 300. K. D) 68.°C. E) -68.°F.
If, instead of the correct formula for kinetic energy, we carelessly use the classical expression for kinetic energy for a particle moving at half the speed of light, by what magnitude percent will our calculation be in error? (c = 3.0 × 108 m/s)
A) 24% B) 19% C) 27% D) 7% E) 1%
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = ?1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
A. 60 kJ B. 45 kJ C. 75 kJ D. 90 kJ E. 230 kJ