Which of the following processes is consistent with the law of conservation of four-momentum? a) A particle moving eastward collides with and sticks to an identical particle at rest. The resulting single particle remains at rest but is more massive than the sum of the original particles’ masses.
A. C
B. F
B. F
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The largest Jovian moons have sizes comparable to Mercury. Why do they have an icy composition compared to Mercury's rocky composition?
A) They are captured comets. B) They formed from hydrogen compounds expelled by the jovian planets. C) They experienced many more comet impacts during the heavy bombardment. D) They formed beyond the frost line, where ices were more abundant than metals and rock.
A spherical particle of density 
and 2.00-mm radius is located at the same distance from the Sun as the Earth (RSE = 1.5 × 1011 m, G = 6.67 × 10-11 Nm2/kg2, S? = 1365 W/m2?, M S = 1.99 × 1030 kg) . If the particle absorbs 100 percent of the sunlight reaching it, the ratio of the force exerted by the solar radiation to the force of gravity exerted on the particle by the Sun is
A. 5.8 × 10?5. B. 0.58. C. 1.0. D. 1.7. E. 1.7 × 104.
Current flows through a resistor
A) with no direction since it is not a vector. B) from any potential to any different potential. C) from high potential to low potential. D) from low potential to high potential. E) cannot be determined
Resistors of values 7 ?, 15 ?, and 25 ? are connected in parallel across a fresh battery. Which resistor dissipates the greatest power?
a. the 7-? resistor b. the 15-? resistor c. the 25-? resistor d. All dissipate the same power when in parallel.