Based on their spin, all particles can be classified as either
A) fermions or bosons.
B) quarks or leptons.
C) matter or antimatter.
D) color, flavor, or mass.
A) fermions or bosons.
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A 1500-kg car traveling at 90 km/h toward the east suddenly collides with a 3000-kg car traveling at 60 km/h toward the south. The two cars stick together after the collision. What is the direction of motion of the cars after collision?
A) 53.1° S of E B) 53.1° E of S C) 36.9° E of S D) 36.9° S of E
An ice cube at 0°C is placed in a very large bathtub filled with water at 30°C and allowed to melt, causing no appreciable change in the temperature of the bath water. Which one of the following statements is true?
A) The entropy gained by the ice cube is equal to the entropy lost by the water. B) The entropy lost by the ice cube is equal to the entropy gained by the water. C) The net entropy change of the system (ice plus water) is zero because no heat was added to the system. D) The entropy of the system (ice plus water) increases because the process is irreversible. E) The entropy of the water does not change because its temperature did not change.
A mirage occurs for road surfaces that are most often
A) hot. B) cold. C) wet. D) hard. E) snowy.
Conduction: In an experiment to measure the thermal conductivity of a certain material, a slab of material 10.0 mm thick separates a steam chamber from a block of ice with a square cross-section with dimensions 8.00 cm × 8.00 cm. After 5.00 min of running the experiment, 64.0 g of ice have melted. What is the thermal conductivity of this material? The latent heat of fusion of water is 33.5 × 104 J/kg, the latent heat of vaporization of water is 2.256 × 106 J/kg, and both the ice and water are under 1.00 atm of pressure.
A. 0.130 W/m ? K B. 0.250 W/m ? K C. 0.440 W/m ? K D. 0.620 W/m ? K E. 1.12 W/m ? K