Buoyancy: A waiter fills your water glass with ice water (containing many ice cubes) such that the liquid water is perfectly level with the rim of the glass. As the ice melts,
A. the liquid-water level remains flush with the rim of the glass.
B. the liquid water level rises, causing water to run down the outside of the glass.
C. the liquid-water level decreases.
Answer: A
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A walker starts at the origin at 1:00 PM and walks 3.0 km from the origin toward the WEST to point A. She arrives at point A at 2:30 PM. She then walks from point A 2.0 km toward the WEST to point B and arrives at point B at 3:45 PM. The walker's average velocity for the entire trip is
A. 1.8 km/hr toward the EAST. B. 1.8 km/hr toward the WEST. C. 1.3 km/hr toward the WEST. D. 1.3 km/hr toward the EAST. E. 0.36 km/hr toward the WEST.
Which star has the largest proper motion? Why?
What will be an ideal response?
A diatomic has a moment of inertia of 7.73 × 10-45 kg? m2. What is its rotational energy in the quantum state characterized by l = 2? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 87.1 µeV B) 27.0 µeV C) 72.2 µeV D) 587 µeV E) 22.7 µeV
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a. 2.31 m/s2 c. 4.63 m/s2 b. 2.78 m/s2 d. 5.55 m/s2