An iceberg is floating in the ocean with 10% of its volume extending above the ocean's surface. What can you say about the iceberg?
A. As it melts, a smaller fraction of its volume will extend above the surface
B. Its density is close to but smaller than the density of water
C. It displaces only 90% of its weight in water
D. Its weight is less than the water it displaces
Answer: B
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CP titanium alloys are primarily solid solution strengthened by the addition of the element _________.
Fill in the blank(s) with the appropriate word(s).
An airplane that flies at 100 km/h in a 100-km/h crosswind has a ground speed of
A) 0 km/h. B) 100 km/h. C) 141 km/h. D) 200 km/h.
A charge of 5.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm), and a second charge of ?2.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm). Determine the magnitude of the electric field 3.0 cm from the center of the two surfaces.
A. 30 N/C B. 50 N/C C. 40 N/C D. 20 N/C E. 70 N/C
A parallel-plate capacitor is charged by a battery and then the battery is removed and a dielectric of constant K is used to fill the gap between the plates. Inserting the dielectric changes the energy stored by a factor of
A) 1/K. B) K. C) 2. D) K - 1. E) 1 (no change).