What is the enthalpy of activation for viscous flow in the soda-lime glass shown in Figure 9.3, in the temperature range from 700 to 800 K?
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Which of the two identical pyramids is exerting the most pressure on the floor?
1) A 2) B 3) both the same The reason for this is that 4) they both have the same weight. 5) the heaviest part of the pyramid is closer to the floor. 6) the weight is distributed over a smaller area. 7) the weight is distributed over a larger area.
Based on what the nebular theory tells us about the formation of our own solar system, what does the theory predict for the possibility of other planetary systems?
a. Planetary systems should be common. b. Other planetary systems should be identical to our own. c. Most stars should have one or two planets, but not more. d. Planetary systems should be very rare.
The "wispy terrain" on Rhea was revealed by the Cassini spacecraft to be:
A) ice cliffs created by tectonic fractures. B) water ice flows from past impacts that cracked its icy surface. C) the icy ash of water volcanoes. D) "maria" created during the period of high impacts. E) water ice flows from geyser-like activity.
A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of initial magnitude 0.40 T
The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0 s. If the resistance of the coil is 16 ?, at what rate is power generated in the coil? A) 5.0 W B) 10 W C) 15 W D) 20 W E) 25 W