Scientific thinking is
A) based on everyday ideas of observation and trial-and-error experiments.
B) completely different from any other type of thinking.
C) a difficult process that only a handful of people can do well.
D) an ancient mode of thinking first invented in Egypt.
A
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The flattest of the elliptical galaxies are class
A) E0. B) SBO. C) E7. D) E9. E) SBF.
Which of the following may not be possible to determine with the powder method of x-ray diffraction?
(a) The presence of a material in a specimen with a known crystal structure (b) The unit cell lattice parameters of a known crystal structure (c) If a cubic crystal is simple, body-centered, or face-centered (d) A previously unknown complex crystal structure
In the deep ocean trenches, there are hydrothermal vents, which discharge very hot water. In one such vent, the temperature of the water is 300°C. Why does this water not boil?
What will be an ideal response?
A long solenoid (n = 1200 turns/m, radius = 2.0 cm) has a current of a 0.30 A in its winding. A long wire carrying a current of 20 A is parallel to and 1.0 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the solenoid?
A. 0.60 mT B. 0.85 mT C. 52 ?T D. 0.40 mT E. 0.75 mT