Unlike Bohr, Schrödinger viewed electrons as
A) fixed in position.
B) traveling in circles.
C) tiny bullets.
D) waves.
Answer: D
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Which of the following contains the most energy per gram?
A. TNT B. chocolate chip cookies C. battery D. uranium
A future news release might report that a new planet has been found around a star very similar to our sun. This newly discovered planet is claimed to have a mass 40 times that of Earth and is located nearly 25 AU from the star it orbits. Which of the following would be a reasonable prediction about this planet? I. The planet will probably have a mean density of around 5 g/cm3. II. The planet will
probably have a radius of around five to ten times greater than Earth's. III. The planet will probably have several satellites. IV. The planet will probably have a composition that is mostly hydrogen and helium. a. I & IV b. I, II, & III c. II, III, & IV d. I, II, & IV e. I, II, III, & IV
The mass density of normal air is, at 
and the average molecular mass of air is 29.0 u. If the mean free path of an air molecule at room temperature is measured to be 111 nm, what is the average diameter of an air molecule.
A. 0.31nm B. 0.26nm C. 0.28nm D. 0.49nm E. 0.56nm F. 0.23nm
A flywheel, of radius 1 m, is spinning with a constant angular velocity of 2 rad/s. What is the centripetal acceleration of a point on the wheel's rim?
A) 6 m/s2 B) 2 m/s2 C) 4 m/s2 D) 1 m/s2 E) 8 m/s2