Which of the following atoms normally has one covalent bond to it?
a. At
b. Se
c. Si
d. P
e. Ne
a
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Which interacts more with high-frequency sounds?
A) large bells B) small bells C) both the same
Which of the following observations of an extrasolar planet system would be inconsistent with what we expect from the nebular theory of solar system formation?
A) a system which has two terrestrial planets close in and two jovian planets farther out B) a system in which some planets have small moons orbiting in a direction opposite to the planet's rotation C) a system in which some planets rotate in a direction opposite to their orbits D) a system in which all the planets orbit in completely different planes
What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from n = 2 state to the ground state?
A) 121.5 nm B) 203.1 nm C) 243.0 nm D) 388.8 nm E) 411.1 nm
A rock from a volcanic eruption is launched straight up. Which one of the following statements about this rock while it is in the air is correct if you neglect the presence of air?
A) On the way up, its acceleration is downward and its velocity is upward, and at the highest point both its velocity and acceleration are zero. B) On the way down, both its velocity and acceleration are downward, and at the highest point both its velocity and acceleration are zero. C) Throughout the motion, the acceleration is downward, and the velocity is always in the same direction as the acceleration. D) The acceleration is downward at all points in the motion. E) The acceleration is downward at all points in the motion except that is zero at the highest point.