A neutron is characterized by the term "thermal neutron" when
a. its energy is of the order kT, where T is on the order of 0°C.
b. its energy is of the order kT, where T is on the order of 0 K.
c. its energy is of the order kT, where T is on the order of 273°C.
d. its energy is of the order kT, where T is on the order of 100°C.
e. its energy is of the order kT, where T is on the order of 0°R.
a
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You note that a particular star is directly overhead. It will be directly overhead again in:
A) 1 hour. B) 12 hours. C) 23 hours 56 minutes. D) 24 hours. E) 24 hours 4 minutes.
With no air resistance a projectile fired horizontally maintains its horizontal component of velocity because
A) no forces act on it. B) no horizontal forces act on it. C) of no initial vertical component of velocity. D) all of the above E) none of the above
The person who first explained the discrete hydrogen atom spectrum was
a. Max Planck. b. Albert Einstein. c. Neils Bohr. d. Erwin Schrödinger. e. Werner Heisenberg.
The following conversion equivalents are given:
1.0 mile = 5280 ft 1.0 ft = 12 in 1 m = 39.37 in 1.0 hour = 60 min 1.0 min = 60 s If a deer runs at 4.7 mi/h, its speed, in meters per second, is closest to A) 2.1 m/s. B) 1.7 m/s. C) 1.9 m/s. D) 2.3 m/s. E) 2.5 m/s.