The star Aldebaran is seen today just on the western horizon at 9:38 P.M. Tomorrow night at 9:38 P.M., Aldebaran will be ________.
A. below the horizon
B. on the eastern horizon
C. on the horizon
D. above the horizon
E. None of these choices is correct.
Answer: A
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When an ideal gas adiabatically expands
A. the temperature of the gas changes. B. the internal energy of the gas does not change. C. work is not done on or by the gas. D. no heat is given off or taken in by the gas.
How can Betelgeuse be only half the Sun's surface temperature, yet about 10,000 times more luminous than the hotter Sun?
What will be an ideal response?
When electrons fill a subshell in which the orbitals have equal energy, the order in which the orbitals are filled is such that
a. a minimum number of electrons has unpaired spins. b. a minimum number of electrons has intrinsic angular momentum. c. a maximum number of electrons has unpaired spins. d. a maximum number of electrons first fills the next energy level. e. the maximum number of electrons has the same set of quantum numbers.
Particle A (mass = m, charge = Q) and B (mass = m, charge = 5 Q) are released from rest with the distance between them equal to 1.0 m. If Q = 12 mC, what is the kinetic energy of particle B at the instant when the particles are 3.0 m apart?
a. 8.6 J b. 3.8 J c. 6.0 J d. 2.2 J e. 4.3 J