The largest moon in the solar system, bigger but NOT as massive as Mercury, is
A) Titan. B) Ganymede. C) Callisto. D) Europa. E) Triton.
B
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Which statement best describes the solar neutrino problem?
A) Theoretical models predict that neutrinos should be produced in the Sun, but no neutrinos have ever been observed to be coming from the Sun. B) Solar neutrinos were detected but in fewer numbers than predicted by theoretical models. C) No one understands how it can be possible for neutrinos to be produced in the Sun. D) Our current understanding of fusion in the Sun suggests that all neutrinos should be destroyed before they arrive at Earth, yet neutrinos are being detected. E) The term solar neutrino problem refers to the fact that neutrinos are extremely difficult to detect.
A coil with a self-inductance of 6.0 H has a constant current of 2.0 A flowing through it for 2.0 s. What is the emf induced in this coil?
A) 6.0 V B) 12 V C) 0.0 V D) 4.0 V E) 8.0 V
Ideal incompressible fluid flows through a 4.0-cm-diameter pipe at 1.0 m/s. There is a 2.0 cm diameter constriction in the line. What is the speed of the fluid in this constriction?
A) 0.25 m/s B) 0.50 m/s C) 2.0 m/s D) 4.0 m/s
An astronomer examining a compact object could conclude that it was a black hole if it _____
a. emits regular pulses of radiation b. has a defined event horizon that emits X-rays c. has an accretion disk d. has a mass greater than 1.4 solar masses e. has a mass greater than 3 solar masses