Which of the following is the smallest distance?
A) diameter of a typical planet
B) 1 light-second
C) 1 AU
D) diameter of a typical star
A) diameter of a typical planet
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What happens when a core's density exceeds that which electron degeneracy pressure can support?
a. The core collapses to a black hole. b. The core collapses to a neutron star. c. The core collapses to a white dwarf. d. The core collapses to a neutron star or a black hole.
Two identical objects, one light colored and the other dark colored, are at the same cool temperature. Then, you place them outside, on a warm day, in direct sunlight. Which object will warm up faster?
A. The dark one B. Both warm up at the same rate C. The light one D. As strange as it seems, neither object will ever warm up because energy conservation prevents the addition of energy
A spherical conductor (radius = 1.0 cm) with a charge of 2.0 pC is within a concentric hollow spherical conductor (inner radius = 3.0 cm, outer radius = 4.0 cm) which has a total charge of ?3.0 pC. What is the magnitude of the electric field 2.0 cm from the center of these conductors?
A. 23 N/C B. zero C. 45 N/C D. 90 N/C E. 110 N/C
A hole is punched in a full milk carton, 10 cm below the top. What is the initial velocity of outflow?
a. 1.4 m/s b. 2.0 m/s c. 2.8 m/s d. 3.9 m/s e. 4.2 m/s