The maximum mass of a white dwarf is
A) about the mass of our Sun.
B) limitless; there is no theoretical limit to the maximum mass of a white dwarf.
C) about 3 times the mass of our Sun.
D) about 1.4 times the mass of our Sun.
D
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The near point with age usually
A) steadily decreases. B) approaches 25. cm. C) steadily increases. D) increases and then decreases.
After rolling half-way down an incline, a marble's kinetic energy is
A) less than its potential energy. B) greater than its potential energy. C) the same as its potential energy.
New material filling a mold forms a ______________ of the original shell or bone
a. cast b. mold c. hole d. groove
Two long parallel wires carry unequal currents in the same direction. The ratio of the currents is 3 to 1 . The magnitude of the magnetic field at a point in the plane of the wires and 10 cm from each wire is 4.0 mT. What is the larger of the two currents?
a. 5.3 A b. 3.8 A c. 4.5 A d. 3.0 A e. 0.5 A