The density of a neutron star is comparable to the density of an atomic nucleus
Indicate whether the statement is true or false
TRUE
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When an object is in translational equilibrium, which of these statements is not true?
A. the vector sum of the forces acting on the object is zero B. the object must be stationary C. the object has a constant velocity D. the speed of the object is a constant
_________is the most widely used low-cost commodity plastic for engineering applications.
Fill in the blank(s) with the appropriate word(s).
A large calorie (Cal) is the amount of heat needed to change the temperature of one ______________ of water by one Celsius degree
a. dekagram b. centigram c. gram d. kilogram
Many meteorites appear to have formed very early in the solar system's history. How do these meteorites support the nebular theory's scenario for the formation of the terrestrial planets?
A) The appearance and composition of these meteorites is just what we'd expect if metal and rock condensed and accreted as the nebular theory suggests. B) The sizes of these meteorites are just what we'd expect if metal and rock condensed and accreted as the nebular theory suggests. C) The overall composition of these meteorites is just what we believe the composition of the solar nebula to have been: mostly hydrogen and helium. D) The appearance and composition of these meteorites matches what we observe in comets today, suggesting that they were once pieces of icy planetesimals.