Which of the following cannot be true of the very first stars formed in the universe?
A) Some may have formed in large clusters.
B) Some may have all exploded as supernovae by now.
C) Some may have formed singly, in isolation from one another.
D) Some may still exist in the Milky Way today.
E) Some may have had rocky planets around them.
E
You might also like to view...
A weight lifter can bench press How many milligrams (mg) is this?
A) 1.71 × 108 mg B) 1.71 × 109 mg C) 1.71 × 107 mg D) 1.71 × 106 mg
The practice of science: In what ways does the modern practice of science establish positive feedback (see table 3.2 ) to encourage further discoveries?
Can you identify elements of the historical accounts of Copernicus, Tycho, Kepler, and Galileo that provide an example of positive feedback?
What helps explain the fact that neutrons rather than protons make the nucleus of a heavier element more stable?
a. The gravitational force of the neutrons attracts all other nucleons, but a proton can also repel other nucleons with the same charge. b. The weak force in the nucleus of a heavy element is balanced by the presence of more neutrons. c. The strong force for between a neutron and another nucleon is much stronger than between a proton and a proton. d. The strong force exerted by both neutrons and protons acts between neighboring nucleons, while the electrostatic repulsion between protons has longer range. e. The strong force increases as the element gets heavier, which makes it harder for protons to join the nucleus.
It was exciting to discover higher-transition temperature superconductors because cooling represents a significant energy cost
What will be an ideal response?