Which of the following observatories is most likely to discover a black hole in a binary system?
A) an x-ray observatory in space
B) the Hubble Space Telescope
C) an infrared observatory in space
D) a radio telescope array on the ground
A) an x-ray observatory in space
Physics & Space Science
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Three resistors, with values of 1.0, 4.0, and 10.0 ?, respectively, are connected in series. What is the overall resistance of this combination?
a. 0.7 ? b. 5.0 ? c. 4.0 ? d. 15 ?
Physics & Space Science
X-rays are emitted by way of
A) ionizing radiation. B) transitions within an atom's innermost electrons. C) transitions within the atomic nucleus. D) none of the above
Physics & Space Science
Which particle plays the key role in sustaining a fission reaction?
A) quark B) proton C) gamma photon D) electron E) neutron
Physics & Space Science
At which latitude is the noonday Sun overhead twice a year?
a. 30°S b. 23°S c. 24°N d. 30°N
Physics & Space Science