The term "dirty bomb" refers to
A) a bomb that uses conventional explosive to disperse radioactive materials.
B) a conventional chemical bomb that disperses pieces of metal in order to harm the maximum number of people.
C) a nuclear device that is optimized for the release of radioactive materials.
D) a nuclear device that releases neutrons in order to kill people without harming buildings and other structures.
E) any nuclear device that is used for terrorist purposes.
A
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What was Tycho Brahe's contribution to astronomy? a. He proved that Earth rotates on its own axis and revolves around the Sun
b. He designed the three laws of planetary motion. c. He discovered satellites around Jupiter, which proved Earth could move and keep its satellite. d. He described why each of the planets moved in uniform circular motion. e. He compiled detailed observations of the positions of the Sun, Moon, and planets over a period of 20 years.
If a beam of electromagnetic radiation has an intensity of 120 W/m2, what is the maximum value of the electric field? (c = 3.0 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2)
A) 1.5 kV/m B) 1.0 µT C) 1.0 µV/m D) 0.30 kV/m E) 0.0032 V/m
Our own Local Group is dwarfed by the much larger Virgo Cluster, about 50 million light years distant
Indicate whether the statement is true or false
If the intensity level of one trombone is 70 dB, what is the intensity level of 76 trombones?
A) 146 dB B) 89 dB C) 70 dB D) 76 dB E) 82 dB