Which interacts more with high-frequency sounds?
A) large bells
B) small bells
C) both the same
Answer: B
Physics & Space Science
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The primary purpose of adding chromium to stainless steel is to improve the resistance to _________.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
A neutrino is ______________
a. a photon of light b. a positively charged particle c. a subatomic particle d. a negatively charged particle
Physics & Space Science
A becquerel (Bq) is
A) a dosage of 2.58 × 10-4 C/kg. B) 3.70 × 1010 decays/s in radium. C) the SI unit of radioactivity (= 1 decay/s). D) the SI unit of absorbed dose = 1 J/kg = 100 rad. E) 10-2 J/kg.
Physics & Space Science
Most radio galaxies belong to Hubble's class ________
Fill in the blank(s) with correct word
Physics & Space Science