One of the intriguing questions for scientists of many ages has been "What are the elementary particles?" Which of the following is not considered an elementary particle?
A. Electron
B. Quark
C. Proton
D. Muon
Answer: C
You might also like to view...
Radiation Doses: The maximum permissible workday dose for occupational exposure to radiation is 11 mrem. A 77-kg laboratory technician absorbs 2.3 mJ of 0.5-MeV gamma rays in a work day. The relative biological effectiveness (RBE) for gamma rays is 1.00. What is the number of gamma-ray photons absorbed by the technician in a workday?
A. 3 × 1010 B. 3 × 109 C. 3 × 108 D. 1 × 109 E. 1 × 108
Young's Modulus: A vertical 30-cm steel rod, 1.0 cm in diameter, supports a 300-kg mass. What is the change in length of the rod caused by this mass? Young's modulus for steel is 2.0 × 1011 N/m2.
A. 5.6 × 10-5 m B. 6.5 × 10-5 m C. 5.6 × 10-6 m D. 6.5 × 10-6 m E. 6.5 × 10-4 m
Suppose the date is June 21 and the Sun never rises, just touching your southern horizon at midnight. Where are you?
A) the equator B) the Tropic of Cancer (latitude 23-1/2°N) C) the Tropic of Capricorn (latitude 23-1/2°S) D) the Arctic Circle (latitude 66-1/2°N) E) the Antarctic Circle (latitude 66-1/2°S)
An electron, starting from rest and moving with a constant acceleration, travels 2.0 cm in 5.0 ms. What is the magnitude of this acceleration?
a. 2.5 km/s2 b. 0.80 km/s2 c. 1.6 km/s2 d. 1.3 km/s2 e. 3.2 km/s2