A sample contains 
The half-life of 
years. What is the activity of the sample?
A. 3300 Bq
B. 1250 Bq
C. 382.0 Bq
D. 265.0 Bq
E. 3.000 Bq
D. 265.0 Bq
Physics & Space Science
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Find the orbital speed of an ice cube in the rings of Saturn
The mass of Saturn is 5.68 × 1026 kg and the rings have an average radius of 100,000 km. (G = 6.67 × 10-11 N ? m2/kg2) A) 27.5 km/s B) 13.8 km/s C) 1.95 km/s D) 19.5 km/s
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Where does nuclear fusion occur in the Sun?
A) on the surface B) anywhere below the surface C) in its core D) just above the visible surface E) all of the above
Physics & Space Science
When a boxer is moving away from a punch, the force experienced is reduced because
A) momentum transfer is reduced. B) the time of contact is increased. C) the force is less effective. D) all of the above
Physics & Space Science
The units T•m2/s are equivalent to:
a. V. c. W. b. N/m. d. webers.
Physics & Space Science