Mean Life: The mean life (time constant) of rubidium-86 is 26.8 d. What is its half-life?
Fill in the blank(s) with the appropriate word(s).
18.6 d
Physics & Space Science
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In a given period, the element of which group has the highest ionization energy?
a. 2A b. 8A c. 7A d. 1A
Physics & Space Science
The force required to maintain a body at constant velocity in free space is equal to
1) the mass of the body. 2) zero. 3) the weight of the body. 4) the force required to stop it. 5) none of these. This is in accordance with the law of 6) inertia. 7) action/reaction. 8) gravitation. 9) energy conservation.
Physics & Space Science
A 150 W light bulb is operating on a 120 V rms ac line. What is the rms current in the bulb?
A. 2.50 A B. 1.67 A C. 1.50 A D. 1.25 A E. 0.883 A
Physics & Space Science
The units of momentum are
A. ML/T.
B. M/T.
C. 
D. 
E. 
Physics & Space Science