Rutherfordium-261 has a half-life of 1.08 min. How long will it take for a sample of rutherfordium to lose one-third of its nuclei?
A) 1.02 min
B) 1.62 min
C) 0.63 min
D) 2.70 min
E) 3.24 min
C
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The vernal equinox is the point on the sky where the Sun crosses the ____________ going north and east
a. north celestial pole b. south celestial pole c. celestial equator d. horizon
Two ice skaters are at rest and facing each other. One skater weighs 140 lbs and the other skater weighs 180 lbs. The skaters "push off" of each other. The 140 lb skater is moving at 5.00 m/s to the EAST. What is the velocity of the 180 lb skater?
A. 6.50 m/s EAST B. 6.50 m/s WEST C. 3.89 m/s EAST D. 3.89 m/s WEST E. 1.55 m/s EAST
The Andes Mountains in South America are examples of ______________ mountains
Fill in the blank(s) with correct word
If a = 60 cm, b = 80 cm, Q = ?6.0 nC, and q = 4.0 nC, what is the magnitude of the electric field at point P?
a.
35 N/C
b.
42 N/C
c.
52 N/C
d.
64 N/C
e.
104 N/C