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

Physics & Space Science

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The Andes Mountains in South America are examples of ______________ mountains

Fill in the blank(s) with correct word

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science