Answer the following statement(s) true (T) or false (F)
1. 
U (uranium) can decay to 
Pb (lead) through an appropriate sequence of alpha and beta decay processes.
1. FALSE
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An object is placed 15 cm to the left of a double-convex lens of focal length 20 cm. Where is the image of this object located?
A) 60 cm to the right of the lens B) 60 cm to the left of the lens C) 8.6 cm to the right of the lens D) 8.6 cm to the left of the lens E) 30 cm to the left of the lens
One result of bombardment of the Moon's surface is a layer of broken, pulverized, and powdered rock called
A. regolith. B. maria. C. lunar rays. D. basalt.
On June 21, the noonday Sun is overhead at what latitude?
a. 0° b. 23.5°N c. 23.5°S d. That of the Tropic of Cancer
Circular Motion of Charges: Alpha particles, each having a charge of +2e and a mass of 6.64 ×10-27 kg, are accelerated in a uniform 0.80-T magnetic field to a final orbit radius of 0.30 m. The field is perpendicular to the velocity of the particles. How long does it take an alpha particle to make one complete circle in the final orbit? (e = 1.60 × 10-19 C)
A. 0.15 ?s B. 0.25 ?s C. 0.33 ?s D. 0.40 ?s E. 0.49 ?s