Where does gold (the element) come from?
A) It is produced by mass transfer in close binaries.
B) It is produced during the supernova explosions of high-mass stars.
C) It is produced during the late stages of fusion in low-mass stars.
D) It was produced during the Big Bang.
B
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Nature's most basic electric charge quantities are associated with the elementary particles and anti-particles. These basic charge quantities are
A. 
B. 
C. 
D. 
What particle is emitted when 20Na decays to 20Ne? (atomic numbers of Na and Ne are, respectively, 11 and 10)
a. alpha b. beta (electron) c. beta (positron) d. gamma quantum
A woman is straining to lift a large crate, without success because it is too heavy
We denote the forces on the crate as follows: P is the upward force the woman exerts on the crate, C is the vertical contact force exerted on the crate by the floor, and W is the weight of the crate. How are the magnitudes of these forces related while the woman is trying unsuccessfully to lift the crate? A) P + C = W B) P + C < W C) P + C > W D) P = C
The Declaration of Principles Concerning Activities Following the Detection of Extraterrestrial Intelligence states that the first thing to do after the detection of a possible signal is to
A) send a reply B) announce the discovery to the public C) confirm that it is genuine D) classify it top secret