The nuclear process having by-products with least radioactivity is
A) fission.
B) fusion.
C) about the same for both.
Answer: B
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The buoyant force occurs because the pressure in a fluid increases with depth
Indicate whether the statement is true or false
In a Newton's rings apparatus, the interference effect observed between the rays occurs because of the path difference between
A) the top and bottom surfaces of the top piece of glass. B) the top and bottom surfaces of the bottom piece of glass. C) the top and bottom surfaces of the air between the pieces of glass. D) the top and bottom surfaces of the oil between the pieces of glass. E) the top surfaces between the top and bottom pieces of glass.
The heat of fusion of lead is 5.9 kcal/kg, the heat of vaporization is 207. cal/kg, and its melting point is 328°C. How much heat is required to melt 50. g of lead initially at 23°C? (The specific heat of lead is 0.031 kcal/kg-C°.)
What will be an ideal response?
A 2.00 m-long 6.00 kg ladder pivoted at the top hangs down from a platform at the circus. A 42.0 kg trapeze artist climbs to a point where her center of mass is at the center of the ladder and swings at the system's natural frequency. The angular frequency (in s?1) of the system of ladder and woman is
a. 1.01. b. 3.07. c. 4.03. d. 8.05. e. 16.2.