A sievert (Sv) is
A) the SI unit of absorbed dose = 1 J/kg = 100 rad.
B) 10-2 J/kg.
C) 3.70 × 1010 decays/s in radium.
D) a dosage of 2.58 × 10-4 C/kg.
E) the effective dose of 1 Gy.
E
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Indicate whether the statement is true or false
Which element is critical to the formation of the volcanic surface of Io?
A) silicon B) sulfur C) phosphorus D) iron E) carbon
A train is traveling due south at a constant
velocity of 86 mi/h. Any unbalanced force acting on the train with respect to the Earth’s surface must be a)zero. b)directed vertically upward. c)directed toward the south. d)directed vertically downward.
as a guide, prepare a similar table showing the order of magnitudes of the thermal resistances of a unit area for convection between a surface and various fluids.
GIVEN • The order of magnitude of convective heat transfer coefficient ( h c) FIND • The order of magnitudes of the thermal resistance of a unit area (A Rc)