A fission reaction in which more neutrons are given off than are needed to initiate the reaction is called

A) a critical reaction.
B) a chain reaction.
C) a fusion reaction.
D) a neutron catastrophe.
E) a chemical reaction.


B

Physics & Space Science

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Specific Heat: In a flask, 114.0 g of water is heated using 67.0 W of power, with perfect efficiency. How long will it take to raise the temperature of the water from 15°C to 25°C? The specific heat of water is 4186 J/kg ? K.

A. 71 s B. 4.1 s C. 17 s D. 320,000 s

Physics & Space Science

Which of the above would best describe how soap behaves in water?

A) a B) b C) c D) d E) none of the above

Physics & Space Science

Each atom in a sample of lithium (Z=3, atomic mass 6.941 u) has one electron removed. If exactly 1.0 mC was collected in this way, what is the mass of the lithium sample?

A. 0.024 ?g B. 0.010 ?g C. 0.031 ?g D. 0.072 ?g

Physics & Space Science

The strength of a beam is most related to its

A) cross section. B) length. C) both of these

Physics & Space Science