A hot (70°C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g•°C. John drops the metal into a 500-g calorimeter containing 40 g of water at 20°C. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g•°C. When equilibrium is reached, what will be the final temperature? (cwater = 1.00 cal/g•°C.)
a. 114°C
c. 40°C
b. 72°C
d. 37°C
C
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Electrical forces inside a nucleus contribute to nuclear
A) stability. B) instability. C) both of these D) neither of these
In which of the following nuclear processes are other forms of energy converted into nuclear energy? In other words, in which of these processes is nuclear energy created?
A) In nuclear fission of the lighter elements and nuclear fusion of the heavier elements. B) Exothermic ["heat producing"] chemical reactions. C) Supernova explosions, i.e., explosions of stars. D) Endothermic ["heat consuming"] chemical reactions. E) In nuclear fusion of the lighter elements and nuclear fission of the heavier elements.
The oldest Moon rocks are about ______________ years old
Fill in the blank(s) with correct word
The energy levels in the atom are continuous
What will be an ideal response?