When radium-223 (Z = 88) decays to radon-119 (Z = 86), the other particle emitted is a(n)
a. alpha particle
b. beta particle
c. gamma ray
d. x ray
e. none of the above
A
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: Iron transforms from the FCC to BCC ?-phase iron upon cooling at an
The specific of ice is 2.10 kJ/kg 
the heat of fusion for ice at 0
is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg
and the heat of vaporization of water at 100
is 2,256 kJ/kg. What is the final equilibrium temperature when 10.0 grams of ice at -15
is mixed with 40.0 grams of water at 
?
A. 59.5
B. 57.2
C. 53.6
D. 48.9
E. 42.6
The Hertzsprung-Russell Diagram is a plot for stars using absolute magnitude versus temperature
a. True b. False Indicate whether the statement is true or false
In perceiving its environment, a dolphin makes use of
A) echoes. B) the Doppler effect. C) ultrasound. D) all of the above E) none of the above