The fission reaction involves
A) the splitting of a large molecule into smaller molecules.
B) the splitting of a heavy nucleus.
C) the combining of two low-mass nuclei.
D) the combining of two lighter molecules into a heavier molecule.
E) the splitting of a light nucleus.
B
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Ice is less dense than liquid water because of ______________ bonding
Fill in the blank(s) with correct word
The lifetime of uranium 238 is 6.0 × 109 y, and that of uranium 235 is 1.0 × 109 y. The present abundance of uranium 238 is 140 times the abundance of uranium 235. What was the ratio of abundances 1 billion years ago?
A) 140:1 B) 6:1 C) 61:1 D) 161:1 E) 322:1
A series LR circuit consists of a battery, resistor, inductor and a switch. When the switch is closed the circuit has a time constant of 8.0 s. If the resistance and inductance of the circuit are both doubled, what is the resulting time constant?
A. 8.0 s
B. 16 s
C. 32 s
D. 4.0 s
E. 2.0 s
The top quark
a. is the only quark not yet detected experimentally. b. has been shown not to exist. c. was discovered at Fermilab. d. none of the above