A neutral atom has electron configuration 1s22s22p63s23p2. What element is this?
A)
carbon
B)
iron
C)
nitrogen
D)
silicon
E)
germanium
D
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Which of these is/are not true of nuclear fission reactors?
a. Their intended output is heat. b. They produce the majority of the electric energy used in the world. c. There is a small chance one could explode like an atom bomb. d. Some can produce or "breed" more nuclear fuel than they consume.
If a person in Alaska were locked out of his house on a day when the temperature outside was ?40°C, his thick clothing would mostly reduce the loss of thermal energy by
a. conduction. b. convection. c. radiation. d. all of the above. e. convection and radiation.
A 4.0-mH coil carries a current of 5.0 A. How much energy is stored in its magnetic field?
A) 10 mJ B) 2.0 mJ C) 20 mJ D) none of the given answers
Charge of uniform density 90 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 2.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis)
a. 1.9 V b. 1.4 V c. 2.2 V d. 2.8 V e. 4.0 V