If you hear thunder 5.0 s after seeing a flash of lightning, the distance to the lightning strike is about
A) 2.2 km.
B) 0.60 km.
C) 1.7 km.
D) 0.90 km.
E) 1.2 km.
C
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An electron is known to be confined to a region of width 0.10 nm. What is an approximate expression for the least kinetic energy it could have, expressed in eV?
What will be an ideal response?
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A series RLC circuit has a 100-? resistor, 2.0-mH inductor and a 4.0-?F capacitor connected across a 120-V rms AC source at (1000/?) Hz. What is the power factor of this circuit?
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