Which of the following planets has a stratosphere?
A) Mercury
B) Venus
C) Earth
D) Mars
E) all of the above
C
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In a series LRC circuit the rms voltage across the resistor is 80 V, across the capacitor is 120 V, and across the inductor is 60 V. What is the phase constant for this circuit?
A. 27
B. -27
C. 37
D. -37
E. -41
Answer the following statement(s) true (T) or false (F)
1. Consider a uniformly charged circular loop and a uniformly charged straight wire. These two charge distributions create very different electric fields in the empty space that surrounds them. Even so, the divergence a distance r from the center of the loop along its axis and the divergence the same distance r from the wire’s center have the same numerical value.
Huygens' principle applies mainly to
A) refraction of waves in a medium. B) reflection of waves. C) both of these D) neither of these
On a trip, a family travels 200 km in 2.5 h on the first day, 300 km in 4.0 h on the second day, and 250 km in 3.5 h on the third day. What was the average speed, in kilometers per hour, for the total trip?