Exhibit 17-1
The figure below shows a sine wave at one point of a string as a function of time.
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Use the exhibit to answer the following question(s).
Refer to . Which of the graphs below shows a wave where the amplitude and the frequency are doubled?
a.
d
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Derive an expression for the geometric shape factor F1–2 for a rectangular surface A1, 1 by 20 m placed parallel to and centered 5 m above a 20-m-square surface A2.
GIVEN
• Rectangular surface A1 and square surface A2
• A1 is parallel to and centered 5 m above A2
• Dimensions of A1 = 1 m × 20 m
• A2 is 20 m square
FIND
• The shape factor F12
SKETCH
Addition by Components: You walk 53 m to the north, then you turn 60° to your right and walk another 45 m. Use components to determine the direction of your displacement vector. Express your answer as an angle relative to east.
A. 63° N of E B. 50° N of E C. 57° N of E D. 69° N of E
A capacitor of capacitance C = 5 ?F and initial charge Q = 30 ?C is connected to an inductor of inductance L = 20 mH. What is the electric current in the circuit when the energy stored in the capacitor is 25% of its maximum value?
A) 0.001 A B) 0.08 A C) 0.04 A D) 0.02 A E) 0.01 A
You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km drive will be
A) greater than 70 km/h. B) equal to 70 km/h. C) less than 70 km/h. D) exactly 38 km/h. E) It cannot be determined from the information given because we must also know directions traveled.