Both black and white road surfaces absorb sunlight. The warmer road surface at the end of a sunny day is the
A) black surface.
B) white surface.
C) neither of these
Answer: A
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A parallel plate capacitor has air in between the plates, which are circular with radius 0.07 m. The separation gap is 0.375 mm. What is the maximum energy that can be stored in this capacitor if air-breakdown is to be avoided? The breakdown threshold field is approximately 
a. 
b. 
c. 
d. 
A step-up transformer has an input voltage of 110 V (rms). There are 100 turns on the primary and 1500 on the secondary. What is the output voltage?
a. 1 600 V (max) b. 1 650 V (rms) c. 3 260 V (max) d. 165 kV (rms) e. 7.3 V (rms)
When the Moon is directly opposite the Sun in the sky, its phase is:
A) new. B) waxing or waning crescent. C) first or third quarter. D) waxing or waning gibbous. E) full.
What is the relationship between wave frequency and period? What is the period, in seconds, that corresponds to each of the following frequencies: (a) 10 Hz, (b) 0.2 Hz, (c) 60 Hz?
What will be an ideal response?