A camera records what type of image?
A. Virtual only
B. Real or virtual
C. Real only
D. Electronic
Ans: C. Real only
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Which of the following statements are true about light waves?
a)The higher the frequency, the longer the wavelength. b)The lower the frequency, the longer the wavelength. c)Higher-frequency light travels faster than lower-frequency light. d)The shorter the wavelength, the higher the frequency. e)The lower the frequency, the shorter the wavelength.
A 3.0-kg block moves up a 40° incline with constant speed under the action of a 26-N force acting up and parallel to the incline. What magnitude force must act up and parallel to the incline for the block to move down the incline at constant velocity?
A. 14 N B. 12 N C. 16 N D. 18 N E. 25 N
A spherical conductor of radius 2.0 mm carries a charge of 7.1 nC. What is the magnitude of the electrical field at 6.0 mm from the center of the sphere? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 89 × 106 N/C B) 25× 106 N/C C) 1.8 × 106 N/C D) 780 × 106 N/C E) 0.89 × 106 N/C
A series LRC circuit has a 100-? resistor, a 0.100-?F capacitor and a 2.00-mH inductor connected across a 120-V rms ac voltage source operating at (1000/?) Hz. What is the resonant frequency of this circuit?
A) 70.7 kHz B) 17.9 kHz C) 22.5 kHz D) 35.3 kHz E) 11.3 kHz