If you walk towards a mirror at a certain speed, the relative speed between you and your image is
A) half your speed.
B) your speed.
C) twice your speed.
D) none of the above
Answer: C
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A radio wave signal, which transmits at a frequency of 10.4 MHz, has what wavelength? (c = 3.00 × 10^8 m/s)
a. 28.8 m c. 4.17 m b. 2.4 × 10^-2 m d. 41.7 m
A Carnot engine has an efficiency of 83.0% and performs 4500 J of work every cycle. How much energy is discharged to the lower temperature reservoir every cycle?
A) 922 J B) 833 J C) 744 J D) 3735 J E) 5422 J
A speed of 65 miles per hour is the same as which of the following? (1.00 ft = 30.48 cm)
A) 24 m/s B) 29 m/s C) 32 m/s D) 37 m/s E) 42 m/s
A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the paper. Directed out of the plane of the paper is a magnetic field of 0.06 T. The field out of the paper decreases to 0.02 T in 12 milliseconds
(a) What is the magnitude of the change in magnetic flux enclosed by the coil? (b) What is the average voltage induced in the coil as the flux is changing? (c) If the coil has a resistance of 4.0 ohms, what is the magnitude of the current in the coil?