Which of the following temperatures is the lowest?
A. 0°F
B. 0°C
C. 263 K
D. All of these choices are the same
Answer: A
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Indicate whether the statement is true or false
Two radio antennas are 130 m apart on a north-south line. The two antennas radiate in phase at a frequency of 3.6 MHz
All radio measurements are made far from the antennas. What is the smallest angle, reckoned east of north from midway between the antennas, at which constructive interference of two radio waves occurs? (c = 3.00 × 108 m/s) A) 50° B) 55° C) 45° D) 40° E) 35°
A conducting rod (length = 2.0 m) spins at a constant rate of 2.0 revolutions per second about an axis that is perpendicular to the rod and through its center. A uniform magnetic field (magnitude = 8.0 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the potential difference between the center of the rod and either of its ends?
a. 16 mV b. 50 mV c. 8.0 mV d. 0.10 mV e. 100 mV
How can a focus on the original cost of a product distort economic decisions?
What will be an ideal response?