If bulb C were unscrewed: _________
a. bulb A and bulb B would be equally bright.
b. bulb A would be brighter than bulb B.
c. bulb A would be dimmer than bulb B.
d. bulb A would go out.
e. bulb B would go out.
a
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An electromagnetic wave with a peak magnetic field component of 3.2 × 10^-7 T carries what average power per unit area? (m0 = 4p × 10^-7 T×m/A, e0 = 8.85 × 10^-12 C2/N×m2, and c = 3.00 × 10^8 m/s)
a. 12 W/m2 c. 2.7 W/m2 b. 3.0 W/m2 d. 1.3 W/m2
Very importantly, a hydraulic press can multiply
A) forces. B) pressures. C) energy. D) all of the above E) none of the above
The bob of a simple pendulum has its maximum kinetic energy at the
A) top of its swing. B) bottom of its swing. C) midpoint between top and bottom. D) at all points along its path of swing.
An interval of one Celsius degree is equivalent to an interval of:
a. one Fahrenheit degree. b. one kelvin. c. 5/9 Fahrenheit degree. d. 5/9 kelvin.