Combining two sounds of equal intensity will give a sound level ___________ than the sound level due to just one of them
a. twice as loud c. 10 dB higher
b. 3 dB higher d. 2 dB higher
B
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Parallel-Plate Capacitor: The potential difference between the plates of an ideal air-filled parallel-plate capacitor with a plate separation of 6.0 cm is 60 V. What is the strength of the electric field between the plates of this capacitor?
A. 60 V/m B. 500 V/m C. 1000 V/m D. 2000 V/m E. 3600 V/m
At what rate is the human body radiating energy when it is at 33°C? Take the body surface area to be 1.4 m2, and approximate the body as a black body
What will be an ideal response?
In an LCR series circuit, if the AC frequency is increased to a very large value, what value does the magnitude of the angle between the current and voltage phasors approach?
a. 0° c. 180° b. 45° d. 90°
An electromagnetic wave with a peak magnetic field component of 1.59 × 10^?7 T has an associated peak electric field component of what value? (?0 = 4? × 10^?7 T?m/A, ?0 = 8.85 × 10^?12 C2/N?m2 and c = 3.00 × 10^8 m/s)
a. 2.10E–2 N/C b. 5.30E–9 N/C c. 4.77E+1 N/C d. 1.89E+8 N/C e. 5.99E–6 N/C