The threshold of hearing is _______.
a. 0 dB.
b. 180 dB.
c. 200 dB.
d. 70 dB.
e. 1 dB.
Answer: a. 0 dB.
You might also like to view...
There are more large spiral galaxies than there are large elliptical galaxies
Indicate whether the statement is true or false
An object moves 10 m east in 30 s and then returns to its starting point taking an additional 50 s. If west is chosen as the positive direction, what is the sign associated with the average velocity of the object?
a. + b. ? c. 0 (no sign) d. any of the above
A cubic box with sides of 20.0 cm contains 2.00 × 1023 molecules of helium with a root-mean-square speed (thermal speed) of 200 m/s. The mass of a helium molecule is 3.40 × 10-27 kg
What is the average pressure exerted by the molecules on the walls of the container? The Boltzmann constant is 1.38 × 10-23 J/K and the ideal gas constant is R = 8.314 J/mol•K = 0.0821 L ? atm/mol ? K. A) 3.39 kPa B) 1.13 kPa C) 570 Pa D) 9.10 Pa E) 2.26 kPa
A 200-? resistor, a 40-mH inductor, and a 2.0-?F capacitor are connected in series with a 120-V rms source at 1.0 kHz. What is the phase angle of this circuit?
A) 0° B) 45° C) 49° D) 41° E) 90°