The audible range of sound is from 20 Hz to ______________ kHz
Fill in the blank(s) with correct word
20
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The apparent magnitude of a star tells us how bright the star would appear if placed at a distance of 10 pc from the Sun.
Answer the following statement true (T) or false (F)
The gap between electrodes in a spark plug is 0.06 cm. In order to produce an electric spark in a gasoline-air mixture, the electric field must reach a value of 3 × 10^6 V/m. What minimum voltage must be supplied by the ignition circuit when starting the car?
A string with a fixed frequency vibrator at one end is undergoing resonance with 4 antinodes when under tension T1 . When the tension is slowly increased the resonance condition disappears until tension T2 is reached, there being no resonances occurring between these two tensions. How many antinodes are there in this new resonance?
a. 3 b. 4, since all resonances in this situation have the same number of nodes c. 5 d. 2, since resonances only involve whole wavelengths e. 6, since resonances only involve whole wavelength
A hole is punched in a full milk carton, 10 cm below the top. What is the initial velocity of outflow?
a. 1.4 m/s b. 2.0 m/s c. 2.8 m/s d. 3.9 m/s e. 4.2 m/s