A speaker can be used as a crude microphone
Indicate whether the statement is true or false
T
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A planetary nebula is visible due to ____
a. blackbody continuum radiation from the interstellar medium b. line emission from the interstellar medium c. scattering from dust grains ejected by a dying star d. blackbody continuum radiation from a hot gas ejected by a dying star e. line emission from ionized hydrogen gas ejected by a dying star
Calculate the pressure amplitude (in N/m2) of a 500 Hz sound wave in helium if the displacement amplitude is equal to 5.0 × 10^-8 m. (r = 0.179 kg/m3, v = 972 m/s.)
a. 3.5 × 10^-2 b. 1.6 × 10^-2 c. 2.7 × 10^-2 d. 4.2 × 10^-2 e. 2.0 × 10^-2
A star's luminosity tells us
A) how much energy a star produces. B) its surface temperature. C) its rotational speed. D) both how much energy it produces and its surface temperature.
This type of sediment transport moves large particles such as sand and gravel by rolling, sliding, or bouncing them along the channel bed.
What will be an ideal response?