How to convert 280.6 mPa to dBSPL?
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- A large balloon used to sample the upper atmosphere is filled with 845 m3 of helium. What is the mass of the helium (in kg)? kgThe correct answer is 9.6 x 106J like it shows in the picture. I keep getting an answer like yours.What is the frequency (in Hertz) of red light that has a wavelength of 689 nm?