Pluto's moon Charon orbits Pluto every 6.4 days with a semimajor axis of 19,700 km. Calculate the combined mass of Pluto and Charon.

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

This is the number of complete movements of a wave per second.

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80