An artificial satellite orbits Earth at a speed of 7800 m/s and a height of 200 km above Earth's surface. The satellite experiences an acceleration due to gravity of
A
39 m/s2
B
less than 39 m/s2 but greater than 9.8 m/s2
с
9.8 m/s2
D
less than 9.8 m/s2 but greater than zero
E
zero

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Properties seen when one one substance changes to another are known as properties