Which answer best describes earth's atmosphere

An astronomer at the equator measures the doppler shift of sunlight at sunset. from this, she calculates that earth’s tangential velocity at the equator is 465 m/s. the centripetal acceleration at the equator is 3.41  10 2 m/s 2 . use this data to calculate earth’s radius.

The necleus of an atom is made up of what subatomic particles?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg