A traveler first drives 21.0 km east, then 28.8 km southeast, and finally 11.0 km south. Find the traveler's total displacement.

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.

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information