A woman is riding a bicycle at 18.0 m/s along a straight road that runs parallel to and right next to some railroad tracks. A train behind her is moving away from her at a speed of 7.67 m/s. The frequency emitted by the train is 840 Hz. What is the frequency heard by the woman

Asap time is ! best answer gets compose at least one well-developed paragraph on the following: define the term concurrent powers, and give an example of a concurrent power of government.

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?