Arailroad train is traveling at 30.0 m/s in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound is 344 m/s.

What is a costume plot? why is it important to a film or theater production?

The amount of potential energy possessed by an elevated object is equal to what?

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative