. A train passes a stationary observer. Which of the following best describes how the amplitude and the apparent frequency of the sound waves heard by the observer change as the train moves away?

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?