You hear the engine roaring on a race car at the starting line. predict the changes in sound as the race starts and approaches the camera a. the sound of the engine will get louder and pitch lower b. the sound of the engine will get louder and pitch higher c. the sound is determined by the car and it will not change in anyway d. the sound of an engine will get louder but the pitch will not change

Explain the doppler effect in terms of frequency, wavelength, and speed.

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

Identify some abiotic characteristics of the tundra biome.