Succession is a. Harmful to ecosystems
b. a natural recovery process
c. unnecessary for ecosystem recovery
d. a one-time event

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.

Based on this activity, is kinetic energy always transformed into potential energy?