Final answer:
Aerodynamic heating becomes significant and helps to reduce icing on aircraft at high speeds, typically during supersonic flight, which exceeds the speed of sound.
Step-by-step explanation:
Aerodynamic heating, which helps to reduce icing on the leading edges of aircraft, becomes significant at high speeds, typically those reached during supersonic flight (speeds exceeding the speed of sound, about 343 meters per second at sea level). At these high velocities, friction between the air and the surface of the aircraft generates significant heat, discouraging ice formation. Transonic speeds, which occur as an aircraft approaches the speed of sound (around Mach 0.8 to 1.2), also generate notable aerodynamic heating effects, although to a lesser extent than supersonic speeds.