Ema is creating a wave using a spring. She starts moving her hand to the left and right more slowly, the wavelength of the resulting wave will what. A. Decrease (get shorter. B: increase (get longer). C; remain the same

In what direction does the medium move relative to the direction of the wave? explain.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.