A cyclist is initially traveling north, then turns 90.0° and moves west at the same speed. Find the direction of the cyclist's average acceleration.

Aballet student who learns with the of his instructor is demonstrating learning.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life