The H-R diagram is a comparison between: A. a star's size and distance from the Sun
B. a star's static levels to its brightness
C. a star's life span to its size
D. a star's absolute magnitude and temperature

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?