A binary star system consists of two stars orbiting together. One such binary system has an orbital period of 701 years and a semi-major axis of 113 AU. What is the combined mass of the two stars in the system (in units of solar masses)?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.