The second law of thermodynamics leads us to conclude that A. it is theoretically possible to convert heat into work with 100% efficiency. B. disorder in the universe is increasing with the passage of time. C. the average temperature of the universe is increasing with the passage of time, D. the total energy of the universe is constant. E. the entropy of the universe remains constant.

Blank liquids and gases exert a buoyant force on objects placed in them

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.