An object weighing 10 grams is spinning in a centrifuge such that an acceleration of 13.0 g is imposed to it. the arm connecting the shaft to the object is r = 6.0 inches. if a = acceleration = rω2 where ω = angular speed in rad/s, determine:
mass of the object in lbm
rpm (revolutions per minute) of the shaft
force acting on the object in lbf

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.