a torque wrench has a lever arm that is 18 inches long a force of 15 pound is applied to the end of a wrench to tighten the bolt the torque is

Select the correct answer. what was edwin hubble's contribution to the field of astronomy? a. he discovered variable stars. b. he proved that the heliocentric model accurately described our solar system. c. he found a relationship between the period luminosity and distance of stars. d. he proved that the universe is finite. e. he discovered that the universe was expanding.