Chapter 1 Practice Problems - Boles and Cengel &" edition 1-15e. A 150 lom astronaut took his bathroom scale (a spring scale that measures weight and a beam scale that compares masses) to the moon where the local gravity is { = 5.48 fo's). Determine how much he will weigh (a) on the spring scale and (b) on the beam scale. 25.5 1bf, 150 libf