1. The problem statement, all variables and given/known data A bar suspended in air weighs 1.75 N The same bar weigs only 1.4 N when suspended in water. Calculate; a. upthrust b. density of the bar 2. Relevant equations D = m/v F = m*a 3. The attempt at a solution a. Upthrust is 1.75 N - 1.4 N = 0.35 N b. Assuming density of water is 1x103 kg m-3 and weight of bar displaces that amount of water. So volume 1.75 N of water = 1.75 N / (1x103 * g) = 1.78 m3 Density of bar = m/v = 1.75 N / 1.78 m3 = 0.98 N m-3 which has to be wrong, surely, or the bar would float . . . Help! Thank you.