Agrandfather's clock is calibrated at a temperature of 19°c. assume that the pendulum is a thin brass rod of negligible mass with a small, heavy bob attached to the end. the coefficient of linear expansion of brass is 1.9☓10-5 (°c)-1. 1) on a hot day, when the temperature is 28°c, does the clock run fast or slow? the clock runs fast. the clock runs slow. the clock remains unchanged. you currently have 2 submissions for this question. only 10 submission are allowed. you can make 8 more submissions for this question. 2) how much does it gain or lose in a 24 h period? s you currently have 1 submissions for this question. only 10 submission are allowed.