(1)  The specific gravity of a urine sample is found to be 1.110 at a temperature of 24C. The specific gravity of this urine was determined with a urinometer. What is the corrected specific gravity value of this sample? (2)    We've learned that urinometers are usually calibrated at 15 C and that we have to correct for samples that are above or below  this temperature. This is because the density of a liquid changes with temperature. Using the density formula, explain why temperature affects the density of a liquid. Explain  what happens to the density of a liquid as the temperature is raised and lowered.

The data shown below were obtained by time-lapse photography on a highway. Use regression analysis to fit these data to the Greenshields model and determine the following. Speed (mi/h) Density (veh/mi) 18.4 26.7 33.4 41.1 53.8 56.0 (a) the mean free speed (in mi/h) mi/h 80 65 50 36 15 10 (b) the jam density (in veh/mi) X The response you submitted has the wrong sign. veh/mi (c) the capacity (in veh/h) veh/h (d) the speed at maximum flow (in mi/h) mi/h

Janice is grilling a steak for her July 4th barbecue dinner. The steak initially weighs 300 grams and is 25 mm thick. After grilling it for a while, she considers the steak done, and measures it again: it now weighs 215 grams, and is 15 mm thick. For both the cooked and uncooked steak, she uses the thumb-test to determine the done-ness, i.e. she uses her thumb (area ~5cm2) to push down with a force of 5 N. The uncooked steak compresses by 7 mm, and the cooked steak by 2 mm. The change in elasticity of the steak on cooking is due partly to the loss of water volume (so that existing bonds get closer together) and partly to the creation of new bonds. Assume all of the difference in raw vs. cooked steak thickness is due to water loss that makes it thinner (25 mm thick in the uncooked steak, versus 15 mm thick in the cooked steak), and that the other dimensions of the steak (length and width) have not changed. By what percentage has the steak's volume decreased from the original value?…

An ideal gas is in a room held at a constant temperature and the pressure set at 2 atmospheres (atm). The balloon’s initial volume is 40 cm3. If the pressure is increased to 8 atm, what is the new volume of the balloon?