The Debye-Hückel Theory and the Güntelberg and Davies Approximations are not accurate for very high ionic-strength solutions like seawater. Thus, more complicated methods must be used to calculate activity coefficients in seawater, or they can be determined experimentally. One study reported the following activity coefficients: Chemical Species Activity Coefficient (y) Ca2+ 0.28 CO32- 0.20 CaCO3 1.13* For a seawater sample with 140 µM Ca 2+ and 210 μM CO32-, let's determine if precipitation of CaCO3 is thermodynamically favorable: A) If you ignored the effect of the salinity on the activities of all the chemical species, what would be the value of Q? Based on this value of Q, would you expect CaCO3 to precipitate? B) Considering the activity coefficients given in the table above, what would be the value of Q (IAP)? Based on this value of Q (IAP), would you expect CaCO3 to precipitate?

The Jeffersonville Transportation Study area has been divided into four traffic zones. The following data have been compiled. Travel Time (min) District Productions Attractions 1 2 3 4 1 3,000 3,000 5 8 12 15 2 1,000 400 8 5 10 8 3 2,000 4,500 12 10 5 7 4 2,500 600 15 8 7 5 Travel Time 1 5 6 7 8 10 12 15 Fij 2.00 1.30 1.10 1.00 0.95 0.85 0.80 0.65 After the first iteration, the trip table was as follows. District 1 2 3 4 Ps 1 1,415 138 2 367 67 1,306 141 493 73 3 522 4 641 74 125 As 2,945 404 1,478 256 4,550 601 3,000 1,000 1,273 131 2,000 2,500 Complete the second iteration. District 1 2 3 4 Computed A 1 2 3 4 Computed P

A race car enters the circular portion of a track that has a radius of 65 m. Disregard the 70 m in the picture. When the car enters the curve at point P, it is traveling with a speed of 120 km/h that is increasing at 5 m/s^2 . Three seconds later, determine the x and y components of velocity and acceleration of the car. I'm having trouble getting the correct y component of acceleration. all the other answers are correct. thank you!