Which of the following is not a key feature for Chordates?

Which of the following processes during urine formation are PASSIVE?

Diabetes can cause a condition called nephrotic syndrome in which a person will suffer a loss of osmotic pressure with fluid from the plasma leaving blood vessels causing Edema (swelling). Which of the following is likely the cause of this condition?  

Which of the following is NOT a determinant of infectious diseases

Question 5 (10 points)  A tank contains 210 liters of fluid in which 20 grams of salt is dissolved. Pure water is then pumped into the tank at a rate of 3 L/min, and the well-mixed solution is pumped out at the same rate. Find the number of grams of salt in the tank at time .

Question 5 (10 points)  A tank contains 360 liters of fluid in which 40 grams of salt is dissolved. Pure water is then pumped into the tank at a rate of 6 L/min, and the well-mixed solution is pumped out at the same rate. Find the number of grams of salt in the tank at time .

Question 5 (10 points) Use the method of variation of parameters to find a particular solution of the differential equation.

Question 8 (10 points)  Determine a suitable form for if the method of undetermined coefficients is to be used.  Do NOT evaluate the constants.

Question 8 (10 points)  Determine a suitable form for , if the method of undetermined coefficients is to be used.  Do NOT evaluate the constants.

Question 6 (10 points)  A 8-pound object stretches a spring 3 inches by itself. There is no damping and no external forces acting on the system.  The spring is initially displaced by 1 inch upward from its equilibrium position and given a velocity of 2 ft/sec downward.  Find the displacement at any time t.