For a one-component system under conditions of constant pressure, how many phases can normally be at equilibrium? (Answer with an integer.)

The bore of each cylinder in a six-cylinder car engine is 52 mm and the stroke for each piston is 150 mm. Calculate the cubic capacity of the engine in cm3 and calculate the clearance volume per cylinder for a compression ratio, r, of 6.75.

The pressure of an ideal gas is slowly increased to double its original pressure with no change in temperature.  What happens to the volume?    It does not change.      It halves.      It quadruples.      It doubles.

One mole of oxygen gas is at Three arterial geometries are shown in the figure, including a healthy blood vessel (i), a constricted blood vessel (ii), and a blood vessel with an aneurysm (a balloon-like bulge; (iii)). The speed of the blood at point ① in all three vessels is 40.0 cm/s.a pressure of 9.00 atm and a temperature of 38.0°C.