Three moles of argon gas (assumed to be an ideal gas) originally at 1.50 X 104 Pa and a volume of 0.0280 m3 are first heated and expanded at constant pressure to a volume of 0.0435 m3, then heated at constant volume until the pressure reaches 3.50 X 104 Pa, then cooled and compressed at constant pressure until the volume is again 0.0280 m3, and finally cooled at constant volume until the pressure drops to its original value of 1.50 X 104 Pa. (a) Draw the pV-diagram for this cycle. (b) Calculate the total work done by (or on) the gas during the cycle. (c) Calculate the net heat exchanged with the surroundings. Does the gas gain or lose heat overall?
Cardiovascular Adaptations of the Heart We have four chambers of the heart and they are four different pumping systems o Remember that the right side is on the left side of your paper. o 1 pump comes from the right atrium to the right ventricle then out through the pulmonary artery and into lungs (to get oxygen). Then it will return to the heart through the pulmonary vein and enter the left atria, then the left ventricle. Then it will leave the heart through the aorta and go through the body to distribute oxygen. When blood enters the right side of the heart, it is depleted of oxygen. o The left and right side of the heart are separated by the intraventricular septum. This prevents the mixing of deoxygenated and oxygenated blood. During heavy exercise, the demand for oxygen may be 15-25 times greater than at rest. Your demand for oxygen is MUCH greater. o This is why the heart and lungs are designed the way they are. o The primary purpose is to deliver oxygen and remove wastes (lactic acid) from bodily tissues. It also transports nutrients, helps with temperature regulation, and maintains oxygen and carbon dioxide homeostasis in the body. Terminology: o Heart Rate: the number of times the heart beats per minute
