1. [-/10 Points] DETAILS SERPSE10 13.A.P.039. MY NOTES ASK YOUR TEACHER The maximum distance from the Earth to the Sun (at aphelion) is 1.521 x 104 m, and the distance of closest approach (at perihelion) is 1.471 x 10 m. The Earth's orbital speed at perihelion is 3.027 x 10" m/s. Ignore the effect of the Moon and other planets. (a) Determine the Earth's orbital speed at aphelion. m/s (b) Determine the kinetic and potential energies of the Earth-Sun system at perihelion. KD = U. = (c) Determine the kinetic and potential energies at aphelion. Ka = U = (d)Is the total energy constant? Yes O No Explain. This answer has not been graded yet. Need Help? Read It3. [-/10 Points] DETAILS SERPSE10 18.5.OP.022.BIO. MY NOTES ASK YOUR TEACHER As defined by the International Association for Development of Apnea (AIDA International), static apnea is the act of holding one's breath underwater in a stationary position. The current world record for static apnea is held by Branko Petrovic, who beat the previous record by holding his breath underwater for 11 minutes and 54 seconds! To determine how this is possible, let us first compute the amount of oxygen consumed during each human breath. Tidal lung volume, the amount of air inhaled and exhaled with each breath, is approximately 500 cm for both lungs of an adult human. Oxygen comprises 21.0% of the air we inhale, and 16.0% of the air we exhale. (a) What is the mass (in g) of oxygen absorbed by the body during one breath? 19 b) Now determine how much oxygen is available (in g) to the body if one replaces the entire contents of both lungs, with a combined volume of 6.00 L, with fresh air before attempting a static apnea record. (c) Assuming that the person attempting the record can absorb all of the oxygen in his lungs, is the mass of oxygen in the lungs a reasonable measure of how long he can hold his breath? (Note: Holding your breath underwater for extended times is a dangerous activity, especially without proper training. Extended time intervals without an oxygen supply to the brain can cause brain damage.) . Yes, untrained adults can easily reduce their breathing rate to the required value during deep-breathing exercises. No, untrained adults cannot reduce their breathing rate to the required value. Not enough information is given. Need Help? Read It4. [-/10 Points] DETAILS SERPSE10 18.A.OP.030. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two rigid tanks, called tank A and tank B, are connected to each other by a small, thermally insulated plug. The plug allows gas to flow freely between the two tanks so that they are always at the same pressure, but allows the tanks to be at different temperatures. The volume of tank B is four times the volume of tank A. Initially both tanks contain a gas at a pressure of 1.00 atm and a temperature of 27.0C. Tank A is then heated to 390C while the temperature of tank B stays at 27.0 C. At this point, what is the new pressure in both tanks (in atm)? atm Need Help? Read It6. [-/10 Points] DETAILS SERPSE10 18.C.OP.039. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A cylinder is closed by a piston connected to a spring of constant 2.40 x 105 N/m. With the spring relaxed, the cylinder is filled with 5.00 L of gas at a pressure of 1.00 atm and a temperature of 20.0 C. (a) If the piston has a cross-sectional area of 0.0150 m and negligible mass, how high will it rise when the temperature is raised to 250.C? m (b) What is the pressure of the gas at 250C? Pa Need Help? Read It Watch It