Gra X The X HEC MyE X HE Log X My Cha X Cha X Log X Log X Mc Gra X o Mai X He Cha x ww x. Ans x M Rec X Wel X X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147 LE Update 15. [-/1 Points] DETAILS SERCP11 5.A.P.074. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A student evaluates a weight loss program by calculating the number of times he would need to climb a 14.0 m high flight of steps in order to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can release 3.77 x 10'] of chemical energy and the body can convert about 18.6% of this into mechanical energy (the rest goes into internal energy.) HINT a) How much mechanical energy (in ]) can the body produce from 0.450 kg of fat? (b) How many trips up the flight of steps are required for the 90.0 kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy required to return down the stairs. trips Need Help? Read It Watch It 16. [-/1 Points] DETAILS SERCP11 5.A.P.078. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A hummingbird hovers by exerting a downward force on the air equal, on average, to its weight. By Newton's third law, the air exerts an upward force of the same magnitude on the bird's wings. Find the average mechanical power (in W) delivered by a 2.60 g hummingbird while hovering if its wings beat 70.0 times per second through a stroke 3.42 cm long. HINT W Need Help? Read It Watch It Search 2:43 AM 12/4/2022 5Gra X The X HEC MyE X HE Log X My Cha X A Cha X Log X Log X My Gra X o Mai X Cha X ww X 2 Ans X M Rec X Wel X O X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147 * O K Update A hummingbird hovers by exerting a downward force on the air equal, on average, to its weight. By Newton's third law, the air exerts an upward force of the same magnitude on the bird's wings. Find the average mechanical power (in W) delivered by a 2.60 g hummingbird while hovering if its wings beat 70.0 times per second through a stroke 3.42 cm long. HINT W Need Help? Read It Watch It 17. [-/1 Points] DETAILS SERCP11 5.A.P.081. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A truck travels uphill with constant velocity on a highway with a 6.0 slope. A 40-kg package sits on the floor of the back of the truck and does not slide, due to a static frictional force. During an interval in which the truck travels 300 m, find the following. (a) What is the net work done on the package? J (b) What is the work done on the package by the force of gravity? J (c) What is the work done on the package by the normal force? J (d) What is the work done on the package by the friction force? Need Help? Read It Submit Assignment Save Assignment Progress Search 2:43 AM 12/4/2022 5Gra X The X HEC MyE X HE Log X Mcc Cha X Cha X Log X Log X Mo Gra X o Mai X He Cha X ww X 2 Ans X M Rec X *Wel X X C webassign.net/web/Student/Assignment-Responses/last?dep=29775151 * OK Update POINTS -/1 1/1 -/1 1 -/1 -11 -11 -11 -11 -11 -11 -11 -11 -11 -11 -11 1/15 6.7% + Request Extension Assignment Submission & Scoring Assignment Submission For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer. Assignment Scoring Your last submission is used for your score. 1. [-/1 Points] DETAILS SERCP11 9.2.P.001. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 59.6 kg woman stands on a horizontal surface. HINT (a) What is the volume of the woman's body (in m3) if her average density is 983 kg/m3? m 3 (b) What average pressure (in Pa) from her weight is exerted on the horizontal surface if her two feet have a combined area of 3.56 x 10-2 m? Pa Need Help? Read It 2. [1/1 Points] DETAILS PREVIOUS ANSWERS SERCP11 9.2.P.003. MY NOTES ASK YOUR TEACHER rend Search LO (DELL W 2:52 AM 12/4/2022 5Gra X The X HEC MyE X HE Log X Mcc Cha X Cha X Log X Log X Mo Gra X o Mai X He Cha x ww x 2 Ans X M Rec X Wel X X C webassign.net/web/Student/Assignment-Responses/last?dep=29775151 * OK Update 3. [-/1 Points] DETAILS SERCP11 9.2.P.007. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose a distant world with surface gravity of 7.60 m/s2 has an atmospheric pressure of 7.40 x 104 Pa at the surface. (a) What force is exerted by the atmosphere on a disk-shaped region 2.00 m in radius at the surface of a methane ocean? (b) What is the weight of a 10.0-m deep cylindrical column of methane with radius 2.00 m? Note: The density of liquid methane is 415 kg/m3. (c) Calculate the pressure at a depth of 10.0 m in the methane ocean. Pa Need Help? Read It 4. [-/1 Points] DETAILS SERCP11 9.4.P.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A normal blood pressure reading is less than 120/80 where both numbers are gauge pressures measured in millimeters of mercury (mmHg). What are the absolute and gauge pressures in pascals at the base of a 0.106 m column of mercury? (The density of mercury is PHq = 13.6 x 105 kg/ms. Assume the system is at sea level.) HINT absolute pressure (Enter your answer to at least three significant figures.) Pa (b) gauge pressure (Enter your answer to at least two significant figures.) Pa Need Help? Read It Search 2:52 AM 12/4/2022 5Gra X The X HEC MyE X HE Log X He Cha X Cha X Log X Log X Mo Gra X o Mai X He Cha x ww x Ans X M Rec X Wel X X C webassign.net/web/Student/Assignment-Responses/last?dep=29775151 E * OK (Update 6. [-/1 Points] DETAILS SERCP11 9.4.P.015. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A sphygmomanometer is a device used to measure blood pressure, typically consisting of an inflatable cuff and a manometer used to measure air pressure in the cuff. In a mercury sphygmomanometer, blood pressure is related to the difference in heights between two columns of mercury. The mercury sphygmomanometer shown in the figure below contains air at the cuff pressure P. Po The difference in mercury heights between the left tube and the right tube is h = 110 mmHg = 0.110 m, a normal systolic reading. What is the gauge systolic blood pressure gauge in pascals? The density of mercury is p = 13.6 x 105 kg/m and the ambient pressure is Po = 1.01 x 105 Pa. HINT |Pa Need Help? Read It 7. [-/1 Points] DETAILS SERCP11 9.5.P.018. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Search 2:52 AM 12/4/2022 5Gra X The X HEC MyE X HE Log X He Cha X Cha X Log X Log X Mc Gra X Mai X He Cha x ww x 2 Ans X M Rec X Wel X O X C webassign.net/web/Student/Assignment-Responses/last?dep=29775151 * OK (Update Need Help? Read It 7. [-/1 Points] DETAILS SERCP11 9.5.P.018. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 18.8 kg gold mass rests on the bottom of a pool. (The density of gold is 19.3 x 105 kg/m and the density of water is 1.00 x 103 kg/m3.) HINT (a) What is the volume of the gold (in m3)? m 3 (b) What buoyant force acts on the gold (in N)? (Enter the magnitude.) (c) Find the gold's weight (in N). (Enter the magnitude.) N (d) What is the normal force acting on the gold (in N)? (Enter the magnitude.) N Need Help? Read It Watch It 8. [-/1 Points] DETAILS SERCP11 9.5.P.021. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A hot-air balloon consists of a basket hanging beneath a large envelope filled with hot air. A typical hot-air balloon has a total mass of 514 kg, including passengers in its basket, and holds 2.80 x 10 m of hot air in its envelope. If the ambient air density is 1.24 kg/m, determine the density (in kg/m ) of hot air inside the envelope when the balloon is neutrally buoyant. Neglect the volume of air displaced by the basket and passengers. HINT Search 2:52 AM 12/4/2022 5