36. A silver necklace has a mass of 50 grams and a volume 4.82 cm³. It is tied to a string and lowered into a glass of water. The other end of the string is connected to a force meter. What is the reading on the force meter? (Take the density of water to be 1 g/cm³, and use 9.8 m/s² for the acceleration due to gravity.) A.0.44 N B. 0.49 N C.0.54 N D. There is not enough information to answer the question. A steel hammer (m₁ = 790 grams) is tied to a string which is hung from a force meter. A container of water (m = 5 kg) sits on a scale. The hammer is lowered completely into the water but it does not touch the bottom. Assume the density of steel is 7.9 g/cm³ and the density of water is 1.0 g/cm³. The acceleration due to gravity is 10 m/s². 37. A coffee cup sits fully submerged at the bottom of the sink filled with water. The coffee cup is 120 grams and is able to hold 0.1 liters of coffee. If the density of water is 103 kg/m³, what is the force that the sink exerts on the coffee cup? (Use 9.8 m/s² for the acceleration due to gravity.) A.0.20 N B. 1.18 N C.2.16 N D. There is not enough information to answer the question. 44. What does the force meter read? A. 6.9 N B. 7.9 N C. 8.9 N D. There is not enough information to answer this question. 45. What does the scale holding the water read? A. 49 N B.50 N C.51 N D. There is not enough information to answer this question. CS Scanned with CamScanner wing out of the hos Problems from "The MCAT Physics Book" Use the following information to answer questions 33-35: In a chemistry laboratory it is often useful to create a partial vacuum. A simple way to do this involves connecting a wide pipe to a narrow pipe which is connected to a reservoir of water (just the water line). The reservoir has pressure greater than the ambient atmospheric pressure, but once flow is established, the pressure in the narrow tube is less than atmospheric pressure. A valve can be placed in the narrow tube to take advantage of the partial vacuum. Assume that there is no viscosity and that gravity plays no role. Use the following notation: p=density of water Pair density of air = Pres pressure of the reservoir = P = atmospheric pressure A₁ atm = cross-sectional area of the narrow tube A₂ = cross-sectional area of the wide tube V₁ = velocity of water in the narrow tube V2 velocity of water in the wide tube 34. Which gives the best expression for v₁? A. (4) " 12 B. 12 Pres C. 12 Patm Patm D. V2 Pres 35. Which gives the best expression for P₁, pressure in the narrow tube? Pair Patm A. B. Patm (^)² 2 C. Pres - - - Py² D. Patm - 11pv₁² Reservoir A₁2 Pressure 75 valve Pres 33. Which gives the best expression for v₂? A. Pre res - Patm P 2(Pres-Patm B. ρ Pres-Patm A2 C. ρ D. Pres-Patm ρ AA AA 41 A2 CS Scanned with CamScanner the