GENERAL PHYSICS 1

Please provide the best answers. (10 QS, letters with brief explanation)

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41. When a river narrows, how will water flow? b. slower d. depends on the mass of the water a. faster c. at the same rate 42. Which law of thermodynamics dictates that for objects to be in thermal equilibrium, they must have a common temperature? a. Zeroth law b. first law c. second law d. third law 43. Which temperature is hotter: 17 C or 58 OF? a. 17 OC c. Both A and B are Equal b. 58 OF d. It depends on one's feeling 44. Oxygen has a boiling point of 90.19 K. What is the temperature in Fahrenheit (to the 10th)? a. 297.328 F b. -297.328 F C. -182.96 .C d. 182.96 45. A bimetallic strip is made up of welded together. a. two metals of the same kind b. two different metals that expand and contract unequally c. two different metals that expand and contract equally d. two metal of different colors 46. The length of copper wire at 20 OC is 4.5m. Calculate its new length when the temperature is 95 C. Given a = 1.7x10-5 OC-1: a. 4.55m b. 5.41m c. 5.11m d. 4:51m 47. Why does running a jar under hot water make it easier to open? a. Because the metal expands into the spaces between the glass threads b. Because the gaps between the threads and the lid get larger as it expands c. Because hot things are more malleable d. It doesn't. 48. What will happen to the volume of a gas under constant temperature if the pressure increases? a. Increase b. Decrease c. Nothing d. Explosion 49. What happens to the volume of gas if its temperature is increased? a. Decreases b. Increases c. No change d. Becomes zero 50. When 6.0 mol of oxygen are confined in a 36-L vessel at 196 .C, the pressure is 8 atm, What is the new pressure for oxygen expands at constant temperature to fill 48 L? a. 6 atm b. 8 atm c. 12 atm d. 16 atm