Question 1 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: Try answering this one from memory: 1. Freezing point of water (at 1 atm): 32 F = .C . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 2 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: Try answering this one from memory: 2. Freezing point of water (at 1 atm): 32 F = K . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 3 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: Try answering this one from memory: 3. Boiling point of water (at 1 atm): 212 F = .C . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 4 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: Try answering this one from memory: 4. Boiling point of water (at 1 atm): 212 F = K . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 5 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: 5. Boiling point of liquid nitrogen (at 1 atm): -196 C = K . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 6 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: 6. Typical room temperature: 25 C = K . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 7 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: 7. Human body temperature: 37'C = K . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 8 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: 8. "Surface" of the Sun: 5500 C = K . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 9 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: 9. Solar corona (thin gas surrounding the Sun): 1.5 x 106 .C = x 106 K . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 10 of 23 0.5 Points Click to see additional instructions Questions #1-10: Convert the following temperatures into the units specified: 10. Core (center) of the Sun: 1.5 x 107 .C = x 10' K . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 11 of 23 0.5 Points Questions #11-15: Shown here is the PT phase diagram for an unknown substance. First, identify the substance's state-of-matter in each of the three large regions of the diagram. Then answer the following questions: 11. True/False: At 75 K, this substance is solid at all pressures. 4.0 3.0 pressure [atm] 2.0 1.0 0 0 100 200 300 400 temperature [K]\fQuestion 12 of 23 0.5 Points Questions #1115: Shown here is the PTphase diagram for an unknown substance. First, identify the substance's state-ofmatter in each of the three large regions of the diagram. Then answer the following questions: 12. At the pressure and temperature in your room right now, this substance would be in which state? 0 A. Solid Reset Selection C] Mark for Review What's This? Question 13 of 23 1 Points Click to see additional instructions Questions #1115: Shown here is the PTphase diagram for an unknown substance. First, identify the substance's state-ofmatter in each of the three large regions of the diagram. Then answer the following questions: 13. At 2.0 atm pressure, the substance's boiling point is approximately: \\: K C] Mark for Review What's This? Question 14 of 23 1 Points Click to see additional instructions Questions #11-15: Shown here is the PT phase diagram for an unknown substance. First, identify the substance's state-of-matter in each of the three large regions of the diagram. Then answer the following questions: 14. This substance cannot exist as a liquid if it is at a pressure below what value? atm Mark for Review What's This? Question 15 of 23 0.5 Points Questions #11-15: Shown here is the PT phase diagram for an unknown substance. First, identify the substance's state-of-matter in each of the three large regions of the diagram. Then answer the following questions: 15. If kept at a constant pressure of 1.5 atm while heated from 50 K to 300 K, what happens to the substance? A. It only melts. B. It only boils. C. It only sublimates. D. It first melts, then later boils. Reset Selection Mark for Review What's This?Question 16 of 23 1 Points Click to see additional instructions Questions #16-17: At a science museum, a stationary bicycle is connected to an electric generator. By pedaling steadily, a museum visitor is able to keep a 75- watt light bulb fully lit for 45 seconds. 16. What is the total energy, in kilojoules, consumed by the light bulb during this time? KJ . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 17 of 23 1 Points Questions #16-17: At a science museum, a stationary bicycle is connected to an electric generator. By pedaling steadily, a museum visitor is able to keep a 75- watt light bulb fully lit for 45 seconds. 17. Suppose that only 11 percent of the person's food-energy is actually delivered to to the light bulb as electrical energy, while the remainder is expended on biological processes, friction, and other inefficiencies in the bicycle and generator. (Laulima contains a unique randomized value for the percentage.) How many dietary Calories of food-energy did the person use during the time described above? dietary Calories . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible.Question 18 of 23 1 Points Click to see additional instructions Questions #1819: A particular kitchen blender delivers 1100 watts of mechanical power while blending the mixed fruit in its carafe to make a smoothie. Assume that 100% of this power is absorbed by the food as the blades spin. 18. If the blender runs for 23 seconds, what is the total energy, in kilojoules, delivered to the food? 3 k] - Calculate and enter your final answer to at least 2 Significant gures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Lauiima to judge your answer to be wrong. - Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. - Partial credit is NOT possible. [:] Mark for Review What's This? Question 19 of 23 1.5 Points Questions #18-19: A particular kitchen blender delivers 1100 watts of mechanical power while blending the mixed fruit in its carafe to make a smoothie. Assume that 100% ofthis power is absorbed by the food as the blades spin. 19. If the food has a total mass of 'l .9 kg and an average specific heat capacity of 3.3 kJ/(kg-K), what is the average temperature increase of the food, in degrees Celsius? \\: 'C (Laulima contains unique randomized values for the mass and specific heat.) Assume rapid heat transfer and mixing within the food, and that 700% of the heat remains in the food. Assume no phase transitions for the food. - Calculate and enter your final answer to at least 2 signicant gures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Lauiima to judge your answer to be wrong. - Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. - Partial credit is NOT possible. Question 20 of 23 2 Points 20. A 2.20-kg iron pot contains 3.00 kg of water, all initially at 25.0 C. A hot iron horseshoe with a mass of 463 grams is dropped into the water. After the pot, horseshoe, and water all reach thermal equilibrium, the final temperature of all three is 33.0 C. What was the initial temperature of the hot horseshoe, in degrees Celsius? .C (Laulima contain a unique randomized value for the horseshoe mass.) Assume rapid heat transfer within the system, and that the system is fully insulated from its surroundings. Specific heat capacities: Giron = 450. J/(kg.K) Cwater = 4186 J/(kg.K) . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 21 of 23 2 Points 21. How much total heat is required to transform 1.55 liters of liquid water that is initially at 25.0 C entirely into H20 vapor at 100. C? Convert your final answer to megajoules. MJ (Laulima contains a unique randomized value for the volume of water.) Assume rapid heat transfer within the system, and that the system is fully insulated from its surroundings. Physical values for H20, although you may not need to use all of them: "liquid water = 4186 J/(kg.K) Lf = 334,000 J/kg Lv = 2,256,000 J/kg . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. Partial credit is NOT possible