A chunk of ice (T = -20°C) is added to a thermally insulated container of cold water (T = 0°C). What happens in the container? O The ice melts until thermal equilibrium is established. The water cools down until thermal equilibrium is established. Some of the water freezes and the chunk of ice gets larger. None of the above things happen.
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- On a trip, you notice that a 5.30-kg bag of ice lasts an average of one day in your cooler. What is the average power in watts entering the ice if it starts at 0°C and completely melts to 0°C water in exactly 24 hours (1 Watt-1 Joule/second and Latent heat of fusion of water is 334 kJ/kg and latent heat of vaporisation of water is 2256 kJ/kg) O A. 20.49 W O B. 1770 W ○ C. 20.49 kW O D. None of the options provided is correct. O E. 78.44 WQUESTION 9 During the video on heat conduction, H through a single pane window was calculated. Now, consider a window that has wo panes with a 6 mm air gap between them. Each pane has an area of 1.9 m. The window separates the inside of a house at 22 °C from the outside at 0°C. Let Kair = 0.03 W/(m-K). Hint: This problem can be simplified by noting that the thermal conductivity of glass is much greater than air, so the effect of the glass on the total conductivity can be ignored. Therefore, the purpose of the two glass panes is to support the layer of air between them. Calculate the heat current H through the double glass pane window in watts. Do not include units in your answer and state your numerical answer in normal form. QUESTION 10 Consider process 3 in the figure below (or in First_Exam_Figures.pdf) shown by the bold solid line with an arrowhead. The pressure of a gas is decreased at constant volume. V. Click Save and Submit to save and submit. Click Save All Ansuers to save all…Two bodies P and Q are in thermal equilibrium. This statement means that 18. A There is no transfer of energy between P and Q. B The rate of transfer of heat between P and Q is constant. C P and Q have the same amount of internal energy. D Pand Q are in physical contact with cach other.
- A granite ball of radius 9.00 m and emissivity 0.046 is heated to 150°C. (a) Convert the given temperature to Kelvin. (Enter your answer to at least the nearest Kelvin.) K (b) What is the surface area of the ball? m2 (c) If the ambient temperature is 25.0°C, what net power does the ball radiate? WA granite ball of radius 4.00 m and emissivity 0.042 is heated to 150°C. (a) Convert the given temperature to Kelvin. (Enter your answer to at least the nearest Kelvin.) K(b) What is the surface area of the ball? m2(c) If the ambient temperature is 25.0°C, what net power does the ball radiate? W17.1 kg water in the pond turns to ice in that he 2. a). How much energy is given to your body when 0.4 kg of steam condenses on your skin? b). If the same amount of energy were used to warm 4 kg of water( which is ten times the amount of steam) initially at 0 deg Celsius, what would be the final temperature of the water in deg C and c) in deg F? * 3. The heat of vaporization of ethyl alcohol is 8.5 x 10^5 J/kg. If 2 kg of it od 07 were allowed to vaporize in a refrigerator, how much energy would be drawn from the air molecules? *
- 0 F2 W S 9. A 44.0-kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.80 m/s and the final speed is 4.00 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice. Determine the mass of ice that melts into water at 0°C. grams #3 3 X 20 F3 E D ASA $ C 200 F4 R F er de % 5 V F5 T G MacBook Air B ... F6 Y & 7 H F7 U N CO * 8 J DIL F8 - M 9 K F9 O V O H F10 PEL 000 Р C I F11 + F12 ?Question 7 Please write neatlyLead pellets, each of mass 1.90 g, are heated to 200°C. How many pellets must be added to 498 g of water that is initially at 20.0°C to make the equilibrium temperature 25.0°C? Neglect any energy transfer to or from the container. pellets Need Help? Read t