On a warm summer day Mrs. George sliced some strawberries and placed them in a zippered sandwich bag and sealed it with enough air to provide protective air space for the strawberries. She then placed the sealed bag in the refrigerator to keep the strawberries cool. Describe what happens to the bag as it cools in the refrigerator. Why does this happen?

QUESTION 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…

You are standing in Death Valley, California on a summer afternoon, and the temperature is well above 100 degrees.  You place a piece of asphalt (Specific Heat = 0.915 J/g°C) and a piece of concrete (Specific Heat = 0.879 J/g°C) on the ground next to one another.  If you were to crack an egg onto each surface, which one would be more likely to fry the egg completely?  Please explain.

Estilos Edición P5. A rigid container contains water vapor at 250°C and an unknown pressure. When the container cools to 150°C, the vapor begins to condense. Estimate the initial pressure in the container. Plot the thermodynamic process on a phase diagram. Answer: 600 kPa.