physics 4**!!

posted by .

Consider a double-paned window consisting of two panes of glass, each with a thickness of 0.500 cm and an area of 0.880 m2, separated by a layer of air with a thickness of 1.90 cm. The temperature on one side of the window is 0.00°C; the temperature on the other side is 20.0°C. In addition, note that the thermal conductivity of glass is roughly 36 times greater than that of air.
(a) Approximate the heat transfer through this window by ignoring the glass. That is, calculate the heat flow per second through the 1.90 cm of air with a temperature difference of 20.0 C°. (The exact result for the complete window is 21.4 J/s.) Express your answer with three significant digits.
? J/s

(b) Use the approximate heat flow found in part (a) to find an approximate temperature difference across each pane of glass. (The exact result is 0.144 C°.) Express your answer with three significant digits.
? C°

  • physics 4**!! -

    For questions like these, you'll want to show your work. We'll help you where you get stuck.

  • physics 4**!! -

    =(0.0234)(0.880)(20/0.0190)
    =21.67
    =22

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A glass window pane has an area of 3.50 m2 and a thickness of 0.600 cm. If the temperature difference between its surfaces is 27.0°C, what is the rate of energy transfer by conduction through the window?
  2. thermal energy

    1a. what is the rate of energy loss in wattm^-2 through a glass window 3.00mm thick if the outside temp is -20^0c and inside temp is 25^0c. b.) A storm window having the same thickness of glass is installed parallel to the first window …
  3. Physics

    Use the exact values you enter in previous answer(s) to make later calculation(s). Energy-efficient windows are constructed with two panes of glass separated by an air gap (see figure below). In a typical window of this type, the air …
  4. math

    Diana designs stained-glass windows. She has a large supply of square glass window panes. Some panes are yellow, and some panes are red. She wants to place them in windows that are 3x2 in such a way that no two windows are the same, …
  5. physics

    A window has a glass surface of 2686 cm2 and a thickness of 7.4 mm. Find the rate of energy transfer by conduc- tion through this pane when the temperature of the inside surface of the glass is 66◦F and the outside temperature …
  6. Calculus

    Question : Light is absorbed when it passes through a glass window. If r % of light is absorbed by a glass with thickness w, then the percent of light that is absorbed by a piece of glass with a thickness of nw for any natural number …
  7. physics

    A glass window pane has an area of 3.00 m2 and a thickness of 0.600 cm. If the temperature difference between its faces is 25.0°C, what is the rate of energy transfer by conduction through the window.
  8. Physics

    an open tank contains a layer of oil floating on top of a layer of water (of density 1000 kg/m3) that is 3.0 m thick, as shown. What must be the thickness of the oil layer if the gauge pressure at the bottom of the tank is to be 9.1×104 …
  9. Physics

    A glass window pane has an area of 3.50 m2 and a thickness of 0.600 cm. If the temperature difference between its surfaces is 23.0°C, what is the rate of energy transfer by conduction through the window?
  10. physics

    A thin layer of liquid methylene iodide (n=1.756) is sandwiched between two flat parallel plates of glass (n=1.50). What must be the thickness of the liquid layer if normally incident light with in air is to be strongly reflected?

More Similar Questions