The rate of effusion —that is, the leakage of a gas through tiny cracks—is proportional to v rms . If there are tiny cracks in the material that’s used to seal the space between two glass panes, how many times greater is the rate of He leakage out of the space between the panes than me rate of Xe leakage at the same temperature? A. 370 tones B. 19 times C. 6 times D. No greater, the He leakage rate is the same as for Xe.
The rate of effusion —that is, the leakage of a gas through tiny cracks—is proportional to v rms . If there are tiny cracks in the material that’s used to seal the space between two glass panes, how many times greater is the rate of He leakage out of the space between the panes than me rate of Xe leakage at the same temperature? A. 370 tones B. 19 times C. 6 times D. No greater, the He leakage rate is the same as for Xe.
The rate of effusion—that is, the leakage of a gas through tiny cracks—is proportional to vrms. If there are tiny cracks in the material that’s used to seal the space between two glass panes, how many times greater is the rate of He leakage out of the space between the panes than me rate of Xe leakage at the same temperature?
A. 370 tones
B. 19 times
C. 6 times
D. No greater, the He leakage rate is the same as for Xe.
Taking a Hike
A hiker begins a trip by first walking 21.0 km southeast from her car. She stops and sets up her tent for the night. On the second day, she walks 46.0 km in a direction 60.0° north of east, at which point she discovers a forest ranger's tower.
y (km)
Can
N
W-DE
45.0°
60.0°
Tent
Tower
B
x (km)
☹
(a) Determine the components of the hiker's displacement for each day.
SOLUTION
Conceptualize We conceptualize the problem by drawing a sketch as in the figure. If we denote the displacement vectors on the first and second days by A and B, respectively, and use the ---Select-- as the origin of coordinates, we obtain the vectors shown in the figure. The sketch allows us to estimate the resultant vector as shown.
Categorize Drawing the resultant R, we can now categorize this problem as one we've solved before: --Select-- of two vectors. You should now have a hint of the power of categorization in that many new problems are very similar to problems we have already solved if we are…
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You want to determine if a new material created for solar panels increases the amount of energy that can be captured . You have acquired 15 panels of different sizes manufactured with different materials including the new material.You decide to set up an experiment to solve this problem .What do you think are the 3 most important variables to address in your experience? How would you incorporate those materials in your experiment?
Chapter 15 Solutions
College Physics Volume 1 (Chs. 1-16); Mastering Physics with Pearson eText -- ValuePack Access Card -- for College Physics (10th Edition)
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