The molecules of a gas at room temperature move at about
A. 1 km/hr. 0.27 m/s.
B. 500 m/s.
C. 150 km/hr. 40.5 m/s.
D. 10 km/hr. 2.7 m/s.
Answer: B
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In Example 3.10, we calculated the amount of natural gas that you would burn to heat 20 gallons of water from room temperature at 70°F to 120°F to take a shower. Determine the additional amount of gas that must be burned if the water heater has an efficiency of (a) 80 percent, (b) 85 percent, and (c) 90 percent.
What will be an ideal response?
Which country contains the world’s second largest number of Muslims?
a. Pakistan b. Bangladesh c. India d. Afghanistan e. Nepal
An anomalous amount of _______________ is found in the boundary clay of the 65 million-year-old K-T event
Fill in the blank with correct word.
Which of the following is most important to shoreline erosion?
A) Air forced into cracks in rocks B) Abrasion by water-carried materials C) Solution of rocks D) Crystallization of salts in rock crevices and pores E) Waves