Dew on the grass results from
1) fast-moving molecules.
2) evaporation.
3) open-structured water crystals.
4) the pressure of the atmosphere on water vapor.
5) the slowing down of fast-moving water molecules.
As dew forms on the grass, energy is
6) given to the grass by the water vapor.
7) given up by the grass to the water vapor.
Answer: 5, 6
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A star's absolute brightness is calculated at a standard distance of 10 parsecs
a. True b. False Indicate whether the statement is true or false
A rod with a diameter of 2.00 mm projects 20.0 mm horizontally outward from a wall. A 2.00 N coat is hung from the end of the rod and the rod deflects downward by 
The shear stress of the rod is
a. 
b. 
c. 
d. 
e. 
The number of stars in the observable universe
A) is approximately equal to the population of the Earth at the turn of the 21st century B) cannot be estimated C) is approximately equal to the total number of sand grains on every beach on Earth D) is infinitely large
A jar holds 2.0 L of ideal nitrogen gas, N2, at STP. The atomic mass of nitrogen is 14.0 g/mol, the ideal gas constant is R = 8.31 J/mol ? K, Avogadro's number is NA = 6.022 × 1023 molecules/mol, and 1.00 atm = 101 kPa
(a) How many moles of nitrogen are in the jar? (b) How many nitrogen molecules are in the jar? (c) What is the mass of the nitrogen in the jar?