_______________ are objects of known luminosity used for finding distances
Fill in the blank(s) with correct word
Standard candles
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Originally 2.00 mol of gas are at standard temperature and pressure If the temperature changes to 47.0°C and the pressure decreases to half of what it was, how many liters do the two moles now occupy? (1 atm = 101 kPa, R = 8.31 J/mol ? K)
What will be an ideal response?
Suppose you use the Southern Cross to determine that the south celestial pole appears 40 degrees above your horizon. Then you must be located at
A) latitude 40 degrees north. B) latitude 50 degrees south. C) latitude 40 degrees south. D) longitude 40 degrees.
Physically, why is a gas molecule’s speed v more likely to be near vp than near 2 vp?
A. There are fewer quantum states for larger speeds than there are at speeds near vp.
B. The Boltzmann factor is larger at vp than at 2vp.
C. We know that 
A hockey puck slides off the edge of a table with an initial velocity of 20.0 m/s. The height of the table above the ground is 2.00 m. How far from the edge of the table, measured along the floor, does the puck hit the floor?
A) 20.0 m B) 40.0 m C) 12.8 m D) 19.6 m E) 6.4 m