Which of the following stars is an example of a spectroscopic binary system?
A) Mizar
B) Triton
C) Europa
D) Ceres
A
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How many molecules of sucrose are in a 0.5 moles of sucrose?
A) 3.01 × 1023 molecules of sucrose B) 6.02 × 1023 molecules of sucrose C) 12.04 × 1023 molecules of sucrose D) 0.5 E) 1 gram
Which of these are English units?
a. seconds b. feet c. kilometers d. slugs
at point b? 
A. ?0 I/4?R B. ?0 I/2?R C. ?0 I/?R D. ?0 I/R E. (2 + ?)?0 I/4?R F. Zero
First Law of Thermodynamics: A sealed rigitd tank contains 30 moles of an ideal gas, at an initial temperature of 270 K. The pressure of the gas is increased until the final pressure equals 1.40 times the initial pressure. The heat capacity at constant pressure of the gas is 32.0 J/mol ? K. What is the change in the internal (thermal) energy of the gas during this process? (R = 8.31 J/mol ? K)
A. 77 kJ B. 100 kJ C. 130 kJ D. -50 kJ E. -23 kJ