Question

16. A boy on a bicycle rides in a circle of radius r_o at speed v_o. If the boy rides at the same radius r_o, by what approximate factor must he change his speed in order to triple his radial acceleration?

Multiple Choice

• 9.0

• 0.33

• 0.11

• 3.0

• 1.7

• 0.58

19.  1.50 moles of an ideal gas freely expands from 1.00 liter to 4.50 liters. The change in entropy of the gas in the expansion is

Multiple Choice

• 16.3 J/K

• 18.7 J/K

• 5.80 J/K

• 8.50 J/K

(PLEASE ANSWER BOTH!!)

Answer 1