I) Here's an equation from the course that finds the magnetic field at the center of a solenoid: Be = nl You don't yet need to know anything about it to do the calculation except that n is a counting index, Ho is a constant from the PRC (see "Syllabus" area for the course), and if you don't have a r button on your calculator that's also on the sheet. Values you might get in a problem are: |= 2.34 A n = 20 r= 2.452 • 10-² m Substitute these into the equation and solve it for the field, B. A) B, = 3.8 T839. 10* T B) B; = 3.818 39. 10“7 C) B, = 3.818 59. 104 I D) Be - 2.2658 x 10T E) B, - 2.2658 * 10 T F) B, - 2.25 58 x 10“ T G) the correct answer is not represented here, though there is enough information to find it H) there is not enough given information to solve this problem 2) The Martha's Vineyard 20-Miler is a running race in which participants with nothing better to do in the dead of winter go run 20.000 mi on an island. Many races are advertised in kilometers instead of miles (though they leave off the "m" in their advertisements, much to the chagrin of scientists and and anyone trying to teach science). How long is the race in units of km? A) 3.21869 - 10' km B) 3. Z 1869 - 10' km C) 3.2ī 869 . 10' km D) 3.218 69. 10' km E) 3.21869- 10' km F) 3.21869 - 10' km

I) Here's an equation from the course that finds the magnetic field at the center of a solenoid: Be = nl You don't yet need to know anything about it to do the calculation except that n is a counting index, Ho is a constant from the PRC (see "Syllabus" area for the course), and if you don't have a r button on your calculator that's also on the sheet. Values you might get in a problem are: |= 2.34 A n = 20 r= 2.452 • 10-² m Substitute these into the equation and solve it for the field, B. A) B, = 3.8 T839. 10* T B) B; = 3.818 39. 10“7 C) B, = 3.818 59. 104 I D) Be - 2.2658 x 10T E) B, - 2.2658 * 10 T F) B, - 2.25 58 x 10“ T G) the correct answer is not represented here, though there is enough information to find it H) there is not enough given information to solve this problem 2) The Martha's Vineyard 20-Miler is a running race in which participants with nothing better to do in the dead of winter go run 20.000 mi on an island. Many races are advertised in kilometers instead of miles (though they leave off the "m" in their advertisements, much to the chagrin of scientists and and anyone trying to teach science). How long is the race in units of km? A) 3.21869 - 10' km B) 3. Z 1869 - 10' km C) 3.2ī 869 . 10' km D) 3.218 69. 10' km E) 3.21869- 10' km F) 3.21869 - 10' km