1. It ain’t what you don’t know that gets you into trouble…
It’s what you know for sure that just ain’t so.
Mark Twain

2. Quiz #1

3. Quiz #2 (Use paper+pencil if it helps!)
Quiz #3: What is the direction of the cross product?
A] out of the page C] along the y axis
B] into the page D] along the -y axis

4. Quiz #4 (Be Careful!) le
Quiz #5

5. Quiz #6
At the spaceport, a (unmanned) rocket ship takes off an reaches a height of 20 miles in 1 minute.
It malfunctions and falls to earth, 2 miles from its lauchpad, in 1 more minute.
What is the magnitude of its AVERAGE VELOCITY ?
A] 0
B] 1 mile/minute
C] 20 miles/minute
D] 40 miles/minute
E] impossible to determine