Your Comments They said in the prelecture that were assuming the fluid is ideal and thus the density of the fluid does not change. Does that mean in a real life situation the density of a fluid changes with time. [Yes. If the fluid is compressible or a mixture. Oil and water together will sometimes be more water or more oil. Maybe you have a water system that gets calcium or other mineral build ups…]

Hydraulic lifts are counterintuitive. [Are they?]

Mechanics Lecture 25, Slide 1

Final Exam is Saturday August 3rd 10:30 to 12:30. Here in room 141 It will be 35 items ~30% of unit 4, ~23 each of unit 1-3. We will have at least 1 precession question! A hand full similar to harder test ones! Mechanics Lecture 25, Slide 2

Your grade so far Prelectures + Checkpoints + Lectures

100

Prelectures:: Prelectures

50

Labs (9)

150

Preflight's:: Preflight's

25

Quizzes (9)

100

Lecture participation participation:: 25

Homework (26)

150

Hour exams (3 x 100 each)

300

You can miss up to 3 of each The lowest Quiz is dropped and the lowest Homework is dropped

Final Exam

200

To get lecture participation credit you need to vote on at least half of the questions in a lecture. (i.e. it is possible to get part of a bonus point but no participation point for a lecture) Bonus Points: You can earn up to 1 extra bonus point in every lecture (for a maximum of 25 bonus points for the semester) by getting the right answers to at least 5 of the clicker questions. At the end of the semester your bonus points are added to your Quiz scores (max 100 100)) Your total score out of 1000 points determines your final grade. Its just a simple formula – the computer calculates it. Your grade is determined entirely by the your performance on the components of the course as described above.

A+ (950), A (920), AA- (900), B+ (880), B (860), BB- (835), C+ (810), C (780), CC- (750), D+ (720), D (690), DD- (610), and F (