HW22 - schneiter (tcs639) – HW22 – Ross – (89152) 1...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: schneiter (tcs639) – HW22 – Ross – (89152) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points In a car lift used in a service station, com- pressed air exerts a force on a small piston of circular cross-section having a radius of 4 . 18 cm. This pressure is transmitted by a liquid to a second piston of radius 24 . 2 cm. What force must the compressed air exert in order to lift a car weighing 11700 N? Correct answer: 349 . 066 N. Explanation: Let : r 1 = 4 . 18 cm , r 2 = 24 . 2 cm , and F 2 = 11700 N . Because the pressure exerted by the compressed air is transmitted undiminished throughout the fluid, we have F 1 A 1 = F 2 A 2 F 1 = parenleftbigg A 1 A 2 parenrightbigg F 2 = parenleftbigg π r 2 1 π r 2 2 parenrightbigg F 2 = π (4 . 18 cm) 2 π (24 . 2 cm) 2 (11700 N) = 349 . 066 N . 002 (part 2 of 2) 10.0 points What air pressure will produce this force? Correct answer: 63592 . 4 Pa. Explanation: P = F 1 A 1 = F 1 π r 2 1 = 349 . 066 N π (24 . 2 cm) 2 · parenleftbigg 100 cm 1 m parenrightbigg 2 = 63592 . 4 Pa . 003 (part 1 of 2) 10.0 points Calculate the pressure at an ocean depth of 1370 m. The acceleration of grav- ity is 9 . 8 m / s 2 , atmospheric pressure is...
View Full Document

This note was uploaded on 04/23/2009 for the course PHYS 152 taught by Professor Button during the Spring '08 term at IUPUI.

Page1 / 3

HW22 - schneiter (tcs639) – HW22 – Ross – (89152) 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online