# A load supporting cone bearing is shown below the

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: D" Figure 2: Pile driving 4. A load supporting cone bearing is shown below. The solid cone is designed to rotate while supporting load. The cone has a base radius of R, density ρc , and angle φ that is immersed in a ﬂuid and adjacent to a conical seat as shown in the ﬁgure. The cone is initially rotating at an angular velocity of ω0 . The cone and seat are separated by a ﬂuid ﬁlled gap s. The ﬂuid has a viscosity µ. (i) Derive an analytical expression for the torque to maintain the cone at a constant angular velocity. (ii) if the external torque driving the cone is removed, derive an equation for the cone’s angular velocity as a function of time ω (t). ω(t)" R" φ" s" Figure 3: Rotating cone. 5. When you pour a carbonated drink (e.g. beer, soda) small bubbles of carbon dioxide form because the thermodynamic pressure has been been reduced and the liquid is now super saturated with carbon dioxide gas. (a) What is the pressure inside the bubble as a function of the bubble size? (b) How many molecules are inside the bubble? (c) If the droplet is very...
View Full Document

## This document was uploaded on 02/06/2014.

Ask a homework question - tutors are online