Desert Eagle Prices Gold

The machine of Bars

In steel company have invented a method to produce metal bars in a continuous cycle.

The machine that produces drops under the action of gravitational force alone, the metal in plastic (to a suitable temperature).

The metal contained in a hopper, is passed through a hole (the diameter of which varies depending on production needs) (see Figure 1).

Suppose you know the following parameters: the density of the metal, the cohesive force f [N / m 2] ( Understanding how the force per unit area with which the Part A and Part B claims, conversely, part B pulls the part A, v. Figure 2), constant speed v with which the material falls.

Assuming that the machine works for 1 hour try to answer the following questions:

1. described the physical mechanism that enables the production of single bars by plastic mass fall;


2. calculated the length of each bar produced;


3. calculated how many bars are produced in a time of machine operation.

Bonuses and time:

contribution remains open until 24 to Wednesday, 18/03/2009;

for each correct answer and adequately justified (+ +) ; the proposal is restricted to students of III until 24 on Sunday, will be accepted after the participation of everyone.

Good job!

SP