Homework Physics 471J fall 2016

Please make sure your name is on all of your homeworks!


Homework 1 due 10/12/16

Do not look up anything when trying these problems. Show, initial guess and all steps in making OOM approximation.

1) What is the mass of a cow?

2) What is a range of flows for the Chena river?


Homework 2 due 10/19/16

Do not look up anything when trying these problems. Show, initial guess and all steps in making OOM approximation.

1) Imagine a long steel rod hanging under its own weight. How does the maximum length before it breaks depend on its cross-sectional area? Remember the max yield stress is the max force over the area.

2) Given the mass of the sun is ~2 x10^30 kg and the radius of the earth is ~6x10^6 m. Estimate the mass of earth and the ratio mass of sun/mass of earth


Homework 3 due 10/26/16

 


 

 

Last updated 14 October, 2016