{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ch 7 hw 1 - The due date for this assignment is past Your...

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

View Full Document Right Arrow Icon
Web Assign Ch7 HW1 f10 (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 7 / 7 Due : Wednesday, October 27, 2010 11:30 PM CDT 1. 1/1 points Question: MI3 7.1.X.025 2. 1/1 points Question: MI3 7.1.X.022 A spring has a relaxed length of 8 cm and a stiffness of 150 N/m. How much work must you do to change its length from 13 cm to 16 cm? 0.2925 N·m 3. 1/1 points Question: MI3 7.1.X.002 A horizontal spring with stiffness 0.5 N/m has a relaxed length of 19 cm ( 0.19 m). A mass of 18 grams ( 0.018 kg) is attached and you stretch the spring to a total length of 29 cm ( 0.29 m). The mass is then released from rest. What is the speed of the mass at the moment when the spring returns to its relaxed length of 19 cm ( 0.19 m)? v = 0.527 m/s 4. 4/4 points Question: MI3 7.2.P.032 The figure shows a potential energy curve for the interaction of two neutral atoms. The two- atom system is in a vibrational state indicated by the heavy solid horizontal line.
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The due date for this assignment is past. Your work can be viewed below, but no changes can be made. View Key A spring whose stiffness is 1110 N/m has a relaxed length of 0.57 m. If the length of the spring changes from 0.32 m to 0.88 m, what is the change in the potential energy of the spring? Δ U = 18.648 J Page 1 of 2 Ch7 HW1 f10 11/21/2010 http://www.webassign.net/[email protected]/[email protected] .. (a) At r = r 1 , what are the approximate values of the kinetic energy K , the potential energy U , and the quantity K + U ? K = 1.1 eV U = -1.3 eV K + U = -.2 eV (b) What minimum (positive) amount of energy must be supplied to cause these two atoms to separate? .2 eV Page 2 of 2 Ch7 HW1 f10 11/21/2010 http://www.webassign.net/[email protected]/[email protected] .....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern