SupplementQuestions 2011

SupplementQuestions 2011 - Supplemental Problems for...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1 1. An insulated box contains 5 g of ice at -10 o C. 1 g of steam at 110 o C is injected into the box. Once thermal equilibrium is achieved, the box is observed to contain only liquid water. For the following questions ignore any heat loss to the box or to the air in the box. a) List the energy systems you would need to consider to find the final temperature of the H 2 O. Clearly define the initial and final states and indicate whether these systems are increasing or decreasing. b) Did the overall Bond energy of the ice+steam system increase or decrease? Explain your answer. 2. A student who has not taken Physics 7A says that bonds store energy and release that energy when they break. Using any relevant concepts, models, and/or examples, explain whether you agree or disagree. 3. Heat is added to a sample of material at a constant rate. The sample starts off as a solid at a temperature of 60 K, and as heat is added the sample melts, and then vaporizes. The temperature as a function of energy added to the sample is shown on the plot. From the information provided, determine which is greater, the heat of vaporization or the heat of melting? Explain how you know. From the information provided, determine in which phase, solid, liquid or gas, the sample has the greatest heat capacity? Explain and support your answer with calculations. Supplemental Problems for Physics 7A v1.0; 10/2010
Image of page 1

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

View Full Document Right Arrow Icon
Chapter 2 1. A Physics 7A student stands on a chair and throws a 20g stone straight up in the air. As she lets go of the stone her hand is 2m above the ground. The stone lands on a vertical spring attached to the ground, compressing it fully (10cm) and the stone comes to rest at ground level. The spring constant is 100 N/m = 100 J/m2. What was the original speed of the stone?
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the 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