HW_5 - Homework Assignment 5 1 Beginning from rest an...

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

View Full Document Right Arrow Icon
Homework Assignment 5 1. Beginning from rest, an object of mass 20 kg slides down a 5-m-long ramp. The ramp is inclined at an angle of 30º from the horizontal. If air resistance and friction between the object and ramp are negligible, determine the velocity of the object, in m/s, at the bottom of the ramp. 2. A stationary closed system of mass 3 kg undergoes a process in which there is a heat transfer of 150 kJ from the system to the surroundings. The work done on the system is 75 kJ. If the specific internal energy of the system is 450 kJ/kg, what is the final specific internal energy, in kJ/kg? 3. An electric generator coupled to a windmill produces an average electric power output of 15 kW. The power is used to charge a storage battery. Heat transfer from the battery to the surroundings occurs at a constant rate of 1.8 kW. Determine, for 8 hr of operation: a. The total amount of energy stored in the battery, in kJ. b. The value of the stored energy, in $, if electricity is valued at $0.08 per kW*hr.
Image of page 1
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