The Otto Cycle You have a “standard” Otto cycle. At the start of the adiabatic compression $P=100 kPa$ and $T=25 C$. If the efficiency of this engine is $eta=0.48$ and… Click here to read more
Welcome to Physics Homework - Questions & Answers
This site was started back in 2008, and features, among others, a collection of physics homework exercises and tutorials for all levels of physics students (high school and college).
We hope our site will help you advance in your studies and make it easier to understand physics, hence the world that surrounds us!
All the contents of this site were written by Valentin Bogatu (Physics, PhD).
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Bumpy road A car with 4 passengers travels on a rough road with “bumps” at a distance $d$ from each other (a bumpy road). Because of these bumps the car… Click here to read more
Rolling wheel A full wheel rolls on an inclined plane without slipping. In an experiment, you measure the following experimental data for this rolling wheel: Wheel Radius: $R = (3.25… Click here to read more
The Stromboli Volcano When the Stromboli volcano is active a big gas bubble rise up in the volcano lava. At some moment when the pressure of the bubble is big,… Click here to read more